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... .
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