Hi

Thanks for your reply. I tried to answer your questions below.

On 13 August 2010 17:06, Takashi Iwai tiwai@suse.de wrote:

We have had many problems with VMware, too :) Which sound backend are you using?  Direct ALSA / dmix or PA?

I believe it's direct ALSA, I have choppy output even with aplay /usr/share/sounds/alsa/*.wav

Actually, there is no real interrupt, but just the virtual one, thus it can be never accurate.  So, rather the question is how the driver is tolerant for sloppy IRQ updates.

Usually, when the period size is large and the buffer have many periods (not two), the delayed update works more stably.

I am afraid I don't understand this :)

I am compiling a kernel with the following options enabled: CONFIG_SND_PCM_XRUN_DEBUG, CONFIG_SND_VERBOSE_PROCFS, CONFIG_SND_DEBUG

Would any of these help to determine the cause and suggest a fix?

Lex