> could you just try v2.6.21 plus the -rt patch, which has the tracer > built-in? That's a combination that should work well. You can pick it up > from: > > http://people.redhat.com/mingo/realtime-preempt/ > > same config options as above. If you dont turn on PREEMPT_RT you'll get > an almost-vanilla kernel. 2.6.22-rc2, only EVENT_TRACE - boots, can't rerpoduce 2.6.21-vanila - can reproduce 2.6.21-rt7, trace options off - can reproduce 2.6.21-rt7, trace options on - can't reproduce Possibly something timing related, that's altered by the trace code. I tried the trace kernel without starting the trace app, but still no bug. Any other ideas? Thanks, Miklos - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html