All right, let me start from the beginning.
Since the upgrade to Natty, I've been experiencing various sound-related
problems:
* sometimes a youtube video suddenly plays without sound, but a simple
manual seek makes the problem go away
* sometimes volume keys stop working -- although sound plays fine
(apparently pulseaudio dies and the applications fall back to alsa when
they can't connect to pulse)
* sometimes sound stops playing working, although pulseaudio is
running and volume keys work fine
I intended to focus on that last problem with this bug.
When that happens, restarting pulseaudio fixes the issue.
At first when I manually tried killall pulseaudio && pulseaudio in an
xterm, I saw the error messages about "cannot find a working alsa
profile" I mentioned about, and I *incorrectly* assumed that meant PA
wasn't working any more -- I didn't even try playing a sound. I was
wrong. PA always outputs that error on startup, and then sound works
fine. So let's ignore that error and try to figure out why PA stops
working after a long(ish) time.
Today PA stopped outputting sound again, e.g.
$ mplayer -ao pulse samplefile.mp3
AO: [pulse] Init failed: Too large
Failed to initialize audio driver 'pulse'
Could not open/initialize audio device -> no sound.
I look in /var/log/syslog and see
Jun 7 20:21:51 platonas pulseaudio[19162]: sink-input.c: Failed to create
sink input: too many inputs per sink.
Jun 7 20:22:56 platonas pulseaudio[19162]: last message repeated 7 times
Jun 7 20:23:56 platonas pulseaudio[19162]: last message repeated 24 times
Jun 7 20:24:45 platonas pulseaudio[19162]: last message repeated 12 times
...
Jun 7 20:56:49 platonas pulseaudio[19162]: sink-input.c: Failed to create
sink input: too many inputs per sink.
Jun 7 20:57:50 platonas pulseaudio[19162]: last message repeated 162 times
Jun 7 20:58:58 platonas pulseaudio[19162]: last message repeated 2256 times
'killall pulseaudio' makes the daemon restart and the problem go away.
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https://bugs.launchpad.net/bugs/773443
Title:
[natty] pulseaudio stopped working on ThinkPad T61
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