[pulseaudio-discuss] Very crackly audio and crashing from cpu overload

[Chris]

Hi,

I've been having lots of problems with audio in Fedora 10. At first I
was having problems playing sound in youtube via firefox. I found a
tutorial which suggested I change a line in default.pa from:

load-module module-hal-detect

to

load-module module-hal-detect tsched=0

That did seem to improve things. However amarok is really not happy. I
can play mp3s for a minute or two but it is very crackly. Then
eventually the audio stops and amarok locks up. /var/log/messages
shows messages like this:

Jan  8 21:26:46 localhost pulseaudio[3188]: main.c: High-priority
scheduling enabled in configuration but not allowed by policy.
Jan  8 21:26:46 localhost pulseaudio[3188]: core-util.c:
setpriority(): Permission denied
Jan  8 21:26:46 localhost pulseaudio[3191]: alsa-util.c: Device hw:0
doesn't support 2 channels, changed to 10.
Jan  8 21:26:46 localhost pulseaudio[3191]: alsa-util.c: Device hw:0
doesn't support sample format s16le, changed to s32le.
Jan  8 21:26:46 localhost pulseaudio[3191]: alsa-util.c: Cannot find
fallback mixer control "PCM".
Jan  8 21:26:46 localhost pulseaudio[3191]: alsa-util.c: Device hw:0
doesn't support 2 channels, changed to 12.
Jan  8 21:26:46 localhost pulseaudio[3191]: alsa-util.c: Device hw:0
doesn't support sample format s16le, changed to s32le.
Jan  8 21:26:46 localhost pulseaudio[3191]: alsa-util.c: Cannot find
fallback mixer control "Mic".
Jan  8 21:33:29 localhost pulseaudio[3191]: cpulimit.c: Recevied
request to terminate due to CPU overload.

I've running an AMD Athlon 64 x2 (can't remember the exact model)
although it's 32 bit Fedora 10. The soundcard is an M-Audio Audiophile
2496 (ICE1712 chip I believe). I never got pulseaudio working with
this setup in Fedora 9 and had to remove all pulse packages. Now it's
almost working but there are clearly still issues.

Any ideas? (This is my home PC so I can only investigate in the
evenings, UK time, so bear with me! )

Thanks, Chris.