Hi, I have intermittent kernel lockups (happens every 3-7 days). It happens with all kernels I have on the machine, that is last 3 fedora stock kernels. Once it happens I can only reboot the computer using Alt- SysRq key. I happened to be in the terminal window during one of the lockups, and kernel gave out some info, but most of it scrolled off the screen (nothing went to /var/log/messages). Similarly, trying to get info with Alt-SysRq does not help because most of the info is off the screen. I do not have an easy way to redirect this somewhere through the serial port. I would appreciate any help in either capturing the output of Alt-SysRq or more generally diagnosing the problem. I would recompile the kernel if needed for diagnostics. Thanks, Yuri Shirman