Red Hat Bugzilla – Bug 620248
Sound problems with Intel HDA ICH8 (snd_hda_intel codec ALC286)
Last modified: 2010-12-09 04:07:48 EST
Description of problem:
With fedora 12 sound worked fine, but afer doing a clean installation of fedora 13 the sound seems to randomly stop for a few milliseconds and then the sound continues, some times there are some "clicks" and a small part of the skipped sound is played at the same time it plays the next part. I've been following instrucctions found in https://fedoraproject.org/wiki/How_to_debug_PulseAudio_problems but nothing seems to work for me.
This behaviour seems to be a bit fuzzy as some days I can use sound as I always did with fedora 12 but other days I cannot use any app that outputs sound, as each time the sound stops the application seems to freeze, so any of those apps are unusable for me (flash-based apps, music players, video players, etc).
I've tried to check if this is a sound driver problem listing devices with aplay -L and using front instead of Default and it seemed it was.
Version-Release number of selected component (if applicable):
"uname -a" output:
Linux hyperion.lan 188.8.131.52-147.fc13.i686.PAE #1 SMP Tue Jul 6 22:24:44 UTC 2010 i686 i686 i386 GNU/Linux
This is an up-to-date fedora 13 setup.
Steps to Reproduce:
1. You need my laptop
2. Use an app that produces some kind of sound output
3. Listen to sound stopping and getting back all the time (irregular timming).
I can't listen sound properly. Even some apps hangs while playing sound under too much stop-continue weirdness.
I can listen music, whatch videos in youtube and play games without sluggish sound.
I've collected as much information as I can.
The output of "lspci | grep -i audio" is:
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
The output of "cat /etc/proc/asound/pcm" is:
00-00: ALC268 Analog : ALC268 Analog : playback 1 : capture 1
00-06: Si3054 Modem : Si3054 Modem : playback 1 : capture 1
I've also got some output of pulseaudio -vvvvv and aplay that shows a lot of underruns. These along with alsainfo output are added as attachements.
Created attachment 435901 [details]
output of pulseaudio -vvvvv
Created attachment 435902 [details]
More output of pulseaudio -vvvvv
Created attachment 435903 [details]
Console output of aplay without pulseaudio
Created attachment 435904 [details]
Console output of aplay with pulseaudio enabled
Created attachment 435905 [details]
Created attachment 435906 [details]
Output of lsmod | grep snd_
Created attachment 435907 [details]
Output of aplay -L
Latest kernel update doesn't solve it.
current "uname -a" output:
Linux hyperion.lan 184.108.40.206-147.2.4.fc13.i686.PAE #1 SMP Fri Jul 23 17:21:06 UTC 2010 i686 i686 i386 GNU/Linux
Latest kernel update (220.127.116.11-47) doesn't solve it. Any app with sound is almost unusable.
Hello. I'm still here with this issue with latest kernel update 18.104.22.168-61 (PAE).
But I've found one interesting thing. When the sound gets crazy if I start up a process that will try to use 100% cpu (my laptom is a dual core cpu) the sound starts to work as spected.
This makes me think that I might be wrong about the alsa driver being guilty of this nuissance. But I tried common pulseaudio troubleshotting instructions and nothing seemed to work, so now I'm not sure of what to do next.
I've closed it as with Fedora 14 things seems to work a bit better (sound is almost usable but with glitches) and I'm not sure if this is a driver or pulseaudio thing.