Comment 77 for bug 1066435

The proper fix for this is at the kernel level (has anybody reported it on the powerpc kernel mailing list?), but it is also caused by snd_powermac being liberally modprobed when it shouldn't be. The casper script /scripts/casper-bottom/23etc_modules does it on the live cd and then it is done again (live and alternate) by hw-detect/discover-mac-io.