Hello,
Since 2.6.34-rc*, I have a regression on alsa which prevents the sound to be played correctly. When playing, the music goes too fast, skipping some parts. Typically, it's very easy to reproduce by doing: time mplayer -endpos 30 sound-file-which-lasts-more-than-thirty-sec.mp3
If the wall clock is less than 30s, you have the bug. With my intel-hda (AD1981), it's reliably reproducible: it gives ~27s, instead of the normal ~31s.
After bisection, it turns out that it is commit 7b3a177b0d4f92b3431b8dca777313a07533a710, aka "ALSA: pcm_lib: fix "something must be really wrong" condition" which caused this regression. Reverting it on top of 2.6.34-rc3+ fixes the problem.
Let me know if you need more info, Cheers, Eric
PS: For the info, the bisection was especially hard to do because about 80 alsa commits around the faulty one were all applied on kernel versions which did not boot on my laptop. On top of the first known bad I had to revert all of them, and run an "invert bisection" on it... Enjoy the bisection result ;-)