Ubuntu
pulseaudio package

  1. Bug #192888 (lambie)
  2. Comment #100

Comment 100 for bug 192888

Revision history for this message
Conn O Griofa (psyke83) wrote : Re: firefox crashes on flash contents

Daniel,

Using revision 23 allows pulseaudio and ALSA applications to successfully share the sound card. However, there are issues.

The first issue is that sound is stable when playing from one source, but more than one source causes sound to quite easily stutter. I will try to force pulseaudio to use 48000Hz (which is my sound card codec's only supported native rate) to see if it helps, but I never had such stuttering issues with dmix (i.e. regular ALSA application sharing sound).

The second issue is that pulseaudio is preventing my soundcard from entering a powersaving state on idle (via snd-ac97-codec power_save=1). When the codec gets switched off (and back on) my card usually makes an almost inaudible "pop" sound, but this never happens. Two seconds after killing the pulseaudio process lets it kick in, however. I assume this is because you do not use module-suspend-on-idle anymore. Since I am on a laptop, this is an important issue for me.

I don't mean to be overly pessimistic, but I don't see the value of pulseaudio when it introduces these regressions. It's a shame that the "glitch-free"* code didn't make it in time for Hardy.

I still get warnings when invoking pulseaudio, I'll post the verbose log again in case it's useful.

*See: http://0pointer.de/blog/projects/pulse-glitch-free.html