On Mon, December 18, 2006 10:17 pm, Mark Belanger wrote: > I have many different centos machines that are hanging > regulary. I believe this is due to something our application > is doing - not a centos specific problem. A normal unprivileged userland application should not be able to bring down the kernel. Do you use any additional drivers, e.g. for the serial bus? If so, it is a good idea to enable kernel crash dumps, and send it to your driver developers to analyze the bug. Other than that, you could (in no particular order): - Let syslog send messages to some remote site. - As others suggested, use remote X or a serial console to be able to track important messages. - 'systrace -f' the X11 program, and redirect the output somewhere safe, to see the last actions that were performed by the program. With kind regards, Daniel de Kok