Hello Alan and Marcel, this morning i got a NULL pointer dereference in tty_register_device() that looked similar to the one, i posted here on 03-jun-2009: http://marc.info/?l=linux-bluetooth&m=124404919324542&w=2 As the boot sequence stopped after this point, i was only able to take a picture of it - see attached jpg. I was able to shut down the system gracefully by pressing the power button. The problem emerges really seldom. Any idea? Regards, Oliver