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Sound not working with kernel 2.6.5

I upgraded my PowerBook G4 (first generation) from 2.4 kernels to
2.6.5, using the kernel-image-2.6.5-powerpc package. And sound isn't

ogg123 says:

Error: Cannot open device oss.

With the "-d esd" option, I get:

Error: Cannot open device esd.

/dev/dsp: No such device

and ogg123 segfaults. I already had problems with 2.4 kernels
(bug 225393), but now this doesn't work at all.

Concerning the mixer, tkmixer says:

error opening mixer device
tkmixer: No such device

and gnome-volume-control:

Warning: This version of the Gnome Volume Control was compiled with
OSS version 3.8.2, and your system is running
version 32767.242.0.

and I get an error box saying:

Unable to open audio device '/dev/mixer'.
Please check that you have permissions to open '/dev/mixer'
and that you have sound support in your kernel.

ay:~> ll /dev/mixer
crw-rw-rw-    1 root     audio     14,   0 2002-01-25 00:43:02 /dev/mixer

ay:~> lsmod|grep snd
snd_pcm_oss            67204  0 
snd_pcm               118680  1 snd_pcm_oss
snd_page_alloc         13636  1 snd_pcm
snd_timer              28836  1 snd_pcm
snd_mixer_oss          23104  1 snd_pcm_oss
snd                    64824  4 snd_pcm_oss,snd_pcm,snd_timer,snd_mixer_oss
soundcore              11652  1 snd

Vincent Lefèvre <vincent@vinc17.org> - Web: <http://www.vinc17.org/>
100% validated (X)HTML - Acorn / RISC OS / ARM, free software, YP17,
Championnat International des Jeux Mathématiques et Logiques, etc.
Work: CR INRIA - computer arithmetic / SPACES project at LORIA

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