Dear AU list,
Sorry if this is received more than once, the original never seemed to arrive...
I have linux install on a powerbook G4 titanium and the sound does not work. At
best I get a short
burst of sound 1-5seconds long and then nothing and the application hangs (in
this case aplay).
I have tried my distro alsa and compiling 1.0.15 from scratch and I get the
same result.
I have determined that this line in aplay is where the fault is:
line 1260: r= writei_func(handle, data, count);
I am presuming this is where the data is written to the driver and what happens
is the program calls writei fine for a few calls
and after a random amount of time (normally 1-5 seconds). writei never returns
and the sound stops.
writei seems to be pointing to snd_pcm_writei which I am guessing evenutally
calls a a kernel driver API function somewhere (but I don't know where).
I have recompiled the alsa driver with debugging on and explicitly turned on
the debugging printks in the powermac tumbler driver. These indicate
that the powermac tumbler driver is being used but give no indication of any
problem.
I should add that the sound worked perfectly under maxosx.
It looks to me like this is a kernel driver / hardware issue and I need advice
as to how to track this and debug it.
I am using alsa 1.0.15 kernel 2.6.22.13-0.3 (suse 10.3) on a ppc and I think I
have a powermac tumbler sound card.
Any hints gratefully received.
BTW The AOA / soundbus devices would not compile for me - it looks like the
kernel api interface has changed and the module has not
been changed to match, the offending call is add_uevent_var in
aoa/soundbus/core.c. I am not sure if it is out of date or not maintained
but the number of parameters does not match the correct number of parameters in
my kernel sources so it will not compile.
Since this is may be a driver issue is there a better place to post this
problem, LKML for instance?
Cheers,
SA
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