Problem with ALSA and iBook/G4

[Sylvain Joyeux <sylvain.joyeux@m4x.org>]

I have an ibook G4 and using alsa freezes the system (I have about 1 hr of 
uptime when I'm listening to music, no problem when not using the soundcard). 
I'm using the OSS driver now, as it does not show the problem.

I experienced it on every 2.4 and 2.6 kernel I used. I'm using now vanilla 
2.6.5, without any patch, and with preempt disabled. No trace of a kernel 
panic in the logs.

Please tell me what I can do to provide some more useful information. 

Thanks in advance
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Sylvain Joyeux