I found the patch that causes both the rmmod oops and a hard lock up in winecfg with snd_cmipci loaded. Introduced in 2.6.15-rc1: http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5747e54042c710272cefed74cc457531a01768c9 So I'll contact the ALSA people now.