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 working.
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 <[EMAIL PROTECTED]> - 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