[X58A-UD3R, Nvidia GPU 84 HDMI/DP, Digital Out, HDMI] No sound at all after resuming from suspend

[Samuel Ainsworth]

Sound works fine after an initial boot up, but fails after resuming from a suspend. Going to the "Sound" section in the Settings app, I no longer see the HDMI device presented as an output option when this occurs.

I suspect this is due to issues with pulseaudio. At least, running `pulseaudio -k && pulseaudio --start`, then restarting apps seems to fix the issue. In particular I've found that the pulseaudio systemd service has failed after resuming from suspend. After scanning through journalctl, there are a few suspect sections. I've attached the logs in their entirety, and an abbreviated log with only sections that I found interesting. I cannot be sure which are at fault, but hopefully it helps narrow the search.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.4.0-73.82-generic 5.4.106
Uname: Linux 5.4.0-73-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.17
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: skainswo 2282708 F.... pulseaudio
 /dev/snd/controlC0: skainswo 2282708 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed May 19 16:08:41 2021
InstallationDate: Installed on 2020-05-15 (369 days ago)
InstallationMedia: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/home/username/.nix-profile/bin/zsh
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:NVidia failed
Symptom_Card: GP106 High Definition Audio Controller - HDA NVidia
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: skainswo 2282708 F.... pulseaudio
 /dev/snd/controlC0: skainswo 2282708 F.... pulseaudio
Symptom_Jack: Digital Out, HDMI
Symptom_Type: No sound at all
Title: [X58A-UD3R, Nvidia GPU 84 HDMI/DP, Digital Out, HDMI] No sound at all
UpgradeStatus: Upgraded to focal on 2020-08-08 (284 days ago)
dmi.bios.date: 04/20/2010
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: FA
dmi.board.name: X58A-UD3R
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrFA:bd04/20/2010:svnGigabyteTechnologyCo.,Ltd.:pnX58A-UD3R:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnX58A-UD3R:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: X58A-UD3R
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

[Samuel Ainsworth (sidekick)]

As a quick update, I managed to kill all of the spurious pulseaudio processes that had been lying around as a result of `pulseaudio -k && pulseaudio --start` and got the systemd pulseaudio process back on its feet. Then I confirmed that the audio worked, suspended my system, and woke it up again and the audio still works!

Therefore I suspect that pulseaudio processes started by the user in terminal sessions (daemonized) do not survive the suspend/resume cycle for some reason(?). How the systemd pulseaudio process failed to begin with remains the larger issue, however.

[Samuel Ainsworth (sidekick)]

Just woke up from a suspend once again and still getting this issue. The most recent log lines are

May 19 17:30:18 skainswo-X58A-UD3R systemd[1798]: Starting Sound Service...
May 19 17:30:18 skainswo-X58A-UD3R systemd[1798]: Started Sound Service.
May 19 17:30:27 skainswo-X58A-UD3R pulseaudio[1811]: GetManagedObjects() failed: org.freedesktop.DBus.Error.TimedOut: Failed to activate service 'org.bluez': timed out (service_start_timeout=25000ms)
May 19 17:33:38 skainswo-X58A-UD3R pulseaudio[1811]: ALSA woke us up to write new data to the device, but there was actually nothing to write.
May 19 17:33:38 skainswo-X58A-UD3R pulseaudio[1811]: Most likely this is a bug in the ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA developers.
May 19 17:33:38 skainswo-X58A-UD3R pulseaudio[1811]: We were woken up with POLLOUT set -- however a subsequent snd_pcm_avail() returned 0 or another value < min_avail.

But these logs are from two days ago...