[alsa-devel] PROBLEM: [Lenovo ThinkPad X61s] Speaker volume mutes itself in random intervals after upgrading from 3.11 to 3.15.

[Takashi Iwai]

At Mon, 02 Jun 2014 01:55:16 -0700,
Alex Fedora wrote:
> 
> On 06/02/2014 01:03 AM, Takashi Iwai wrote:
> > At Sat, 31 May 2014 23:54:26 -0700,
> > Alex Fedora wrote:
> >> Hi,
> >>
> >> Please see problem description below. I've captured alsa info output for
> >> the latest kernel. Kernel just before the regression. And info from the
> >> kernel with the offending commit. But I had to calculate diff from first
> >> one to fit to 100K limit. If you want, I can send all 3 files as an
> >> attachments. Also the latest version of the kernel was took from
> >> http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/current/linux-image-3.15.0-999-generic_3.15.0-999.201405310205_amd64.deb
> >> .
> >>
> >> Thank you,
> >> Alex
> >>
> >> [1.] One line summary of the problem: [Lenovo ThinkPad X61s] Speaker
> >> volume mutes itself in random intervals after upgrade to latest kernel
> >> [2.] Full description of the problem/report:
> >>
> >> Speaker mutes itself in random intervals. Headphones are working fine at
> >> that moment. I can see what volume of the Speaker drops to 0% and then
> >> back to 100% using alsamixer. It seems like Internal Mic Boost also
> >> jumps from 100% to 0% and back. It is regression from
> >> 5ccc618fee67f0f0b2122dd4b32a02fd2b6a1569 (ALSA: hda - Remove static
> >> quirks for AD1884/1984 & variants). I've tested previous commit
> >> aa95d61b43e0fcb0b2ce68e5efa37174fd9e5cd3 (ALSA: hda - Remove static
> >> quirks for AD1882) and audio works as expected.
> >>
> >> New kernel shows two controls "Headphone Playback Volume" and "Speaker
> >> Playback Volume". But old one shows single control "PCM Playback
> >> Volume". "Speaker Playback Volume" is the one which gets muted randomly.
> > Are you using PulseAudio?  If yes, does the problem happen without PA?
> > This kind of random mute/unmute tends to be an issue of bogus
> > headphone or mic jack detection.
> >
> >
> > Takashi
> >
> Hi Takashi,
> 
> Yes, I'm using  PulseAudio. I've removed it and issue gone away. It 
> returned back after reinstalling it. This is still driver bug, right?

Yes.  So PA seems confused by some bogus information by the driver.

Try to run "alsactl monitor 0", maybe better without PA at first.
Do you see occasional events about the jack detection even if you
don't plug/unplug?  And, try it also with PA.


Takashi