Soundcard power_save modprobe option not respected after upgrade to 41.20241112.1

[sander2324]

Describe the bug

I have a modprobe.d file specifying to disable the audio power_save parameter (options snd_hda_intel power_save=0). After the update, this was not respected and reading /sys/module/snd_hda_intel/parameters/power_save gave back 10 instead of 0. Which is what I got previously.

What did you expect to happen?

I expected for my system to respect the modprobe file I have in place and to apply it to the system.

Output of rpm-ostree status

State: idle
AutomaticUpdates: stage; rpm-ostreed-automatic.timer: no runs since boot
Deployments:
● ostree-image-signed:docker://ghcr.io/ublue-os/aurora-dx-nvidia:stable
                   Digest: sha256:55884509338bed4c483f7b4132c1f728e14136d32577e588cacfaf01b350d748
                  Version: 41.20241112.1 (2024-11-12T21:12:12Z)
             InitramfsEtc: /etc/crypttab

  ostree-image-signed:docker://ghcr.io/ublue-os/aurora-dx-nvidia:stable
                   Digest: sha256:e8ae423bc45a10768fbe2ff3e95113715e0786b8287f3b121a657a925d523bf8
                  Version: 40.20241109.0 (2024-11-10T16:53:55Z)
             InitramfsEtc: /etc/crypttab

Output of groups

sander wheel docker lxd incus-admin libvirt

Extra information or context

No response

[jgroman]

I have the same problem on my system. power_save parameter value is not applied also if specified using rpm-ostree kargs --append="snd_hda_intel.power_save=0".

Based on further research I suspect it might be caused by TuneD power management. Default tuned profile on fresh install is balanced (run tuned-adm active to find out). Turns out balanced profile overrides audio powersave timeout to 10 seconds: balanced/tuned.conf#L22

I suppose using a different or custom tuned profile might fix the issue we are experiencing. I'll do some more experiments in this direction.

Edit:
I was able to create customized balanced tuned profile. Activating this profile sets the required power_save=0.
But so far I was not able to make this profile persistent between reboots.

$ sudo cp -r /usr/lib/tuned/profiles/balanced /etc/tuned/profiles/balanced-no-audio-powersave
$ sudo vim /etc/tuned/profiles/balanced-no-audio-powersave/tuned.conf
$ cat /etc/tuned/profiles/balanced-no-audio-powersave/tuned.conf
#
# tuned configuration
#

[main]
summary=General non-specialized tuned profile (no audio powersave)
include=balanced

[audio]
timeout=0

$ sudo tuned-adm profile balanced-no-audio-powersave
$ tuned-adm active
Current active profile: balanced-no-audio-powersave

Edit 2:
So the final piece to the puzzle is to edit /etc/tuned/ppd.conf and update PPD - TuneD profile mapping. This autoloads custom tuned profile on system boot.

cat /etc/tuned/ppd.conf
[main]
# The default PPD profile
default=balanced
battery_detection=true

[profiles]
# PPD = TuneD
power-saver=powersave
balanced=balanced-no-audio-powersave
performance=throughput-performance

[battery]
# PPD = TuneD
balanced=balanced-battery