mysterious blank screen on logout
 

I have been having a problem when I log out of my knoppix hdd install. When I choose to log out of kde, the screen goes blank, i.e. the monitor goes to standby and the computer becomes unresponsive (cant restart x server, cant get to console, cant blindly type shutdown or restart commands and have anything happen). I have to hard reboot and run fsck to revive the system, then reboot again before I can boot back to X. I have read that others (the case I read about was running Slack) have had this problem and that is xfree86 hardware related issue (I am running an amd tbird 800 with an ati radeon 9600) but I have not found a resolution. I would be wiling to believe that hardware is the culprit- I have a laptop running the same setup and have not had any problems logging in/out with it (laptop is a pIII 800, ati rage mobility 8mb video). I looked on the xfree86 site, but was unable to find anything helpful (though this may be my fault). If anyone has confonted/solved this issue, please let me know how you resolved it. Thanks in advance!

-Ryan