I've previously posted under ALSA's user mailing list so to avoid the clutter, the details about what's happening is here: http://article.gmane.org/gmane.linux.alsa.user/38258 http://article.gmane.org/gmane.linux.alsa.user/38260

There was no debug info under /proc/asound/card0/ so nothing to give from there unless you guys need something specific.

Output of alsa-debug.sh: http://www.alsa-project.org/db/?f=26187faadd47f3626029ba667cb004e74695f2b2

aplay returns: ________________________________________________________________________ $ aplay -vv 03\ paris\ match-\ Bikeride.wav Playing WAVE '03 paris match- Bikeride.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo Plug PCM: Direct Stream Mixing PCM Its setup is: stream : PLAYBACK access : RW_INTERLEAVED format : S16_LE subformat : STD channels : 2 rate : 44100 exact rate : 44100 (44100/1) msbits : 16 buffer_size : 4096 period_size : 1024 period_time : 23219 tstamp_mode : NONE period_step : 1 avail_min : 1024 period_event : 0 start_threshold : 4096 stop_threshold : 4096 silence_threshold: 0 silence_size : 0 boundary : 1073741824 Hardware PCM card 0 'C-Media CMI8738' device 0 subdevice 0 Its setup is: stream : PLAYBACK access : MMAP_INTERLEAVED format : S16_LE subformat : STD channels : 2 rate : 44100 exact rate : 44100 (44100/1) msbits : 16 buffer_size : 4096 period_size : 1024 period_time : 23219 tstamp_mode : ENABLE period_step : 1 avail_min : 1024 period_event : 0 start_threshold : 1 stop_threshold : 1073741824 silence_threshold: 0 silence_size : 1073741824 boundary : 1073741824 appl_ptr : 0 hw_ptr : 0 #+ | 00% _____________________________________________________________________