I had something of the same problem - turned out that my SB-compatible card is on IRQ 5 instead of default 7, I change the setting in /usr/src/linux/drivers/sound/Config.in and all worked well. It could be something similar, maybe IRQ or DMA conflict... good luck --- Just call me a "sugar vampire" D'jinnie/Jinn, encountered on IRC and select MU**. (jinn@irony.org) finger jinn@irony.org for PGP public key