Re: Haswell audio no longer working with new Catpt driver

[Christian Labisch <clnetbox@gmail.com>]

$ cat /sys/module/snd_hda_intel/parameters/power_save
0

On Fri, 2021-01-01 at 14:29 +0100, Lars-Peter Clausen wrote:
> 
> 
> On 1/1/21 2:25 PM, Christian Labisch wrote:
> > Hi Takashi,
> > 
> > Thanks for your suggestion - unfortunately it does not work.
> > Still no sound after adding the boot parameter and a reboot.
> 
> Can you run `cat /sys/module/snd_hda_intel/parameters/power_save` and 
> check whether it is still 0 when the system is running?
> 
> > 
> > Regards,
> > Christian
> > 
> > On Fri, 2021-01-01 at 13:09 +0100, Takashi Iwai wrote:
> > > On Fri, 01 Jan 2021 12:10:23 +0100,
> > > Christian Labisch wrote:
> > > > Hi Lars,
> > > > 
> > > > Thanks for your response, as requested I ran alsa-info while playing audio.
> > > > Please check the attached information - to me it looks like it being a bug.
> > > > It should affect many users, will it be solved in the next release 5.10.5 ?
> > > It's likely some runtime PM-related changes that caused this behavior
> > > change.  But, there must be some program that sets the power_save
> > > option explicitly on your system.  As dmesg shows, the default
> > > power_save to this device has been suppressed, but it's activated by
> > > the later action.  On, 5.9.x, this didn't take effect, but on 5.10.x,
> > > this became effective, as it seems.
> > > 
> > > You can try to pass power_save=0 option to snd-hda-intel module (or
> > > boot with snd_hda_intel.power_save=0 boot option).  It could work
> > > around the issue, although it's no solution.
> > > 
> > > 
> > > thanks,
> > > 
> > > Takashi
> 
>