At Mon, 16 Mar 2015 13:37:19 +0100, Pavel Machek wrote:
On Sun 2015-03-15 09:23:15, Takashi Iwai wrote:
At Sun, 15 Mar 2015 09:15:44 +0100, Pavel Machek wrote:
On Sun 2015-03-15 09:12:47, Takashi Iwai wrote:
At Sat, 14 Mar 2015 21:11:09 +0100, Pavel Machek wrote:
Hi!
Intel desktop machine:
00:1b.0 Audio device: Intel Corporation NM10/ICH7 Family High Definition Audio Controller (rev 01)
Sound worked ok in both in previous kernel versions.
Any ideas?
How broken? Did you get any error messages?
I get some funny, faint, rhytmic noises where audio should be... Actually, I somehow suspect something is wrong with time during video playback.
Did you try audio playback without video on chromium?
Yes. Does not work, either; I tried http://www.thenakedscientists.com/HTML/podcasts/ .
If the behavior depends on the application (e.g. ALSA vs OSS), I'd suspect rather a device permission problem at first. There are no significant changes between 3.19 and 4.0-rc3 regarding HD-audio.
My system contains pulseaudio, so it is more complex than ALSA vs OSS :-(.
OK, that was missing information :) Then there should be any difference in the kernel driver side -- it's only a single PA process who accesses the sound device in the very same manner no matter what clients are used (after all it's the purpose of PA).
Audio seems to work ok on thinkpad x60 with very very similar config.
OK, then another thing I would check is to try different sample rates (e.g. via playing WAV files over PA).
Like this?
pavel@amd:/usr/share$ pacat ./sounds/alsa/Front_Right.wav pavel@amd:/usr/share$ pacat --rate=48000 ./sounds/alsa/Front_Right.wav pavel@amd:/usr/share$ pacat --rate=44100 ./sounds/alsa/Front_Right.wav pavel@amd:/usr/share$ pacat --rate=32000 ./sounds/alsa/Front_Right.wav pavel@amd:/usr/share$ pacat --rate=16000 ./sounds/alsa/Front_Right.wav pavel@amd:/usr/share$ pacat --rate=8000 ./sounds/alsa/Front_Right.wav
This seems to have behaved as expected.
Hmm. You might see a difference when comparing /proc/asound/card*/pcm0p/sub0/* files between working and broken cases (while playing something).
Other than that, I have no idea. A bisection would be needed, I'm afraid.
Takashi