Sddm black screen after rebase to Fedora Kinoite 36

After updating to Fedora Kinoite 36, it seems SDDM hangs.
I see a black screen with an immovable cursor. I can’t change TTY, and REISUO does nothing to change the situation.

Help is much appreciated.

Related errors from journalctl:

mai 08 14:27:44 fedora systemd[1349]: pam_unix(systemd-user:session): session opened for user sddm(uid=982) by (uid=0)
mai 08 14:27:44 fedora audit[1349]: USER_START pid=1349 uid=0 auid=982 ses=1 subj=system_u:system_r:init_t:s0 msg='op=PAM:session_open grantors=pam_selinux,pam_selinux,pam_loginuid,pam_namespace,pam_keyinit,pam_limits,pam_systemd,pam_unix acct="sddm" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
mai 08 14:27:44 fedora systemd[1349]: libbpf: Error in bpf_object__probe_loading():Operation not permitted(1). Couldn't load trivial BPF program. Make sure your kernel supports BPF (CONFIG_BPF_SYSCALL=y) and/or that RLIMIT_MEMLOCK is set to big enough value.
mai 08 14:27:44 fedora systemd[1349]: libbpf: failed to load object 'socket_bind_bpf'
mai 08 14:27:44 fedora systemd[1349]: libbpf: failed to load BPF skeleton 'socket_bind_bpf': -1
mai 08 14:27:44 fedora systemd[1349]: libbpf: Error in bpf_object__probe_loading():Operation not permitted(1). Couldn't load trivial BPF program. Make sure your kernel supports BPF (CONFIG_BPF_SYSCALL=y) and/or that RLIMIT_MEMLOCK is set to big enough value.
mai 08 14:27:44 fedora systemd[1349]: libbpf: failed to load object 'restrict_ifaces_bpf'
mai 08 14:27:44 fedora systemd[1349]: libbpf: failed to load BPF skeleton 'restrict_ifaces_bpf': -1
mai 08 14:27:44 fedora systemd[1349]: Failed to load BPF object: Operation not permitted
mai 08 14:27:45 fedora systemd[1349]: Queued start job for default target default.target.
mai 08 14:27:45 fedora systemd[1349]: Created slice app.slice - User Application Slice.
mai 08 14:27:45 fedora systemd[1349]: grub-boot-success.timer - Mark boot as successful after the user session has run 2 minutes was skipped because of a failed condition check (ConditionUser=!@system).

This log complains about sddm theme “chili”, but I’ve already removed references to it from sddm.conf.

mai 08 14:27:46 fedora sddm-greeter[1359]: QObject: Cannot create children for a parent that is in a different thread.
                                           (Parent is QGuiApplication(0x7ffcec858980), parent's thread is QThread(0x56447445ee10), current thread is QThread(0x56447456df50)
mai 08 14:27:46 fedora sddm-greeter[1359]: QObject::installEventFilter(): Cannot filter events for objects in a different thread.
mai 08 14:27:46 fedora sddm-greeter[1359]: file:///var/lib/sddm/themes/plasma-chili/Main.qml:336:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
mai 08 14:27:46 fedora sddm-greeter[1359]: file:///var/lib/sddm/themes/plasma-chili/components/VirtualKeyboard.qml:22:1: Type InputPanel unavailable
mai 08 14:27:46 fedora sddm-greeter[1359]: qrc:/QtQuick/VirtualKeyboard/content/InputPanel.qml:127:5: Type Keyboard unavailable
mai 08 14:27:46 fedora sddm-greeter[1359]: qrc:/QtQuick/VirtualKeyboard/content/components/Keyboard.qml:38:1: module "QtQuick.VirtualKeyboard.Plugins" is not installed
mai 08 14:27:46 fedora wpa_supplicant[1308]: wlp3s0: CTRL-EVENT-REGDOM-CHANGE init=DRIVER type=COUNTRY alpha2=DE
mai 08 14:27:47 fedora sddm-greeter[1359]: file:///var/lib/sddm/themes/plasma-chili/Login.qml:120:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
mai 08 14:27:47 fedora sddm-greeter[1359]: file:///var/lib/sddm/themes/plasma-chili/Login.qml:129:5: QML Image: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
mai 08 14:27:47 fedora sddm-greeter[1359]: file:///var/lib/sddm/themes/plasma-chili/Login.qml:129:5: QML Image: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
mai 08 14:27:47 fedora sddm-greeter[1359]: QFont::setPointSizeF: Point size <= 0 (0.000000), must be greater than 0
mai 08 14:27:47 fedora sddm-greeter[1359]: file:///var/lib/sddm/themes/plasma-chili/components/Clock.qml:30:5: QML KeyboardButton: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
mai 08 14:27:47 fedora sddm-greeter[1359]: file:///var/lib/sddm/themes/plasma-chili/components/Clock.qml:30:5: QML KeyboardButton: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
mai 08 14:27:47 fedora sddm-greeter[1359]: file:///usr/lib64/qt5/qml/QtQuick/Controls/Styles/Base/ButtonStyle.qml:153:31: QML QQuickItem: Binding loop detected for property "implicitWidth"
mai 08 14:27:47 fedora sddm-greeter[1359]: file:///var/lib/sddm/themes/plasma-chili/components/ActionButton.qml:56:9: Unable to assign [undefined] to double
mai 08 14:27:47 fedora sddm-greeter[1359]: file:///var/lib/sddm/themes/plasma-chili/components/ActionButton.qml:56:9: Unable to assign [undefined] to double
mai 08 14:27:47 fedora sddm-greeter[1359]: file:///var/lib/sddm/themes/plasma-chili/components/ActionButton.qml:56:9: Unable to assign [undefined] to double
mai 08 14:27:47 fedora sddm-greeter[1359]: file:///var/lib/sddm/themes/plasma-chili/Login.qml:129:5: QML Image: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
mai 08 14:27:47 fedora sddm-greeter[1359]: file:///var/lib/sddm/themes/plasma-chili/Login.qml:129:5: QML Image: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
mai 08 14:27:47 fedora sddm-greeter[1359]: file:///var/lib/sddm/themes/plasma-chili/Login.qml:129:5: QML Image: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
mai 08 14:27:47 fedora sddm-greeter[1359]: file:///var/lib/sddm/themes/plasma-chili/Login.qml:129:5: QML Image: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
mai 08 14:27:47 fedora sddm-greeter[1359]: file:///var/lib/sddm/themes/plasma-chili/components/Clock.qml:30:5: QML KeyboardButton: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
mai 08 14:27:47 fedora sddm-greeter[1359]: <input>:303:258: Could not add child element to parent element because the types are incorrect.
mai 08 14:27:47 fedora sddm-greeter[1359]: <input>:303:463: Could not add child element to parent element because the types are incorrect.
mai 08 14:27:47 fedora sddm-greeter[1359]: <input>:303:659: Could not add child element to parent element because the types are incorrect.
mai 08 14:27:47 fedora sddm-greeter[1359]: <input>:303:913: Could not add child element to parent element because the types are incorrect.
mai 08 14:27:47 fedora sddm-greeter[1359]: <input>:303:1049: Could not add child element to parent element because the types are incorrect.
mai 08 14:27:47 fedora sddm-greeter[1359]: <input>:303:1251: Could not add child element to parent element because the types are incorrect.
mai 08 14:27:47 fedora sddm-greeter[1359]: <input>:303:1453: Could not add child element to parent element because the types are incorrect.
mai 08 14:27:47 fedora sddm-greeter[1359]: <input>:303:1631: Could not add child element to parent element because the types are incorrect.
mai 08 14:27:47 fedora sddm-greeter[1359]: <input>:303:1739: Could not add child element to parent element because the types are incorrect.
mai 08 14:27:47 fedora sddm-greeter[1359]: <input>:303:1980: Could not add child element to parent element because the types are incorrect.
mai 08 14:27:47 fedora sddm-greeter[1359]: <input>:303:2223: Could not add child element to parent element because the types are incorrect.
mai 08 14:27:47 fedora kernel: nouveau 0000:01:00.0: DRM: Moving pinned object 000000006d19a07e!
mai 08 14:27:47 fedora kernel: BUG: kernel NULL pointer dereference, address: 000000000000000c
mai 08 14:27:47 fedora kernel: #PF: supervisor read access in kernel mode
mai 08 14:27:47 fedora kernel: #PF: error_code(0x0000) - not-present page
mai 08 14:27:47 fedora kernel: PGD 0 P4D 0
mai 08 14:27:47 fedora kernel: Oops: 0000 [#1] PREEMPT SMP PTI
mai 08 14:27:47 fedora kernel: CPU: 0 PID: 1275 Comm: Xorg Not tainted 5.17.5-300.fc36.x86_64 #1
mai 08 14:27:47 fedora kernel: Hardware name: Notebook                         P95xER                         /P95xER                         , BIOS 1.07.15 11/16/2018
mai 08 14:27:47 fedora kernel: RIP: 0010:nouveau_gem_prime_get_sg_table+0x10/0x20 [nouveau]
mai 08 14:27:47 fedora kernel: Code: 68 38 88 58 39 49 89 45 00 31 c0 5b 5d 41 5c 41 5d c3 cc b8 f4 ff ff ff eb f1 0f 1f 44 00 00 48 8b 87 70 01 00 00 48 8b 7f 08 <8b> 50 0c 48 8b 30 e9 25 4a 1c e4 0f 1f 44 00 00 0f 1f 44 00 00 41
mai 08 14:27:47 fedora kernel: RSP: 0018:ffffb3ce81a67a90 EFLAGS: 00010286
mai 08 14:27:47 fedora kernel: RAX: 0000000000000000 RBX: ffff9c62f578ba80 RCX: 0000000000000000
mai 08 14:27:47 fedora kernel: RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9c62cde86800
mai 08 14:27:47 fedora kernel: RBP: 0000000000000000 R08: ffffb3ce81a67b48 R09: 0000000000000009
mai 08 14:27:47 fedora kernel: R10: ffff9c62cac26800 R11: ffff9c62f41c40c0 R12: ffff9c62f578ba80
mai 08 14:27:47 fedora kernel: R13: 0000000000000000 R14: ffff9c63051301f8 R15: ffff9c6305130270
mai 08 14:27:47 fedora kernel: FS:  00007f7d0c3d9fc0(0000) GS:ffff9c6a1da00000(0000) knlGS:0000000000000000
mai 08 14:27:47 fedora kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
mai 08 14:27:47 fedora kernel: CR2: 000000000000000c CR3: 000000014e11c004 CR4: 00000000003706f0
mai 08 14:27:47 fedora kernel: Call Trace:
mai 08 14:27:47 fedora kernel:  <TASK>
mai 08 14:27:47 fedora kernel:  drm_gem_map_dma_buf+0x32/0xa0
mai 08 14:27:47 fedora kernel:  dma_buf_map_attachment+0x8a/0xe0
mai 08 14:27:47 fedora kernel:  ? __pm_runtime_resume+0x54/0x70
mai 08 14:27:47 fedora kernel:  i915_gem_object_get_pages_dmabuf+0x1e/0xa0 [i915]
mai 08 14:27:47 fedora kernel:  __i915_gem_object_get_pages+0x31/0x40 [i915]
mai 08 14:27:47 fedora kernel:  intel_pin_and_fence_fb_obj+0x2d2/0x420 [i915]
mai 08 14:27:47 fedora kernel:  intel_plane_pin_fb+0x67/0x390 [i915]
mai 08 14:27:47 fedora kernel:  ? intel_atomic_check+0x236b/0x2c10 [i915]
mai 08 14:27:47 fedora kernel:  intel_prepare_plane_fb+0xde/0x2b0 [i915]
mai 08 14:27:47 fedora kernel:  ? _raw_spin_unlock_irqrestore+0x25/0x40
mai 08 14:27:47 fedora kernel:  drm_atomic_helper_prepare_planes+0x74/0x150
mai 08 14:27:47 fedora kernel:  intel_atomic_commit+0x81/0x390 [i915]
mai 08 14:27:47 fedora kernel:  drm_atomic_helper_page_flip+0x5b/0xc0
mai 08 14:27:47 fedora kernel:  drm_mode_page_flip_ioctl+0x56b/0x5c0
mai 08 14:27:47 fedora kernel:  ? drm_mode_cursor2_ioctl+0x10/0x10
mai 08 14:27:47 fedora kernel:  drm_ioctl_kernel+0x9e/0x140
mai 08 14:27:47 fedora kernel:  drm_ioctl+0x21c/0x410
mai 08 14:27:47 fedora kernel:  ? drm_mode_cursor2_ioctl+0x10/0x10
mai 08 14:27:47 fedora kernel:  ? handle_mm_fault+0xae/0x280
mai 08 14:27:47 fedora kernel:  __x64_sys_ioctl+0x8d/0xc0
mai 08 14:27:47 fedora kernel:  do_syscall_64+0x3a/0x80
mai 08 14:27:47 fedora kernel:  entry_SYSCALL_64_after_hwframe+0x44/0xae
mai 08 14:27:47 fedora kernel: RIP: 0033:0x7f7d0cc4e1bf
mai 08 14:27:47 fedora kernel: Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 18 48 8b 44 24 18 64 48 2b 04 25 28 00 00
mai 08 14:27:47 fedora kernel: RSP: 002b:00007ffc6492bf20 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
mai 08 14:27:47 fedora kernel: RAX: ffffffffffffffda RBX: 00007f7d095e6000 RCX: 00007f7d0cc4e1bf
mai 08 14:27:47 fedora kernel: RDX: 00007ffc6492bfe0 RSI: 00000000c01864b0 RDI: 0000000000000011
mai 08 14:27:47 fedora kernel: RBP: 00007ffc6492bfe0 R08: 000055d703dfb630 R09: 0000000000000001
mai 08 14:27:47 fedora kernel: R10: 000055d703dfb4f0 R11: 0000000000000246 R12: 00000000c01864b0
mai 08 14:27:47 fedora kernel: R13: 0000000000000011 R14: 000055d703a92c70 R15: 000055d703dfb630
mai 08 14:27:47 fedora kernel:  </TASK>
mai 08 14:27:47 fedora kernel: Modules linked in: nft_objref nf_conntrack_netbios_ns nf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables nfnetlink sunrpc qrtr bnep vfat fat snd_sof_pci_intel_cnl snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof soundwire_bus snd_soc_skl snd_soc_hdac_hda snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_acpi_intel_match snd_soc_acpi intel_rapl_msr iwlmvm intel_rapl_common snd_soc_core snd_hda_codec_realtek snd_compress snd_hda_codec_generic ac97_bus ledtrig_audio snd_pcm_dmaengine snd_hda_codec_hdmi mac80211 intel_tcc_cooling x86_pkg_temp_thermal intel_powerclamp snd_hda_intel coretemp snd_intel_dspcfg iTCO_wdt snd_intel_sdw_acpi libarc4 intel_pmc_bxt mei_hdcp mei_pxp ee1004 iTCO_vendor_support snd_hda_codec
mai 08 14:27:47 fedora kernel:  kvm_intel iwlwifi btusb btrtl snd_hda_core btbcm kvm snd_hwdep uvcvideo btintel iwlmei snd_seq btmtk irqbypass videobuf2_vmalloc rapl videobuf2_memops videobuf2_v4l2 snd_seq_device intel_cstate bluetooth cfg80211 snd_pcm intel_uncore videobuf2_common snd_timer videodev joydev wmi_bmof pcspkr snd mei_me r8169 i2c_i801 ecdh_generic i2c_smbus mc rfkill mei soundcore intel_pch_thermal intel_hid acpi_pad sparse_keymap zram dm_crypt dm_multipath sdhci_pci cqhci crct10dif_pclmul crc32_pclmul crc32c_intel nouveau i915 sdhci nvme mxm_wmi ghash_clmulni_intel serio_raw mmc_core nvme_core drm_ttm_helper ttm wmi video ip6_tables ip_tables ipmi_devintf ipmi_msghandler fuse
mai 08 14:27:47 fedora kernel: CR2: 000000000000000c
mai 08 14:27:47 fedora kernel: ---[ end trace 0000000000000000 ]---
mai 08 14:27:47 fedora kernel: RIP: 0010:nouveau_gem_prime_get_sg_table+0x10/0x20 [nouveau]
mai 08 14:27:47 fedora kernel: Code: 68 38 88 58 39 49 89 45 00 31 c0 5b 5d 41 5c 41 5d c3 cc b8 f4 ff ff ff eb f1 0f 1f 44 00 00 48 8b 87 70 01 00 00 48 8b 7f 08 <8b> 50 0c 48 8b 30 e9 25 4a 1c e4 0f 1f 44 00 00 0f 1f 44 00 00 41
mai 08 14:27:47 fedora kernel: RSP: 0018:ffffb3ce81a67a90 EFLAGS: 00010286
mai 08 14:27:47 fedora kernel: RAX: 0000000000000000 RBX: ffff9c62f578ba80 RCX: 0000000000000000
mai 08 14:27:47 fedora kernel: RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9c62cde86800
mai 08 14:27:47 fedora kernel: RBP: 0000000000000000 R08: ffffb3ce81a67b48 R09: 0000000000000009
mai 08 14:27:47 fedora kernel: R10: ffff9c62cac26800 R11: ffff9c62f41c40c0 R12: ffff9c62f578ba80
mai 08 14:27:47 fedora kernel: R13: 0000000000000000 R14: ffff9c63051301f8 R15: ffff9c6305130270
mai 08 14:27:47 fedora kernel: FS:  00007f7d0c3d9fc0(0000) GS:ffff9c6a1da00000(0000) knlGS:0000000000000000
mai 08 14:27:47 fedora kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
mai 08 14:27:47 fedora kernel: CR2: 000000000000000c CR3: 000000014e11c004 CR4: 00000000003706f0

The important part seems to be the kernel error messages in the second journal excerpt.
Nouveau has a kernel panic

kernel: BUG: kernel NULL pointer dereference, address: 000000000000000c
mai 09 13:51:59 fedora kernel: nouveau 0000:01:00.0: DRM: Moving pinned object 000000001864966c!
mai 09 13:51:59 fedora kernel: BUG: kernel NULL pointer dereference, address: 000000000000000c
mai 09 13:51:59 fedora kernel: #PF: supervisor read access in kernel mode
mai 09 13:51:59 fedora kernel: #PF: error_code(0x0000) - not-present page
mai 09 13:51:59 fedora kernel: PGD 0 P4D 0
mai 09 13:51:59 fedora kernel: Oops: 0000 [#1] PREEMPT SMP PTI
mai 09 13:51:59 fedora kernel: CPU: 8 PID: 1295 Comm: Xorg Not tainted 5.17.5-300.fc36.x86_64 #1
mai 09 13:51:59 fedora kernel: Hardware name: Notebook                         P95xER                         /P95xER                         , BIOS 1.07.15 11/16/2018
mai 09 13:51:59 fedora kernel: RIP: 0010:nouveau_gem_prime_get_sg_table+0x10/0x20 [nouveau]
mai 09 13:51:59 fedora kernel: Code: 68 38 88 58 39 49 89 45 00 31 c0 5b 5d 41 5c 41 5d c3 cc b8 f4 ff ff ff eb f1 0f 1f 44 00 00 48 8b 87 70 01 00 00 48 8b 7f 08 <8b> 50 0c 48 8b 30 e9 25 5a 24 c3 0f 1f 44 00 00 0f 1f 44 00 00 41
mai 09 13:51:59 fedora kernel: RSP: 0018:ffffc0c581bf7a90 EFLAGS: 00010286
mai 09 13:51:59 fedora kernel: RAX: 0000000000000000 RBX: ffff9efd5f89b4e0 RCX: 0000000000000000
mai 09 13:51:59 fedora kernel: RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9efd0d720000
mai 09 13:51:59 fedora kernel: RBP: 0000000000000000 R08: ffffc0c581bf7b48 R09: 0000000000000009
mai 09 13:51:59 fedora kernel: R10: ffff9efd00ff2800 R11: ffff9efd05b44840 R12: ffff9efd5f89b4e0
mai 09 13:51:59 fedora kernel: R13: 0000000000000000 R14: ffff9efd1dc264f8 R15: ffff9efd1dc26570
mai 09 13:51:59 fedora kernel: FS:  00007f5338e53fc0(0000) GS:ffff9f045dc00000(0000) knlGS:0000000000000000
mai 09 13:51:59 fedora kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
mai 09 13:51:59 fedora kernel: CR2: 000000000000000c CR3: 0000000108b66005 CR4: 00000000003706e0
mai 09 13:51:59 fedora kernel: Call Trace:
mai 09 13:51:59 fedora kernel:  <TASK>
mai 09 13:51:59 fedora kernel:  drm_gem_map_dma_buf+0x32/0xa0
mai 09 13:51:59 fedora kernel:  dma_buf_map_attachment+0x8a/0xe0
mai 09 13:51:59 fedora kernel:  ? __pm_runtime_resume+0x54/0x70
mai 09 13:51:59 fedora kernel:  i915_gem_object_get_pages_dmabuf+0x1e/0xa0 [i915]
mai 09 13:51:59 fedora kernel:  __i915_gem_object_get_pages+0x31/0x40 [i915]
mai 09 13:51:59 fedora kernel:  intel_pin_and_fence_fb_obj+0x2d2/0x420 [i915]
mai 09 13:51:59 fedora kernel:  intel_plane_pin_fb+0x67/0x390 [i915]
mai 09 13:51:59 fedora kernel:  ? intel_atomic_check+0x236b/0x2c10 [i915]
mai 09 13:51:59 fedora kernel:  intel_prepare_plane_fb+0xde/0x2b0 [i915]
mai 09 13:51:59 fedora kernel:  ? _raw_spin_unlock_irqrestore+0x25/0x40
mai 09 13:51:59 fedora kernel:  drm_atomic_helper_prepare_planes+0x74/0x150
mai 09 13:51:59 fedora kernel:  intel_atomic_commit+0x81/0x390 [i915]
mai 09 13:51:59 fedora kernel:  drm_atomic_helper_page_flip+0x5b/0xc0
mai 09 13:51:59 fedora kernel:  drm_mode_page_flip_ioctl+0x56b/0x5c0
mai 09 13:51:59 fedora kernel:  ? drm_mode_cursor2_ioctl+0x10/0x10
mai 09 13:51:59 fedora kernel:  drm_ioctl_kernel+0x9e/0x140
mai 09 13:51:59 fedora kernel:  drm_ioctl+0x21c/0x410
mai 09 13:51:59 fedora kernel:  ? drm_mode_cursor2_ioctl+0x10/0x10
mai 09 13:51:59 fedora kernel:  __x64_sys_ioctl+0x8d/0xc0
mai 09 13:51:59 fedora kernel:  do_syscall_64+0x3a/0x80
mai 09 13:51:59 fedora kernel:  entry_SYSCALL_64_after_hwframe+0x44/0xae
mai 09 13:51:59 fedora kernel: RIP: 0033:0x7f53396c81bf
mai 09 13:51:59 fedora kernel: Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 18 48 8b 44 24 18 64 48 2b 04 25 28 00 00
mai 09 13:51:59 fedora kernel: RSP: 002b:00007ffee35ef5d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
mai 09 13:51:59 fedora kernel: RAX: ffffffffffffffda RBX: 00007f5336060000 RCX: 00007f53396c81bf
mai 09 13:51:59 fedora kernel: RDX: 00007ffee35ef690 RSI: 00000000c01864b0 RDI: 0000000000000011
mai 09 13:51:59 fedora kernel: RBP: 00007ffee35ef690 R08: 0000555ed0ee6b50 R09: 0000000000000001
mai 09 13:51:59 fedora kernel: R10: 0000555ed12a4100 R11: 0000000000000246 R12: 00000000c01864b0
mai 09 13:51:59 fedora kernel: R13: 0000000000000011 R14: 0000555ed0dd8c70 R15: 0000555ed0ee6b50
mai 09 13:51:59 fedora kernel:  </TASK>
mai 09 13:51:59 fedora kernel: Modules linked in: nft_objref nf_conntrack_netbios_ns nf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables nfnetlink qrtr bnep sunrpc vfat fat snd_sof_pci_intel_cnl snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof intel_rapl_msr intel_rapl_common soundwire_bus snd_soc_skl snd_soc_hdac_hda snd_hda_ext_core snd_soc_sst_ipc iwlmvm intel_tcc_cooling snd_soc_sst_dsp x86_pkg_temp_thermal intel_powerclamp snd_soc_acpi_intel_match mac80211 coretemp snd_soc_acpi snd_soc_core libarc4 kvm_intel snd_hda_codec_realtek snd_compress snd_hda_codec_generic iTCO_wdt intel_pmc_bxt ac97_bus mei_hdcp mei_pxp ee1004 iTCO_vendor_support ledtrig_audio snd_hda_codec_hdmi snd_pcm_dmaengine snd_hda_intel kvm iwlwifi btusb snd_intel_dspcfg
mai 09 13:51:59 fedora kernel:  snd_intel_sdw_acpi btrtl snd_hda_codec uvcvideo snd_hda_core btbcm irqbypass iwlmei videobuf2_vmalloc rapl btintel snd_hwdep intel_cstate videobuf2_memops snd_seq intel_uncore btmtk cfg80211 snd_seq_device videobuf2_v4l2 bluetooth pcspkr wmi_bmof snd_pcm videobuf2_common i2c_i801 mei_me r8169 i2c_smbus videodev mei snd_timer joydev snd mc ecdh_generic rfkill soundcore intel_pch_thermal intel_hid sparse_keymap acpi_pad zram dm_crypt dm_multipath crct10dif_pclmul sdhci_pci crc32_pclmul cqhci crc32c_intel i915 nouveau sdhci nvme ghash_clmulni_intel mmc_core nvme_core serio_raw mxm_wmi drm_ttm_helper ttm wmi video ip6_tables ip_tables ipmi_devintf ipmi_msghandler fuse
mai 09 13:51:59 fedora kernel: CR2: 000000000000000c
mai 09 13:51:59 fedora kernel: ---[ end trace 0000000000000000 ]---
mai 09 13:51:59 fedora kernel: RIP: 0010:nouveau_gem_prime_get_sg_table+0x10/0x20 [nouveau]
mai 09 13:51:59 fedora kernel: Code: 68 38 88 58 39 49 89 45 00 31 c0 5b 5d 41 5c 41 5d c3 cc b8 f4 ff ff ff eb f1 0f 1f 44 00 00 48 8b 87 70 01 00 00 48 8b 7f 08 <8b> 50 0c 48 8b 30 e9 25 5a 24 c3 0f 1f 44 00 00 0f 1f 44 00 00 41
mai 09 13:51:59 fedora kernel: RSP: 0018:ffffc0c581bf7a90 EFLAGS: 00010286
mai 09 13:51:59 fedora kernel: RAX: 0000000000000000 RBX: ffff9efd5f89b4e0 RCX: 0000000000000000
mai 09 13:51:59 fedora kernel: RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9efd0d720000
mai 09 13:51:59 fedora kernel: RBP: 0000000000000000 R08: ffffc0c581bf7b48 R09: 0000000000000009
mai 09 13:51:59 fedora kernel: R10: ffff9efd00ff2800 R11: ffff9efd05b44840 R12: ffff9efd5f89b4e0
mai 09 13:51:59 fedora kernel: R13: 0000000000000000 R14: ffff9efd1dc264f8 R15: ffff9efd1dc26570
mai 09 13:51:59 fedora kernel: FS:  00007f5338e53fc0(0000) GS:ffff9f045dc00000(0000) knlGS:0000000000000000
mai 09 13:51:59 fedora kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033

I also tried replacing Nouveau with the proprietary Nvidia driver, and experienced a different issue. With the proprietary driver I still get a black screen in sddm, but I can move the cursor and switch tty. From a tty I can manually start plasmashell.

When using proprietary driver, sddm-greeter experiences a core dump:

mai 11 15:37:47 fedora systemd-coredump[1758]: [🡕] Process 1686 (sddm-greeter) of user 982 dumped core.

Module linux-vdso.so.1 with build-id 1b29ff114d30e41b5ec9d9cdf4fd690d9ad61f7f
Module libqmlfolderlistmodelplugin.so with build-id 144607d84fbc0172c7f34737379c0bce04f36943
                                               Stack trace of thread 1756:
                                               #0  0x00007f7bce7d11b8 blorp_exec_3d (iris_dri.so + 0xd071b8)
                                               #1  0x00007f7bce7d1e59 iris_blorp_exec (iris_dri.so + 0xd07e59)
                                               #2  0x00007f7bce970b0e blorp_clear (iris_dri.so + 0xea6b0e)
                                               #3  0x00007f7bce7ab5c5 clear_color (iris_dri.so + 0xce15c5)
                                               #4  0x00007f7bce7abdae iris_clear (iris_dri.so + 0xce1dae)
                                               #5  0x00007f7bce0ce953 tc_call_clear (iris_dri.so + 0x604953)
                                               #6  0x00007f7bce0cece9 tc_batch_execute (iris_dri.so + 0x604ce9)
                                               #7  0x00007f7bce0cfa46 _tc_sync.constprop.0 (iris_dri.so + 0x605a46)
                                               #8  0x00007f7bce0d54a7 tc_texture_subdata (iris_dri.so + 0x60b4a7)
                                               #9  0x00007f7bcdc3f5fa st_TexSubImage (iris_dri.so + 0x1755fa)
                                               #10 0x00007f7bcdc400e0 st_TexImage (iris_dri.so + 0x1760e0)
                                               #11 0x00007f7bcdc0603b teximage_err (iris_dri.so + 0x13c03b)
                                               #12 0x00007f7bcdc08495 _mesa_TexImage2D (iris_dri.so + 0x13e495)
                                               #13 0x00007f7be22856ae _ZN22QOpenGLTextureUploader12textureImageEjRK6QImage6QFlagsINS_10BindOptionEE5QSiz>
                                               #14 0x00007f7be2dbf518 _ZN15QSGPlainTexture4bindEv (libQt5Quick.so.5 + 0x1fa518)
                                               #15 0x00007f7be2dc1ae4 _ZN30QSGOpaqueTextureMaterialShader11updateStateERKN17QSGMaterialShader11RenderSta>
                                               #16 0x00007f7be2daa31d _ZN16QSGBatchRenderer8Renderer17renderMergedBatchEPKNS_5BatchE (libQt5Quick.so.5 +>
                                               #17 0x00007f7be2daf695 _ZN16QSGBatchRenderer8Renderer13renderBatchesEv (libQt5Quick.so.5 + 0x1ea695)
                                               #18 0x00007f7be2daff46 _ZN16QSGBatchRenderer8Renderer6renderEv (libQt5Quick.so.5 + 0x1eaf46)
                                               #19 0x00007f7be2d97994 _ZN11QSGRenderer11renderSceneERK11QSGBindable (libQt5Quick.so.5 + 0x1d2994)
                                               #20 0x00007f7be2d97e33 _ZN11QSGRenderer11renderSceneEj (libQt5Quick.so.5 + 0x1d2e33)
                                               #21 0x00007f7be2dfbba5 _ZN23QSGDefaultRenderContext15renderNextFrameEP11QSGRendererj (libQt5Quick.so.5 + >
                                               #22 0x00007f7be2e69809 _ZN19QQuickWindowPrivate16renderSceneGraphERK5QSizeS2_ (libQt5Quick.so.5 + 0x2a480>
                                               #23 0x00007f7be2e09b93 _ZN15QSGRenderThread13syncAndRenderEP6QImage (libQt5Quick.so.5 + 0x244b93)
                                               #24 0x00007f7be2e0a86b _ZN15QSGRenderThread3runEv (libQt5Quick.so.5 + 0x24586b)
                                               #25 0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #26 0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #27 0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1693:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b3050 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x90050)
                                               #2  0x00007f7bcdb8864b util_queue_thread_func (iris_dri.so + 0xbe64b)
                                               #3  0x00007f7bcdb8829b impl_thrd_routine (iris_dri.so + 0xbe29b)
                                               #4  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #5  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1688:
                                               #0  0x00007f7be152c64f __poll (libc.so.6 + 0x10964f)
                                               #1  0x00007f7be03440dd g_main_context_iterate.constprop.0 (libglib-2.0.so.0 + 0xaa0dd)
                                               #2  0x00007f7be02ec8e0 g_main_context_iteration (libglib-2.0.so.0 + 0x528e0)
                                               #3  0x00007f7be1b70c8a _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagE>
                                               #4  0x00007f7be1b1eb7a _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2a6b7a)
                                               #5  0x00007f7be195f4da _ZN7QThread4execEv (libQt5Core.so.5 + 0xe74da)
                                               #6  0x00007f7bd0939aeb _ZN22QDBusConnectionManager3runEv (libQt5DBus.so.5 + 0x1baeb)
                                               #7  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #8  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #9  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1697:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b3050 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x90050)
                                               #2  0x00007f7bcdb8864b util_queue_thread_func (iris_dri.so + 0xbe64b)
                                               #3  0x00007f7bcdb8829b impl_thrd_routine (iris_dri.so + 0xbe29b)
                                               #4  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #5  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1694:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b3050 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x90050)
                                               #2  0x00007f7bcdb8864b util_queue_thread_func (iris_dri.so + 0xbe64b)
                                               #3  0x00007f7bcdb8829b impl_thrd_routine (iris_dri.so + 0xbe29b)
                                               #4  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #5  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1692:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b3050 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x90050)
                                               #2  0x00007f7bcdb8864b util_queue_thread_func (iris_dri.so + 0xbe64b)
                                               #3  0x00007f7bcdb8829b impl_thrd_routine (iris_dri.so + 0xbe29b)
                                               #4  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #5  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1691:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b3050 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x90050)
                                               #2  0x00007f7bcdb8864b util_queue_thread_func (iris_dri.so + 0xbe64b)
                                               #3  0x00007f7bcdb8829b impl_thrd_routine (iris_dri.so + 0xbe29b)
                                               #4  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #5  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1698:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b3050 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x90050)
                                               #2  0x00007f7bcdb8864b util_queue_thread_func (iris_dri.so + 0xbe64b)
                                               #3  0x00007f7bcdb8829b impl_thrd_routine (iris_dri.so + 0xbe29b)
                                               #4  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #5  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1696:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b3050 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x90050)
                                               #2  0x00007f7bcdb8864b util_queue_thread_func (iris_dri.so + 0xbe64b)
                                               #3  0x00007f7bcdb8829b impl_thrd_routine (iris_dri.so + 0xbe29b)
                                               #4  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #5  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1695:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b3050 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x90050)
                                               #2  0x00007f7bcdb8864b util_queue_thread_func (iris_dri.so + 0xbe64b)
                                               #3  0x00007f7bcdb8829b impl_thrd_routine (iris_dri.so + 0xbe29b)
                                               #4  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #5  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1747:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b334d pthread_cond_timedwait@@GLIBC_2.3.2 (libc.so.6 + 0x9034d)
                                               #2  0x00007f7be196612a _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5 + 0xee12a)
                                               #3  0x00007f7be19639bc _ZN17QThreadPoolThread3runEv (libQt5Core.so.5 + 0xeb9bc)
                                               #4  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #5  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #6  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1745:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b334d pthread_cond_timedwait@@GLIBC_2.3.2 (libc.so.6 + 0x9034d)
                                               #2  0x00007f7be196612a _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5 + 0xee12a)
                                               #3  0x00007f7be19639bc _ZN17QThreadPoolThread3runEv (libQt5Core.so.5 + 0xeb9bc)
                                               #4  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #5  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #6  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1700:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b3050 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x90050)
                                               #2  0x00007f7bcdb8864b util_queue_thread_func (iris_dri.so + 0xbe64b)
                                               #3  0x00007f7bcdb8829b impl_thrd_routine (iris_dri.so + 0xbe29b)
                                               #4  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #5  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1748:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b334d pthread_cond_timedwait@@GLIBC_2.3.2 (libc.so.6 + 0x9034d)
                                               #2  0x00007f7be196612a _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5 + 0xee12a)
                                               #3  0x00007f7be19639bc _ZN17QThreadPoolThread3runEv (libQt5Core.so.5 + 0xeb9bc)
                                               #4  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #5  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #6  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1746:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b334d pthread_cond_timedwait@@GLIBC_2.3.2 (libc.so.6 + 0x9034d)
                                               #2  0x00007f7be196612a _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5 + 0xee12a)
                                               #3  0x00007f7be19639bc _ZN17QThreadPoolThread3runEv (libQt5Core.so.5 + 0xeb9bc)
                                               #4  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #5  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #6  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1749:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b334d pthread_cond_timedwait@@GLIBC_2.3.2 (libc.so.6 + 0x9034d)
                                               #2  0x00007f7be196612a _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5 + 0xee12a)
                                               #3  0x00007f7be19639bc _ZN17QThreadPoolThread3runEv (libQt5Core.so.5 + 0xeb9bc)
                                               #4  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #5  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #6  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1753:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b334d pthread_cond_timedwait@@GLIBC_2.3.2 (libc.so.6 + 0x9034d)
                                               #2  0x00007f7be196612a _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5 + 0xee12a)
                                               #3  0x00007f7be19639bc _ZN17QThreadPoolThread3runEv (libQt5Core.so.5 + 0xeb9bc)
                                               #4  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #5  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #6  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1750:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b334d pthread_cond_timedwait@@GLIBC_2.3.2 (libc.so.6 + 0x9034d)
                                               #2  0x00007f7be196612a _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5 + 0xee12a)
                                               #3  0x00007f7be19639bc _ZN17QThreadPoolThread3runEv (libQt5Core.so.5 + 0xeb9bc)
                                               #4  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #5  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #6  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1743:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b334d pthread_cond_timedwait@@GLIBC_2.3.2 (libc.so.6 + 0x9034d)
                                               #2  0x00007f7be196612a _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5 + 0xee12a)
                                               #3  0x00007f7be19639bc _ZN17QThreadPoolThread3runEv (libQt5Core.so.5 + 0xeb9bc)
                                               #4  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #5  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #6  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1751:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b334d pthread_cond_timedwait@@GLIBC_2.3.2 (libc.so.6 + 0x9034d)
                                               #2  0x00007f7be196612a _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5 + 0xee12a)
                                               #3  0x00007f7be19639bc _ZN17QThreadPoolThread3runEv (libQt5Core.so.5 + 0xeb9bc)
                                               #4  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #5  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #6  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1742:
                                               #0  0x00007f7be152c64f __poll (libc.so.6 + 0x10964f)
                                               #1  0x00007f7be03440dd g_main_context_iterate.constprop.0 (libglib-2.0.so.0 + 0xaa0dd)
                                               #2  0x00007f7be02ec8e0 g_main_context_iteration (libglib-2.0.so.0 + 0x528e0)
                                               #3  0x00007f7be1b70c8a _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagE>
                                               #4  0x00007f7be1b1eb7a _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2a6b7a)
                                               #5  0x00007f7be195f4da _ZN7QThread4execEv (libQt5Core.so.5 + 0xe74da)
                                               #6  0x00007f7be2d550aa _ZN18QQuickPixmapReader3runEv (libQt5Quick.so.5 + 0x1900aa)
                                               #7  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #8  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #9  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1744:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b334d pthread_cond_timedwait@@GLIBC_2.3.2 (libc.so.6 + 0x9034d)
                                               #2  0x00007f7be196612a _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5 + 0xee12a)
                                               #3  0x00007f7be19639bc _ZN17QThreadPoolThread3runEv (libQt5Core.so.5 + 0xeb9bc)
                                               #4  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #5  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #6  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1755:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b3050 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x90050)
                                               #2  0x00007f7bcdb8864b util_queue_thread_func (iris_dri.so + 0xbe64b)
                                               #3  0x00007f7bcdb8829b impl_thrd_routine (iris_dri.so + 0xbe29b)
                                               #4  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #5  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1752:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b334d pthread_cond_timedwait@@GLIBC_2.3.2 (libc.so.6 + 0x9034d)
                                               #2  0x00007f7be196612a _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5 + 0xee12a)
                                               #3  0x00007f7be19639bc _ZN17QThreadPoolThread3runEv (libQt5Core.so.5 + 0xeb9bc)
                                               #4  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #5  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #6  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1704:
                                               #0  0x00007f7be152f001 pselect (libc.so.6 + 0x10c001)
                                               #1  0x00007f7b8b1b7000 usbmuxd_listen_inotify (libusbmuxd-2.0.so.6 + 0x4000)
                                               #2  0x00007f7b8b1b7c8b device_monitor (libusbmuxd-2.0.so.6 + 0x4c8b)
                                               #3  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #4  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1686:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b3050 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x90050)
                                               #2  0x00007f7be19661bc _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5 + 0xee1bc)
                                               #3  0x00007f7be2e0c65c _ZN21QSGThreadedRenderLoop13polishAndSyncEPNS_6WindowEb (libQt5Quick.so.5 + 0x2476>
                                               #4  0x00007f7be2e0d320 _ZN21QSGThreadedRenderLoop14handleExposureEP12QQuickWindow (libQt5Quick.so.5 + 0x2>
                                               #5  0x00007f7be1f7b715 _ZN7QWindow5eventEP6QEvent (libQt5Gui.so.5 + 0x175715)
                                               #6  0x00007f7be1b20118 _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5 + 0x2a81>
                                               #7  0x00007f7be1f713c5 _ZN22QGuiApplicationPrivate18processExposeEventEPN29QWindowSystemInterfacePrivate1>
                                               #8  0x00007f7be1f4ff7c _ZN22QWindowSystemInterface22sendWindowSystemEventsE6QFlagsIN10QEventLoop17Process>
                                               #9  0x00007f7bd0a71a7e _ZL17xcbSourceDispatchP8_GSourcePFiPvES1_ (libQt5XcbQpa.so.5 + 0x6ea7e)
                                               #10 0x00007f7be02eef4f g_main_context_dispatch (libglib-2.0.so.0 + 0x54f4f)
                                               #11 0x00007f7be0344168 g_main_context_iterate.constprop.0 (libglib-2.0.so.0 + 0xaa168)
                                               #12 0x00007f7be02ec8e0 g_main_context_iteration (libglib-2.0.so.0 + 0x528e0)
                                               #13 0x00007f7be1b70c8a _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagE>
                                               #14 0x00007f7be1b1eb7a _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2a6b7a)
                                               #15 0x00007f7be1b26c22 _ZN16QCoreApplication4execEv (libQt5Core.so.5 + 0x2aec22)
                                               #16 0x000055a80e8eb33b main (sddm-greeter + 0x1c33b)
                                               #17 0x00007f7be1450590 __libc_start_call_main (libc.so.6 + 0x2d590)
                                               #18 0x00007f7be1450649 __libc_start_main@@GLIBC_2.34 (libc.so.6 + 0x2d649)
                                               #19 0x000055a80e8ecd45 _start (sddm-greeter + 0x1dd45)

                                               Stack trace of thread 1687:
                                               #0  0x00007f7be152c64f __poll (libc.so.6 + 0x10964f)
                                               #1  0x00007f7be2ba6fba _xcb_conn_wait.part.0 (libxcb.so.1 + 0xdfba)
                                               #2  0x00007f7be2ba894c xcb_wait_for_event (libxcb.so.1 + 0xf94c)
                                               #3  0x00007f7bd0a70a91 _ZN14QXcbEventQueue3runEv (libQt5XcbQpa.so.5 + 0x6da91)
                                               #4  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #5  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #6  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1699:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b3050 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x90050)
                                               #2  0x00007f7bcdb8864b util_queue_thread_func (iris_dri.so + 0xbe64b)
                                               #3  0x00007f7bcdb8829b impl_thrd_routine (iris_dri.so + 0xbe29b)
                                               #4  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #5  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1702:
                                               #0  0x00007f7be152c64f __poll (libc.so.6 + 0x10964f)
                                               #1  0x00007f7be03440dd g_main_context_iterate.constprop.0 (libglib-2.0.so.0 + 0xaa0dd)
                                               #2  0x00007f7be02ec8e0 g_main_context_iteration (libglib-2.0.so.0 + 0x528e0)
                                               #3  0x00007f7be1b70c8a _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagE>
                                               #4  0x00007f7be1b1eb7a _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2a6b7a)
                                               #5  0x00007f7be195f4da _ZN7QThread4execEv (libQt5Core.so.5 + 0xe74da)
                                               #6  0x00007f7be293e7d9 _ZN17QQmlThreadPrivate3runEv (libQt5Qml.so.5 + 0x3497d9)
                                               #7  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #8  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #9  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)

                                               Stack trace of thread 1754:
                                               #0  0x00007f7be14b08f9 __futex_abstimed_wait_common (libc.so.6 + 0x8d8f9)
                                               #1  0x00007f7be14b334d pthread_cond_timedwait@@GLIBC_2.3.2 (libc.so.6 + 0x9034d)
                                               #2  0x00007f7be196612a _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5 + 0xee12a)
                                               #3  0x00007f7be19639bc _ZN17QThreadPoolThread3runEv (libQt5Core.so.5 + 0xeb9bc)
                                               #4  0x00007f7be19607d7 _ZN14QThreadPrivate5startEPv (libQt5Core.so.5 + 0xe87d7)
                                               #5  0x00007f7be14b3cc7 start_thread (libc.so.6 + 0x90cc7)
                                               #6  0x00007f7be1538e00 __clone3 (libc.so.6 + 0x115e00)
                                               ELF object binary architecture: AMD x86-64

Now it works as expected with the proprietary driver.
I made these changes:

Edited /etc/X11/xorg.conf.d/nvidia.conf

Section "ServerLayout"
        Identifier "layout"
        Screen 0 "intel"
       	Inactive "nvidia"
       	Option "AllowNVIDIAGPUScreens"
EndSection

Section "Device"
       	Identifier "intel"
       	Driver "modesetting"
       	BusID "PCI:0@0:2:0"
EndSection

Section "Device"
       	Identifier "nvidia"
       	Driver "nvidia"
       	BusID "PCI:1@0:0:0"
       	Option "ConstrainCursor" "off"
       	Option "coolbits" "28"
EndSection


Section "Screen"
       	Identifier "intel"
       	Device "intel"
EndSection


Section "Screen"
       	Identifier "nvidia"
       	Device "nvidia"
EndSection

Added this kernel parameter: dev.i915.perf_stream_paranoid=0

I want to run the open-source graphics driver, so I’m not marking this as a solution