2010/1/7 Jaroslav Kysela perex@perex.cz
On Wed, 6 Jan 2010, pl bossart wrote:
The improved and more clean fix in now in my tree:
http://git.alsa-project.org/?p=alsa-kernel.git;a=commitdiff;h=1250932e48d3b6...
Note that you should apply these 4 patches (in reverse order):
4: ALSA: pcm_lib - optimize wake_up() calls for PCM I/O 3: ALSA: pcm_lib - cleanup & merge hw_ptr update functions 2: ALSA: pcm_lib - add possibility to log last 10 DMA ring buffer positions 1: ALSA: pcm_lib.c - convert second xrun_debug() parameter to use defines
Patch #3 should definitely fix problems with large avail or delay values reported in PA. I finally figured the culprit (and decide to cleanup all relevant code rather do just another workaround). In other words, new hw_ptr pointer should never be less than previous one now.
Jaroslav
using alsa-driver-1.0.22.1.1.g231e3.14.g812cb and Fedora 12 inside Virtual Box
aplay -D plughw:0,0 /usr/share/sounds/alsa/*.wav
"Front Left" sound as "Front Front Left" when playing "Front_left.wav"
only when echo 4 > /proc/asound/card0/pcm0p/xrun_debug