Update changes wayland into x11

A new update of the system changes my windowing system from wayland into x11. What the problem?

The updated software are
cpp-10.0.1-0.14.fc32.x86_64
f32-backgrounds-base-32.2.2-1.fc32.noarch
f32-backgrounds-gnome-32.2.2-1.fc32.noarch
firefox-76.0-2.fc32.x86_64
gcc-10.0.1-0.14.fc32.x86_64
gcc-c+±10.0.1-0.14.fc32.x86_64
gcc-gdb-plugin-10.0.1-0.14.fc32.x86_64
gcc-gfortran-10.0.1-0.14.fc32.x86_64
gdm-1:3.36.2-2.fc32.x86_64
gnupg2-2.2.20-2.fc32.x86_64
gnupg2-smime-2.2.20-2.fc32.x86_64
hwdata-0.335-1.fc32.noarch
java-1.8.0-openjdk-1:1.8.0.252.b09-0.fc32.x86_64
java-1.8.0-openjdk-headless-1:1.8.0.252.b09-0.fc32.x86_64
libgcc-10.0.1-0.14.fc32.i686
libgcc-10.0.1-0.14.fc32.x86_64
libgfortran-10.0.1-0.14.fc32.x86_64
libgomp-10.0.1-0.14.fc32.x86_64
libquadmath-10.0.1-0.14.fc32.x86_64
libquadmath-devel-10.0.1-0.14.fc32.x86_64
libstdc+±10.0.1-0.14.fc32.i686
libstdc+±10.0.1-0.14.fc32.x86_64
libstdc+±devel-10.0.1-0.14.fc32.x86_64
nss-3.51.1-1.fc32.x86_64
nss-softokn-3.51.1-1.fc32.x86_64
nss-softokn-freebl-3.51.1-1.fc32.x86_64
nss-sysinit-3.51.1-1.fc32.x86_64
nss-util-3.51.1-1.fc32.x86_64
perl-Encode-4:3.06-445.fc32.x86_64
perl-encoding-4:3.00-445.fc32.x86_64
pipewire-0.3.4-2.fc32.x86_64
pipewire-libs-0.3.4-2.fc32.x86_64

I’ve not seen my system change due to an update. What happens if you select “Gnome” when logging in?

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Hello when will be wayland available for KDE plasma? i am on x11 f32

Please start a new topic @zarathustra19, we’d like to keep each topic focused on the original question :slight_smile:

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Yes, I selected ‘Gnome’ when logging in. There is only one more selection, ‘Classical Gnome’. It seems that there were three options before the update.

A downgrade of all the packages listed above couldn’t resolve the problem. The windowing system remained X11.

The “Gnome” option is Gnome on Wayland. To use Gnome with X, one needs to select the “Gnome on Xorg” option.

Only gdm from this list of packages is related here. Instead of downgrading, how about we look at the logs? Please update your system again, create a new user, and login using the default “gnome” option. Does that still result in X?

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The new user login still results in X. There are three desktops in /usr/share/xssessions/, gnome-classic, gnome, and gnome-xorg. But there are only two options when logging in, gnome and gnome-classic.

Which log file(s) do you want to see in order to find the information on the disappearance of wayland.

Well, the logs after you’ve logged in would be good for a start. We need to see why it’s using X instead of Wayland. (Wayland hasn’t “disappeared”, but it’s possible that it’s failing to load and is using X as fallback. We need more information before we can diagnose the issue.)

What would be the output of systemctl list-units|grep -E – ‘gdm|sddm|lxdm|lightdm|kdm|xdm’

If you use lightdm, I think you may try with gdm…
https://www.if-not-true-then-false.com/2018/fedora-switch-display-manager/

Here are some logs.

Important:
09:20:34 kernel: pcieport 0000:04:01.0: can’t change power state from D3cold to D0 (config space inaccessible)
09:20:34 kernel: xhci_hcd 0000:3b:00.0: xHCI host controller not responding, assume dead
09:19:52 systemd: Failed to start Tracker metadata database store and lookup manager.
09:19:46 gdm-session-wor: gkr-pam: unable to locate daemon control file
09:19:42 dbus-broker-lau: Activation request for ‘org.a11y.atspi.Registry’ failed.
09:19:42 bluetoothd: Failed to set mode: Blocked through rfkill (0x12)
09:19:42 dbus-broker-lau: Activation request for ‘org.a11y.atspi.Registry’ failed.
09:19:38 systemd: Failed to start Network Manager Wait Online.

System:
09:21:21 kernel: nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead.
09:20:35 kernel: pci_bus 0000:04: busn_res: [bus 04-3b] is released
09:20:34 kernel: pcieport 0000:04:01.0: can’t change power state from D3cold to D0 (config space inaccessible)
09:20:34 kernel: xhci_hcd 0000:3b:00.0: USB bus 3 deregistered
09:20:34 kernel: usb usb3: USB disconnect, device number 1
09:20:34 kernel: xhci_hcd 0000:3b:00.0: remove, state 4
09:20:34 kernel: usb usb4: USB disconnect, device number 1
09:20:34 kernel: xhci_hcd 0000:3b:00.0: remove, state 4
09:20:34 kernel: pcieport 0000:00:1d.0: pciehp: Slot(8): Card not present
09:19:53 kernel: pci_bus 0000:3b: Allocating resources
09:19:53 kernel: thunderbolt 0000:05:00.0: enabling device (0000 -> 0002)
09:19:53 kernel: hub 4-0:1.0: 2 ports detected
09:19:53 kernel: usb usb4: SerialNumber: 0000:3b:00.0
09:19:53 kernel: xhci_hcd 0000:3b:00.0: Host supports USB 3.1 Enhanced SuperSpeed
09:19:53 kernel: hub 3-0:1.0: 2 ports detected
09:19:53 kernel: usb usb3: SerialNumber: 0000:3b:00.0
09:19:53 kernel: xhci_hcd 0000:3b:00.0: hcc params 0x200077c1 hci version 0x110 quirks 0x0000000000009810
09:19:53 kernel: pci 0000:3b:00.0: enabling device (0000 -> 0002)
09:19:53 kernel: pcieport 0000:04:02.0: enabling device (0000 -> 0002)
09:19:53 kernel: pci 0000:03:00.0: bridge window [mem 0x2fd0000000-0x2ff1ffffff 64bit pref]
09:19:53 kernel: PCI: No. 2 try to assign unassigned res
09:19:53 kernel: pcieport 0000:00:1d.0: bridge window [mem 0x2fd0000000-0x2ff1ffffff 64bit pref]
09:19:53 kernel: pci 0000:03:00.0: bridge window [mem 0x2fd0000000-0x2ff1ffffff 64bit pref]
09:19:53 kernel: pci_bus 0000:04: busn_res: [bus 04-3b] end is updated to 3b
09:19:53 kernel: pci 0000:04:02.0: bridge window [mem 0x00000000-0x000fffff 64bit pref]
09:19:53 kernel: pci_bus 0000:06: busn_res: [bus 06-3b] end is updated to 3a
09:19:53 kernel: pci 0000:04:01.0: bridge window [mem 0x00000000-0x000fffff 64bit pref]
09:19:53 kernel: pci_bus 0000:05: busn_res: [bus 05-3b] end is updated to 05
09:19:53 kernel: pci 0000:04:00.0: bridge window [mem 0x00000000-0x000fffff 64bit pref]
09:19:53 kernel: pcieport 0000:00:1d.0: pciehp: Slot(8): Card present
09:19:50 kernel: rfkill: input handler disabled
09:19:48 kernel: Bluetooth: RFCOMM ver 1.11
09:19:47 kernel: rfkill: input handler enabled
09:19:40 kernel: [drm] Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.
09:19:40 kernel: IPv6: ADDRCONF(NETDEV_CHANGE): wlp60s0: link becomes ready
09:19:40 kernel: wlp60s0: Limiting TX power to 37 (40 - 3) dBm as advertised by 60:3a:7c:5c:2c:f0
09:19:35 kernel: iwlwifi 0000:3c:00.0: FW already configured (0) - re-configuring
09:19:34 kernel: Bluetooth: BNEP socket layer initialized
09:19:34 kernel: RPC: Registered tcp NFSv4.1 backchannel transport module.
09:19:34 kernel: EXT4-fs (dm-3): mounted filesystem with ordered data mode. Opts: (null)
09:19:34 kernel: ext4 filesystem being mounted at /boot supports timestamps until 2038 (0x7fffffff)
09:19:34 kernel: EXT4-fs (nvme0n1p8): mounted filesystem with ordered data mode. Opts: (null)
09:19:34 kernel: audit: type=1130 audit(1588987174.033:95): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg=‘unit=systemd-fsck@dev-mapper-fedora_localhost\x2d\x2dlive\x2dhome comm=“systemd” exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success’
09:19:33 kernel: iwlwifi 0000:3c:00.0 wlp60s0: renamed from wlan0
09:19:32 kernel: mei_hdcp 0000:00:16.0-b638ab7e-94e2-4ea2-a552-d1c54b627f04: bound 0000:00:02.0 (ops i915_hdcp_component_ops [i915])
09:19:31 kernel: iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
09:19:31 kernel: iTCO_vendor_support: vendor-support=0
09:19:31 kernel: intel_rapl_common: Found RAPL domain dram
09:19:30 kernel: [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:01:00.0 on minor 1
09:19:29 kernel: audit: type=1130 audit(1588987169.985:86): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg=‘unit=lvm2-monitor comm=“systemd” exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success’
09:19:29 kernel: kauditd_printk_skb: 29 callbacks suppressed
09:19:29 kernel: RAPL PMU: hw unit of domain pp1-gpu 2^-14 Joules
09:19:29 kernel: battery: new extension: Huawei Battery Extension
09:19:29 kernel: input: Huawei WMI hotkeys as /devices/platform/huawei-wmi/input/input25
09:19:29 kernel: thermal thermal_zone11: failed to read out thermal zone (-61)
09:19:29 kernel: ieee80211 phy0: Selected rate control algorithm ‘iwl-mvm-rs’
09:19:29 kernel: input: PC Speaker as /devices/platform/pcspkr/input/input24
09:19:29 kernel: iwlwifi 0000:3c:00.0: base HW address: 38:37:8b:ee:03:bc
09:19:29 kernel: ACPI Warning: _SB.PCI0.RP01.PXSX._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20200110/nsarguments-59)
09:19:29 kernel: iwlwifi 0000:3c:00.0: Allocated 0x00400000 bytes for firmware monitor.
09:19:29 kernel: [drm] [nvidia-drm] [GPU ID 0x00000100] Loading driver
09:19:29 kernel: nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms 440.82 Wed Apr 1 19:41:29 UTC 2020
09:19:29 kernel: nvidia-uvm: Loaded the UVM driver, major device number 511.
09:19:29 kernel: NVRM: loading NVIDIA UNIX x86_64 Kernel Module 440.82 Wed Apr 1 20:04:33 UTC 2020
09:19:29 kernel: USB Video Class driver (1.1.1)
09:19:29 kernel: usbcore: registered new interface driver uvcvideo
09:19:29 kernel: input: HD Camera: HD Camera as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/input/input23
09:19:29 kernel: uvcvideo 1-7:1.0: Entity type for entity Camera 1 was not initialized!
09:19:29 kernel: uvcvideo: Found UVC 1.00 device HD Camera (05c8:03c0)
09:19:29 kernel: Bluetooth: hci0: Firmware revision 0.1 build 50 week 12 2019
09:19:29 kernel: usbcore: registered new interface driver btusb
09:19:29 kernel: iwlwifi 0000:3c:00.0: loaded firmware version 36.77d01142.0 8265-36.ucode op_mode iwlmvm
09:19:29 kernel: Copyright© 2003- 2015 Intel Corporation
09:19:29 kernel: Intel® Wireless WiFi driver for Linux
09:19:29 kernel: Bluetooth: SCO socket layer initialized
09:19:29 kernel: NET: Registered protocol family 31
09:19:29 kernel: Bluetooth: Core ver 2.22
09:19:29 kernel: videodev: Linux video capture interface: v2.00
09:19:29 kernel: cfg80211: Loaded X.509 cert ‘sforshee: 00b28ddf47aef9cea7’
09:19:29 kernel: mc: Linux media interface: v0.10
09:19:29 kernel: nvidia 0000:01:00.0: enabling device (0406 -> 0407)
09:19:29 kernel: nvidia-nvlink: Nvlink Core is being initialized, major device number 236
09:19:29 kernel: nvidia: module verification failed: signature and/or required key missing - tainting kernel
09:19:29 kernel: Disabling lock debugging due to kernel taint
09:19:29 kernel: nvidia: module license ‘NVIDIA’ taints kernel.
09:19:29 kernel: ipmi device interface
09:19:29 kernel: IPMI message handler: version 39.2
09:19:28 kernel: idma64 idma64.3: Found Intel integrated DMA 64-bit
09:19:27 kernel: input: HDA Intel PCH HDMI/DP,pcm=10 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input22
09:19:27 kernel: snd_hda_codec_realtek hdaudioC0D0: Internal Mic=0x12
09:19:27 kernel: snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
09:19:27 kernel: i801_smbus 0000:00:1f.4: SMBus using PCI interrupt
09:19:27 kernel: mei_me 0000:00:16.0: enabling device (0004 -> 0006)
09:19:27 kernel: proc_thermal 0000:00:04.0: Creating sysfs group for PROC_THERMAL_PCI
09:19:27 kernel: intel_rapl_common: Found RAPL domain dram
09:19:25 kernel: Started Journal Service.
09:19:25 kernel: Starting udev Wait for Complete Device Initialization…
09:19:25 kernel: Finished udev Coldplug all Devices.
09:19:25 kernel: Starting udev Kernel Device Manager…
09:19:25 kernel: Finished Create Static Device Nodes in /dev.
09:19:25 kernel: Mounted Temporary Directory (/tmp).
09:19:25 kernel: Starting Create Static Device Nodes in /dev…
09:19:25 kernel: Condition check resulted in Create System Users being skipped.
09:19:25 kernel: Starting Apply Kernel Variables…
09:19:25 kernel: Condition check resulted in Rebuild Hardware Database being skipped.
09:19:25 kernel: Mounting Temporary Directory (/tmp)…
09:19:25 kernel: tmp.mount: Directory /tmp to mount over is not empty, mounting anyway.
09:19:25 kernel: Mounting FUSE Control File System…
09:19:25 kernel: Reached target Swap.
09:19:25 kernel: Finished Repartition Root Disk.
09:19:25 kernel: nfs-convert.service: Succeeded.
09:19:25 kernel: Finished Create list of static device nodes for the current kernel.
09:19:25 kernel: Mounted Kernel Trace File System.
09:19:25 kernel: EXT4-fs (dm-0): re-mounted. Opts: (null)
09:19:25 kernel: Mounted Huge Pages File System.
09:19:25 kernel: Activated swap /dev/mapper/fedora_localhost–live-swap.
09:19:25 kernel: Adding 7815164k swap on /dev/mapper/fedora_localhost–live-swap. Priority:-2 extents:1 across:7815164k SSFS
09:19:25 kernel: sysroot.mount: Succeeded.
09:19:25 kernel: Starting udev Coldplug all Devices…
09:19:25 kernel: Stopped Journal Service.
09:19:25 kernel: Condition check resulted in Set Up Additional Binary Formats being skipped.
09:19:25 kernel: Stopped Plymouth switch root service.
09:19:25 kernel: plymouth-switch-root.service: Succeeded.
09:19:25 kernel: Starting Preprocess NFS configuration convertion…
09:19:25 kernel: Condition check resulted in Load Kernel Module drm being skipped.
09:19:25 kernel: Starting Monitoring of LVM2 mirrors, snapshots etc. using dmeventd or progress polling…
09:19:25 kernel: Condition check resulted in Kernel Module supporting RPCSEC_GSS being skipped.
09:19:25 kernel: Mounting Kernel Trace File System…
09:19:25 kernel: Activating swap /dev/mapper/fedora_localhost–live-swap…
09:19:25 kernel: Listening on User Database Manager Socket.
09:19:25 kernel: Reached target Slices.
09:19:25 kernel: Stopped target Initrd Root File System.
09:19:25 kernel: Reached target Login Prompts.
09:19:25 kernel: Set up automount Arbitrary Executable File Formats File System Automount Point.
09:19:25 kernel: Started Forward Password Requests to Wall Directory Watch.
09:19:25 kernel: Condition check resulted in Dispatch Password Requests to Console Directory Watch being skipped.
09:19:25 kernel: Created slice User and Session Slice.
09:19:25 kernel: systemd-journald.service: Scheduled restart job, restart counter is at 1.
09:19:25 kernel: audit: type=1334 audit(1588987165.120:56): prog-id=15 op=UNLOAD
09:19:25 kernel: Stopped Switch Root.
09:19:25 kernel: initrd-switch-root.service: Succeeded.
09:19:25 kernel: audit: type=1131 audit(1588987165.113:55): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg=‘unit=systemd-journald comm=“systemd” exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success’
09:19:25 kernel: Console: switching to colour frame buffer device 375x125
09:19:25 kernel: fbcon: Taking over console
09:19:25 kernel: /usr/lib/systemd/system/sssd-kcm.socket:7: ListenStream= references a path below legacy directory /var/run/, updating /var/run/.heim_org.h5l.kcm-socket → /run/.heim_org.h5l.kcm-socket; please update the unit file accordingly.
09:19:25 kernel: /usr/lib/systemd/system/sssd.service:13: PIDFile= references a path below legacy directory /var/run/, updating /var/run/sssd.pid → /run/sssd.pid; please update the unit file accordingly.
09:19:25 kernel: audit: type=1334 audit(1588987164.901:51): prog-id=14 op=UNLOAD
09:19:25 kernel: Set hostname to .
09:19:25 kernel: Detected architecture x86-64.
09:19:25 kernel: systemd v245.4-1.fc32 running in system mode. (+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN2 -IDN +PCRE2 default-hierarchy=unified)
09:19:25 kernel: Relabelled /dev, /dev/shm, /run, /sys/fs/cgroup in 24.506ms.
09:19:25 kernel: RTC configured in localtime, applying delta of 480 minutes to system time.
09:19:25 kernel: Successfully loaded SELinux policy in 454.845ms.
09:19:25 kernel: audit: type=1403 audit(1589015964.817:47): auid=4294967295 ses=4294967295 lsm=selinux res=1
09:19:25 kernel: kauditd_printk_skb: 36 callbacks suppressed
09:19:25 kernel: SELinux: policy capability nnp_nosuid_transition=1
09:19:25 kernel: Received SIGTERM from PID 1 (systemd).

Here is the output of systemctl list-units | grep gdm,

82:  session-c1.scope                                                                                   loaded active running   Session c1 of user gdm                                                                      
106:  gdm.service                                                                                        loaded active running   GNOME Display Manager

The grepping of other options does not give any output.

You could check /etc/gdm/custom.conf file, make sure the line:
#WaylandEnable=false
have indeed the # to make it a comment

You could activate debug:
[debug]
# Uncomment the line below to turn on debugging
#Enable=true

And I think check the result with:
journalctl -u gdm.service -b 0 -o short-monotonic
for me this gives something like:

[35846.582269] localhost.localdomain gdm-password][10960]: GdmSessionWorker: state SESSION_OPENED
[35846.845599] localhost.localdomain gdm-password][10960]: GdmSessionWorker: Set PAM environment variable: 'LANG=fr_CA.utf8'
[35846.845881] localhost.localdomain gdm-password][10960]: GdmSessionWorker: Set PAM environment variable: 'XDG_CURRENT_DESKTOP=GNOME'
[35846.846026] localhost.localdomain gdm-password][10960]: GdmSessionWorker: Set PAM environment variable: 'GDMSESSION=gnome'
[35846.846178] localhost.localdomain gdm-password][10960]: GdmSessionWorker: Set PAM environment variable: 'GDM_LANG=fr_CA.utf8'
[35846.846280] localhost.localdomain gdm-password][10960]: GdmSessionWorker: Set PAM environment variable: 'DESKTOP_SESSION=gnome'
[35846.846401] localhost.localdomain gdm-password][10960]: GdmSessionWorker: Set PAM environment variable: 'XDG_SESSION_DESKTOP=gnome'
[35846.846501] localhost.localdomain gdm-password][10960]: GdmSessionWorker: start program: /usr/libexec/gdm-wayland-session "/usr/bin/gnome-session"
[35846.846600] localhost.localdomain gdm-password][10960]: GdmSessionWorker: attempting to change state to SESSION_STARTED
[35846.846705] localhost.localdomain gdm-password][10960]: GdmSessionWorker: opening user session with program '/usr/libexec/gdm-wayland-session'
[35846.846809] localhost.localdomain gdm-password][10960]: GdmSessionWorker: jumping to VT 2
1 Like

Here are the two outputs,

$ more /etc/gdm/custom.conf 
# GDM configuration storage

[daemon]
# Uncomment the line below to force the login screen to use Xorg
#WaylandEnable=false

[security]

[xdmcp]

[chooser]

[debug]
# Uncomment the line below to turn on debugging
#Enable=true


$ journalctl -u gdm.service -b 0 -o short-monotonic
-- Logs begin at Tue 2020-03-24 12:33:39 CST, end at Sat 2020-05-09 11:23:21 CST. --
[   18.815959] agn systemd[1]: Starting GNOME Display Manager...
[   18.827714] agn systemd[1]: Started GNOME Display Manager.
[   27.238665] agn gdm-password][1644]: gkr-pam: unable to locate daemon control file
[   27.243505] agn gdm-password][1644]: gkr-pam: stashed password to try later in open session
[ 1461.254505] agn gdm-password][3529]: gkr-pam: unable to locate daemon control file
[ 1461.255948] agn gdm-password][3529]: gkr-pam: stashed password to try later in open session

Well, to be usefull, you have to remove the # before Enable=true (I use sudo nano /etc/gdm/custom.conf … put use your favorite editor… maybe gedit)
then log-out, log-in,
then: journalctl -u gdm.service -b 0 -o short-monotonic

1 Like

Here is the output of the command you mentioned:

-- Logs begin at Tue 2020-03-24 12:33:39 CST, end at Sat 2020-05-09 12:02:42 CST. --
[   18.452701] agn systemd[1]: Starting GNOME Display Manager...
[   18.466020] agn gdm[1188]: Enabling debugging
[   18.467749] agn gdm[1188]: Changing user:group to gdm:gdm
[   18.470073] agn systemd[1]: Started GNOME Display Manager.
[   18.471941] agn gdm[1188]: Successfully connected to D-Bus
[   18.472031] agn gdm[1188]: GdmManager: GDM starting to manage displays
[   18.472104] agn gdm[1188]: GLib: posix_spawn avoided (fd close requested)
[   18.474468] agn gdm[1188]: GLib: posix_spawn avoided (fd close requested)
[   18.496763] agn gdm[1188]: GdmLocalDisplayFactory: enumerating seats from logind
[   18.497419] agn gdm[1188]: GdmLocalDisplayFactory: X11 login display for seat seat0 requested
[   18.497527] agn gdm[1188]: GdmLocalDisplayFactory: Adding display on seat seat0
[   18.497621] agn gdm[1188]: GdmDisplay: id: (null)
[   18.497677] agn gdm[1188]: GdmDisplay: seat id: (null)
[   18.497727] agn gdm[1188]: GdmDisplay: session class: greeter
[   18.497784] agn gdm[1188]: GdmDisplay: initial: no
[   18.497856] agn gdm[1188]: GdmDisplay: allow timed login: yes
[   18.497911] agn gdm[1188]: GdmDisplay: local: yes
[   18.497967] agn gdm[1188]: GdmDisplay: seat id: seat0
[   18.498025] agn gdm[1188]: GdmDisplay: initial: yes
[   18.498087] agn gdm[1188]: GdmDisplayStore: Adding display /org/gnome/DisplayManager/Displays/93940827195872 to store
[   18.498149] agn gdm[1188]: GdmDisplay: Managing display: /org/gnome/DisplayManager/Displays/93940827195872
[   18.498202] agn gdm[1188]: GdmDisplay: Preparing display: /org/gnome/DisplayManager/Displays/93940827195872
[   18.500131] agn gdm[1188]: GdmDisplay: Checking kernel command buffer BOOT_IMAGE=(hd0,gpt8)/vmlinuz-5.6.10-300.fc32.x86_64 root=/dev/mapper/fedora_localhost--liv>
[   18.500252] agn gdm[1188]: GdmDisplay: Failed to read kernel commandline: Could not match gnome.initial-setup= in kernel cmdline
[   18.500311] agn gdm[1188]: doing initial setup? no
[   18.500378] agn gdm[1188]: GdmDisplay: prepare display
[   18.500432] agn gdm[1188]: GdmDisplay: Got automatic login details for display: 0
[   18.500487] agn gdm[1188]: GLib: setenv()/putenv() are not thread-safe and should not be used after threads are created
[   18.500550] agn gdm[1188]: GdmSession: Creating D-Bus server for worker for session
[   18.500786] agn gdm[1188]: GdmSession: D-Bus server for workers listening on unix:abstract=/tmp/dbus-NHg2rvgD
[   18.500852] agn gdm[1188]: GdmSession: Creating D-Bus server for greeters and such for session (null) (0x55704da3f000)
[   18.500940] agn gdm[1188]: GdmSession: D-Bus server for greeters listening on unix:abstract=/tmp/dbus-hKPO3Gem
[   18.501002] agn gdm[1188]: GdmSession: Setting display device: (null)
[   18.501052] agn gdm[1188]: GdmSession: Created user session for user 42 on display /org/gnome/DisplayManager/Displays/93940827195872 (seat seat0)
[   18.501107] agn gdm[1188]: GdmDisplay: Running greeter
[   18.501167] agn gdm[1188]: GdmDisplay: Creating greeter for (null) (null)
[   18.501224] agn gdm[1188]: GdmLaunchEnvironment: Starting...
[   18.501285] agn gdm[1188]: GdmLaunchEnvironment: Setting up run time dir /run/gdm/greeter
[   18.501340] agn gdm[1188]: GLib: setenv()/putenv() are not thread-safe and should not be used after threads are created
[   18.501392] agn gdm[1188]: GdmSession: Creating D-Bus server for worker for session
[   18.501447] agn gdm[1188]: GdmSession: D-Bus server for workers listening on unix:abstract=/tmp/dbus-4o9sQQMa
[   18.501503] agn gdm[1188]: GdmSession: Creating D-Bus server for greeters and such for session (null) (0x55704da3f120)
[   18.501559] agn gdm[1188]: GdmSession: D-Bus server for greeters listening on unix:abstract=/tmp/dbus-PJH10eEG
[   18.501608] agn gdm[1188]: GdmSession: Setting display device: (null)
[   18.501667] agn gdm[1188]: GdmSession: starting conversation gdm-launch-environment for session (0x55704da3f120)
[   18.501746] agn gdm[1188]: GdmSessionWorkerJob: Starting worker...

The total output is more than 400 lines. I copied here only the first tens of lines.

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It does not seems to contains the interesting part.

I suggest you do:
journalctl -u gdm.service -b 0 -o short-monotonic --no-pager | fpaste
that will send it to a web server for 24 hours… and will generate a link you can copy here.

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I did as you suggested.

$ $ journalctl -u gdm.service -b 0 -o short-monotonic --no-pager | fpaste
Uploading (51.7KiB)...
https://paste.centos.org/view/07d32f1a
2 Likes

hum… you have:

XDG_CURRENT_DESKTOP=GNOME-Greeter:GNOME

where I have:

XDG_CURRENT_DESKTOP=GNOME

I should try to understand why…

Oh well ok, later you have:

[   30.895823] agn gdm-password][1646]: GdmSessionWorker: Set PAM environment variable: 'LANG=zh_CN.UTF-8'
[   30.895903] agn gdm-password][1646]: GdmSessionWorker: Set PAM environment variable: 'XDG_CURRENT_DESKTOP=GNOME'
[   30.895951] agn gdm-password][1646]: GdmSessionWorker: Set PAM environment variable: 'GDMSESSION=gnome'
[   30.895995] agn gdm-password][1646]: GdmSessionWorker: Set PAM environment variable: 'GDM_LANG=zh_CN.UTF-8'
[   30.896036] agn gdm-password][1646]: GdmSessionWorker: Set PAM environment variable: 'DESKTOP_SESSION=gnome'
[   30.896077] agn gdm-password][1646]: GdmSessionWorker: Set PAM environment variable: 'XDG_SESSION_DESKTOP=gnome'
[   30.896112] agn gdm-password][1646]: GdmSessionWorker: start program: /usr/libexec/gdm-x-session --run-script  "/usr/bin/gnome-session"
[   30.896162] agn gdm-password][1646]: GdmSessionWorker: attempting to change state to SESSION_STARTED
[   30.896210] agn gdm-password][1646]: GdmSessionWorker: opening user session with program '/usr/libexec/gdm-x-session'
[   30.896247] agn gdm-password][1646]: GdmSessionWorker: jumping to VT 2

which shows that indeed X is started… but not really explains why… still studying it

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