Re: HP ZBook: no sound after resume on Ubuntu 20.04

On 2/8/21 12:53 PM, Blazej Slusarek wrote:
> My laptop HP ZBook Fury 15 G7 Mobile Workstation has the problem that
> there's no sound after I suspend and resume it, the only solution that
> works is hard reboot. I have 2 cards on my laptop, one is HDA Nvidia
> controlled by snd_hda_intel driver and the other is sof-hda-dsp
> controlled by snd_soc_skl_hda_dsp driver. Not sure about Nvidia card -
> didn't use it so far, but the problem is with the latter, which is my
> "main" sound card labeled Realtek ALC285. Sound works fine until I
> suspend and resume the laptop and nothing in the log seem to point to
> the cause of the problem...
> 
> logs from alsa-info when sound is working: https://pastebin.com/0CuJWiG1
> When it's not working (after resume): https://pastebin.com/CGD2GDGb
> 
> the logs are from when I added the following to /etc/modprobe.d/alsa-base.conf:
> 
> options snd slots=snd_soc_skl_hda_dsp
> options snd_soc_skl_hda_dsp index=0
> options snd-hda-intel index=1
> 
> Think I tried most solutions I could find on the net. Re-inserting
> snd_soc_skl_hda_dsp hangs forever. I also had a problem with
> pulseaudio being started by gdm, I stopped it but it didn't make any
> difference so not sure how important it is.
> 
> Another strange thing is that although the sound card is reported as 2
> channel, it seems like the front-left channel is the only one that
> works, but all speakers are playing as if it was one giant mono
> speaker. Playing anything on front-right or changing balance results
> in no sound.
> 
> Would be grateful for any help.
> 
> Best regards,
> Blazej

Hello,

regarding Nvidia there is an outstanding bug:
https://forums.developer.nvidia.com/t/nvidia-hdmi-audio-errors-after-resume-snd-hda-intel-spurious-response-last-cmd/149003/12

When I had audio problems I wrote this little script to reload the audio:

!/bin/bash

/usr/bin/killall pulseaudio
sudo /sbin/alsa force-reload
until /usr/bin/pulseaudio --check; do
	sleep 1
done