I can freeze the system reproducibly in 2.6.35-rc2 and 2.6.34 when I simply try
to strace a running X. strace-ing other processes is no problem. Nothing in the
logs unfortunately. This happens with nosmp and with smp. I would like to track
this down. What should I be looking for? Apart from trying to bisect it, which I
will try.

Ortwin

Linux mithril 2.6.35-rc2 #6 SMP PREEMPT Mon Jun 7 07:37:03 CEST 2010 i686
Intel(R) Core(TM)2 CPU T7600 @ 2.33GHz GenuineIntel GNU/Linux