I have a Thinkpad 600 with ISA based Crystal sound. It worked fine with RH6 and FC1, but FC2 won't detect it. This system has some weird plug-n-play issues, but everything /is/ configured correctly at the BIOS level. (As I said before, it worked with FC2. Quick-boot is OFF and it is configured with PS2.EXE). system-configure-sound reports no soundcards. Attempting to modprobe the cs4232 or cs4236 (I think. I'm working from memory here.) reports "No such device." :-/ Any ideas? Thanks, Peter