At Mon, 07 Jul 2014 16:34:10 +0100, Steven Newbury wrote:
On Tue, 2014-07-01 at 13:54 +0200, 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.wav
Checked again. 3.16-rc2: silence 3.14.3: works fine
Then I'd suggest to bisect between 3.14 and 3.15.
Somewhat surprisingly I ended up here:
dcb32ecd9a533f47ab652c5c5680bc50a7a822cd is the first bad commit
commit dcb32ecd9a533f47ab652c5c5680bc50a7a822cd Author: Anssi Hannula anssi.hannula@iki.fi Date: Tue Apr 8 12:36:42 2014 +0300
ALSA: hda - Do not assign streams in reverse order Currently stream numbers are assigned in reverse order. Unfortunately commit 7546abfb8e1f9933b5 ("ALSA: hda - Increment default stream numbers for AMD HDMI controllers") assumed this was not the case (specifically, it had the "old cards had single device only" => "extra unused stream numbers do not matter" assumption), causing non-working audio regressions for AMD Radeon HDMI users. Change the stream numbers to be assigned in forward order. The benefit is that regular audio playback will still work even if the assumed stream count is too high, downside is that a too high stream count may remain hidden. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=77002 Reported-by: Christian Güdel <cg@dmesg.ch> Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi> Tested-by: Christian Güdel <cg@dmesg.ch> # 3.14 Cc: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>:040000 040000 6ed3a982a9600333b07a42169db5173fa75b8618 b7ff28d00007f988221ba58c9d3f501fdb3a7583 M sound
Interesting. Does reverting this commit fix the issue? Just run "git revert dcb32ecd9a533f47ab652c5c5680bc50a7a822cd", and test it.
thanks,
Takashi