morten.stenseth(a)baerum-kommune.telemax.no writes: OK. We need more data to isolate the problem. Try starting XEmacs as "xemacs -nw". If the system doens't lock up, then we're probably dealing with a X related video driver bug or something like that. If the system still locks up, then there is some other kernel trouble. But even this little bit of information would help. You could also try starting XEmacs as "xemacs -f kill-emacs". If the system still locks up, then we can rule out the event loop being the cause of the trouble. Did you compile with sound support enabled? If so do you use it in your startup sequence? If so you might try disabling it and see if it helps. SOmething you can try to verify that your system is unrecoverable when it hangs is to start XEmacs with this script #!/bin/sh xemacs & sleep 15 kill -9 $! This start XEmacs is the background, waits 15 seconds and then tries to kill the process. IF XEmacs is killable using this method then your system isn't in as much distress as we thought, and the bug is likely not to be in the Linux kernel or drivers.