Problem Summary: Occasional loss of audio over HDMI that is restored only by unplugging the HDMI cable and plugging it back in. Problem can be recreated by running speaker test.
Hardware:
Framework Laptop, i7-1185G7, Mesa Intel® Xe Graphics (TGL GT2), Framework HDMI adapter
PCI bridge: Intel Corporation Tiger Lake-LP Thunderbolt 4 PCI Express Root Port
USB controller: Intel Corporation Tiger Lake-LP Thunderbolt 4 USB Controller (rev 01) (prog-if 30 [XHCI])
Audio device: Intel Corporation Tiger Lake-LP Smart Sound Technology Audio Controller (rev 20) (prog-if 80)
dmesg | grep -C1 -E 'ALSA|HDA|HDMI|snd[_-]|sound|hda.codec|hda.intel'
[ 0.127297] ACPI: Added _OSI(Linux-Dell-Video)
[ 0.127297] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[ 0.127297] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics)
--
[ 1.845092] usb 3-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1.845093] usb 3-6: Product: HDMI Expansion Card
[ 1.845094] usb 3-6: Manufacturer: Framework
[ 1.845095] usb 3-6: SerialNumber: 11AD1D004E6B2E0E0F1F0B00
[ 1.853173] hid-generic 0003:32AC:0002.0003: hiddev96,hidraw2: USB HID v1.11 Device [Framework HDMI Expansion Card] on usb-0000:00:14.0-6/input1
[ 1.881457] i915 0000:00:02.0: [drm] VT-d active for gfx access
--
[ 8.483787] iTCO_wdt iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
[ 8.511364] snd_hda_intel 0000:00:1f.3: DSP detected with PCI class/subclass/prog-if info 0x040380
[ 8.511416] snd_hda_intel 0000:00:1f.3: enabling device (0000 -> 0002)
[ 8.511682] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[ 8.542157] intel_tcc_cooling: Programmable TCC Offset detected
[ 8.579346] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC295: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:speaker
[ 8.579349] snd_hda_codec_realtek hdaudioC0D0: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[ 8.579350] snd_hda_codec_realtek hdaudioC0D0: hp_outs=1 (0x21/0x0/0x0/0x0/0x0)
[ 8.579351] snd_hda_codec_realtek hdaudioC0D0: mono: mono_out=0x0
[ 8.579352] snd_hda_codec_realtek hdaudioC0D0: inputs:
[ 8.579352] snd_hda_codec_realtek hdaudioC0D0: Headset Mic=0x19
[ 8.579353] snd_hda_codec_realtek hdaudioC0D0: Headphone Mic=0x1a
[ 8.579353] snd_hda_codec_realtek hdaudioC0D0: Internal Mic=0x12
[ 8.605419] iwlwifi 0000:aa:00.0: Detected Intel(R) Wi-Fi 6 AX210 160MHz, REV=0x420
--
[ 8.879762] iwlwifi 0000:aa:00.0 wlp170s0: renamed from wlan0
[ 9.284946] input: HDA Intel PCH Headphone Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input20
[ 9.285476] input: HDA Intel PCH HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input21
[ 9.286044] input: HDA Intel PCH HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input22
[ 9.286195] input: HDA Intel PCH HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input23
[ 9.286325] input: HDA Intel PCH HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input24
[ 9.286461] input: HDA Intel PCH HDMI/DP,pcm=10 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input25
[ 9.287124] input: HDA Intel PCH HDMI/DP,pcm=11 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input26
[ 9.288642] input: HDA Intel PCH HDMI/DP,pcm=12 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input27
[ 9.288725] input: HDA Intel PCH HDMI/DP,pcm=13 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input28
[ 9.288796] input: HDA Intel PCH HDMI/DP,pcm=14 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input29
[ 9.288845] input: HDA Intel PCH HDMI/DP,pcm=15 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input30
[ 9.289865] input: HDA Intel PCH HDMI/DP,pcm=16 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input31
[ 9.290008] input: HDA Intel PCH HDMI/DP,pcm=17 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input32
[ 9.309342] EXT4-fs (nvme0n1p2): mounted filesystem with ordered data mode. Opts: (null). Quota mode: none.
** OS: **
Fedora Linux 36 (Workstation Edition), 64-bit, GNOME 42.4, Wayland
** Troubleshooting: **
systemctl --user status session.slice
<snippet>
├─pipewire-pulse.service
│ └─ 1976 /usr/bin/pipewire-pulse
├─pipewire.service
└─ 1666 /usr/bin/pipewire
├─wireplumber.service
│ └─ 1667 /usr/bin/wireplumber
systemctl --user status pipewire.service
● pipewire.service - PipeWire Multimedia Service
Loaded: loaded (/usr/lib/systemd/user/pipewire.service; enabled; vendor preset: disabled)
Drop-In: /usr/lib/systemd/user/pipewire.service.d
└─00-uresourced.conf
Active: active (running) since Mon 2022-08-22 11:40:22 EDT; 2h 15min ago
TriggeredBy: ● pipewire.socket
Main PID: 1666 (pipewire)
Tasks: 2 (limit: 18884)
Memory: 18.0M
CPU: 2.954s
CGroup: /user.slice/user-1000.slice/user@1000.service/session.slice/pipewire.service
└─ 1666 /usr/bin/pipewire
Aug 22 11:40:22 fedora systemd[1647]: Started pipewire.service - PipeWire Multimedia Service.
systemctl --user status pipewire-pulse.service
● pipewire-pulse.service - PipeWire PulseAudio
Loaded: loaded (/usr/lib/systemd/user/pipewire-pulse.service; disabled; vendor preset: disabled)
Active: active (running) since Mon 2022-08-22 11:40:25 EDT; 2h 17min ago
TriggeredBy: ● pipewire-pulse.socket
Main PID: 1976 (pipewire-pulse)
Tasks: 2 (limit: 18884)
Memory: 36.7M
CPU: 4.848s
CGroup: /user.slice/user-1000.slice/user@1000.service/session.slice/pipewire-pulse.service
└─ 1976 /usr/bin/pipewire-pulse
Aug 22 11:40:25 fedora systemd[1647]: Started pipewire-pulse.service - PipeWire PulseAudio.
Aug 22 11:40:25 fedora pipewire-pulse[1983]: 536870912
systemctl --user status wireplumber.service
● wireplumber.service - Multimedia Service Session Manager
Loaded: loaded (/usr/lib/systemd/user/wireplumber.service; enabled; vendor preset: enabled)
Active: active (running) since Mon 2022-08-22 11:40:22 EDT; 2h 19min ago
Main PID: 1667 (wireplumber)
Tasks: 4 (limit: 18884)
Memory: 6.0M
CPU: 763ms
CGroup: /user.slice/user-1000.slice/user@1000.service/session.slice/wireplumber.service
└─ 1667 /usr/bin/wireplumber
Aug 22 11:40:22 fedora systemd[1647]: Started wireplumber.service - Multimedia Service Session Manager.
Aug 22 11:40:22 fedora wireplumber[1667]: Failed to set scheduler settings: Operation not permitted
Aug 22 11:40:22 fedora wireplumber[1667]: SPA handle 'api.libcamera.enum.manager' could not be loaded; is it installed?
Aug 22 11:40:22 fedora wireplumber[1667]: PipeWire's libcamera SPA missing or broken. libcamera not supported.
Aug 22 11:40:22 fedora wireplumber[1667]: reserve-device plugin is not connected to D-Bus, disabling device reservation
aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
pipewire
PipeWire Sound Server
default
Default ALSA Output (currently PipeWire Media Server)
sysdefault:CARD=PCH
HDA Intel PCH, ALC295 Analog
Default Audio Device
front:CARD=PCH,DEV=0
HDA Intel PCH, ALC295 Analog
Front output / input
surround21:CARD=PCH,DEV=0
HDA Intel PCH, ALC295 Analog
2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=PCH,DEV=0
HDA Intel PCH, ALC295 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
HDA Intel PCH, ALC295 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
HDA Intel PCH, ALC295 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
HDA Intel PCH, ALC295 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
HDA Intel PCH, ALC295 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
hdmi:CARD=PCH,DEV=0
HDA Intel PCH, DENON-AVRHD
HDMI Audio Output
hdmi:CARD=PCH,DEV=1
HDA Intel PCH, HDMI 1
HDMI Audio Output
hdmi:CARD=PCH,DEV=2
HDA Intel PCH, HDMI 2
HDMI Audio Output
hdmi:CARD=PCH,DEV=3
HDA Intel PCH, HDMI 3
HDMI Audio Output
hdmi:CARD=PCH,DEV=4
HDA Intel PCH, HDMI 4
HDMI Audio Output
hdmi:CARD=PCH,DEV=5
HDA Intel PCH, HDMI 5
HDMI Audio Output
hdmi:CARD=PCH,DEV=6
HDA Intel PCH, HDMI 6
HDMI Audio Output
hdmi:CARD=PCH,DEV=7
HDA Intel PCH, HDMI 7
HDMI Audio Output
hdmi:CARD=PCH,DEV=8
HDA Intel PCH, HDMI 8
HDMI Audio Output
hdmi:CARD=PCH,DEV=9
HDA Intel PCH, HDMI 9
HDMI Audio Output
hdmi:CARD=PCH,DEV=10
HDA Intel PCH, HDMI 10
HDMI Audio Output
Note: After the following command executes, HDMI Audio no longer works.
speaker-test -Dhdmi:CARD=PCH,DEV=0 -c 2
speaker-test 1.2.7
Playback device is hdmi:CARD=PCH,DEV=0
Stream parameters are 48000Hz, S16_LE, 2 channels
Using 16 octaves of pink noise
Playback open error: -16,Device or resource busy