> Invalid operand 0000 > =2E.. > Call Trace [ hexadecimal stack trace which I know is meaningless here ] It isn't meaningless, it is the only way to debug that problem. See Documentation/oops-tracing.txt (and Documentation/serial-console.txt maybe ...). > <6>btaudio : buffer overrun > I do nothing with btaudio. This simply can't happen if you don't use btaudio. The message is printed by the btaudio irq handler and you can never ever reach that place in the code if you don't record something from btaudio. Gerd -- #define ENOCLUE 125 /* userland programmer induced race condition */