[alsa-devel] [CX2075] No sound after suspend/resume from front speaker

[Takashi Iwai]

On Thu, 30 Jan 2020 13:07:46 +0100,
Roman Šmakal wrote:
> 
> Dne čtvrtek 30. ledna 2020 12:57:32 CET, Takashi Iwai napsal(a):
> > On Thu, 30 Jan 2020 12:42:01 +0100,
> > 
> > Roman Šmakal wrote:
> > > Dne středa 29. ledna 2020 12:33:06 CET jste napsal(a):
> > > > On Sat, 25 Jan 2020 23:30:32 +0100,
> > > > 
> > > > Roman Šmakal wrote:
> > > > > Hi,
> > > > > 
> > > > > this still seem to be an issue. After startup everything works well
> > > > > until
> > > > > the laptop goes to suspend.
> > > > > 
> > > > > Tried pretty much everything basic user can do (unmutes, rmmods and so
> > > > > on),
> > > > > still no way to wake the output. ALSA seems to be thinking, that
> > > > > output is
> > > > > active, you can set volume and stuff, but nothing happens.
> > > > > 
> > > > > ALSA info:
> > > > > http://alsa-project.org/db/?f=9d1ee81fe037acb53ca381f2de27be420f83a373
> > > > > 
> > > > > Related links:
> > > > > https://www.reddit.com/r/archlinux/comments/4nwzua/
> > > > > no_sound_after_suspend_killing_or_restarting/
> > > > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1612916
> > > > > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=851404
> > > > 
> > > > The first thing to check is to compare alsa-info.sh outputs before and
> > > > after the suspend.
> > > > 
> > > > Also pass snd_hda_codec.dump_coef=1 module option to enable the COEF
> > > > dump.  This will give more information in alsa-info.sh outputs.
> > > > 
> > > > 
> > > > Takashi
> > > 
> > > Okay, i did some comparing with module option enabled.
> > > 
> > > 
> > > Sound working
> > > http://alsa-project.org/db/?f=adfb0b3ad5d9b8d88289ac7e35b742254beb7588
> > > 
> > > Sound not working:
> > > http://alsa-project.org/db/?f=c796b14df0efb0079aef1df5f70764194cff8d4d
> > > 
> > > What's wierd to me is, that on the row 521 there is change in aplay
> > > Subdevices from 1/1 to 0/1.
> > > 
> > > Also, state.PCH control 18 shows change in playback channel map.
> > > 
> > > Any other thing i can check or try to dofor debuging?
> > 
> > You passed a wrong option.  The option is for snd_hda_codec module.
> > So either create a modprobe.d/*.conf file containing:
> >   options snd_hda_codec dump_coef=1
> > 
> > or pass snd_hda_codec.dump_coef=1 at boot cmdline option.
> > 
> > BTW, it'd be better to get the outputs with --no-upload option of
> > alsa-info.sh, and attach them.
> > 
> > Last but not least, please don't drop Cc to ML unless you need to do
> > so.
> > 
> > 
> > thanks,
> > 
> > Takashi
> 
> Alright, my bad, i'm new to this.
> 
> Attaching alsainfos with proper module options, no big difference though.

OK, so it has the codec has COEF things and there is no significant
difference between those two outputs.  It implies that something
outside HD-audio bus is needed and it's probably done by BIOS.


Takashi