xorg crashing with kde

[RW]

Since the kde update went into ports about a week ago, I've been having a 
problem with xorg crashing.

The problem occurs when a kde session is left in the "background" by a switch 
to either another x-server or to a virtual terminal, and it's left there long 
enough for the monitor standby timer to expire. The crash actually happens on 
switching back to the kde session.

According to the system console the crash follows a stray irq13, and the xorg 
log indicates it died with signal 8. I cant find any other relevent logging. 
I installed xscreensaver  to see if it could be reproduced under xfce, and it 
couldn't. I can work around the problem  by turning off display power 
management in kde.