From the ALSA wiki
i'm having bad hardware freezes on 2.4.20 / 2.4.21 with version 0.9.4, on a dell c600 laptop. Any help appreciated
I am also having some serious lockups on 2.4.21 with a Dell 8100 laptop. My current "dirty" solution to this is to compile as module and do a rmmod when the sound stops working. /ziL (zilver.hellberg(at)home.se)
UPDATE: It works perfectly now (with the 2.6.5 and the latest alsa version) /ziL
If you're looking for the maestro2 module, it's called es1968.