I have a T23. Sound has always worked up to kernel 2.6.21, but there is no sound output in 2.6.22. (sound input seems to work) This is Debian sid, with ALSA and OSS emulation. I've got other computers whiche I upgraded to kernel 2.6.22 without losing sound. I would appreciate any clues Jon Kåre Hellan, Trondheim, Norway