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

[Takashi Iwai]

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