On Tue Jul 01 2014 12:54:49 GMT+0100 (BST), Takashi Iwai wrote:
At Tue, 01 Jul 2014 12:49:32 +0100, Steven Newbury wrote:
On Mon, 2014-06-30 at 11:24 +0200, Takashi Iwai wrote:
At Sun, 29 Jun 2014 15:09:56 +0100, Steven Newbury wrote:
I sent Takashi an email mentioning this regression a month ago, and it's taken me this long to send this email... :-$ Since updating to kernel versions >=3.15 I've had no audio from my laptop speakers. Earlier versions worked fine. It's a CLEVO W270EUQ laptop. The output mixer device is showing up, but no sound comes out at any volume level. As requested I've attached compressed alsa-info.sh output for both the working and non-working cases. I'm perfectly willing to test patches etc.
Hm, I see no significant difference between 3.14 and 3.15 alsa-info.sh outputs, and there's been very little change for VIA codecs between these versions. So, in short, I have no idea what went wrong.
Could you double-check whether it's really a kernel issue? That is, switch between 3.14 and 3.15 and confirm the problem happens only with 3.15. Also, for testing the sound, try like
% aplay -Dplughw -vv foo.wavChecked again.
3.16-rc2: silence 3.14.3: works fine
Then I'd suggest to bisect between 3.14 and 3.15.
Will do.