On Fri, 9 Jun 2006, Hui Zhou wrote:I am running a linux machine with a self programmed pvr running on it. All is well until I reinstalled the linux system a few weeks ago. Now I am suffering from random reboots. The reboots does not leave any debug messages or clues. After some isolation, I finally narrowed it down to a blankscene marking program -- bkmark. Running bkmark against any recording randomly reboots the computer. By random, I mean it may complete sucessfully once, but repeating it for a few times, the reboots will happen. On average, it reboots every 2 - 3 runs.Try to knock out any hardware problems first (run memtest86, check for high heat / crappy power).
If you're still having trouble, purchase a serial cable. Plug it into another computer with a terminal program. Enable serial console support in your kernel (and on your kernel command line). When the kernel boots, use SysRq on the serial console to turn the console messaging level up to maximum. If you're lucky, you'll catch some sort of diagnostics message on the serial console before this happens.