Thank you very much for your work!
The last patch solved the problem. No system hangs anymore. Looking back, I must say it was not *that* practical to reboot the system every time I used the audio device :-)
The sound quality is ok (I wouldn't expect it any better with this cheap card). Using my impulse response program, I also recognized that the overall D/A + A/D latency is constant (32 samples) as expected. (I could never see this before because using my cs46xx based xfire the latency changes in the range of 200 - 258 samples with every run. Bad - the xfire has much better sound quality. Is this a hint that pcm_link() doesn't work with cs46xx or is this maybe due to the DSP structure of the xfire?)
Using aplay, at the end of the audio file the last played samples get repeated once. This doesn't happen with 'play', 'cat somefile /dev/dsp' or 'artsplay'. But when I cause an error beep in a shell, I first hear the beep and then the last samples played back before by any program like aplay, play, xmms,... I can reproduce this as many time as I like, i.e. the samples remain in the soundcard buffer all the time.
Another issue regarding aplay: playing back mono wav with a sampling frequency below 44k1, the sound get's crackled. This also doesn't happen with the other playback programs.
Now I don't know if these small problems result from playing back through the alsa device directly or if they are caused by aplay. Sorry to say I've no other native alsa app installed at the moment to do tests (e.g. alsa output for xmms ...).
Takashi wrote:
perhaps do you see something out in the kernel messages on console 10I can switch with alt+f1 .. +f6 to the consoles 1 ..6, alt+f7 is X, but alt+f8 and alt+f10 only show a blinking cursor at the top. Does that mean that there are no messages or are I'm doing something wrong? (I don't see any messages that I can read in /var/log/messages afterwards)
(alt+f10) when the system hangs? well, after hang up, you cannot
switch the console, but you can start aplay on a certain
console, switch with alt+f10 and wait until the playback is finished.
anyway, could you try the attached patch?
of course.
if you see something on the kernel messages such like kernel panic or
oops, we can track the point...
sorry, but... ... no more kernel problems to report ;-)
cheers
ciao,
Takashi
fe
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