On Fri, Jun 09, 2006 at 11:01:22AM -0500, Chase Venters wrote:
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.
Thanks. memtest86 passes 6 times without errors. Serial console didn't
show up anything (it just reboots).
Anyway, I finally suspect the debian libmpeg binary is at fault. I
manually build it from src and statically linked to the `bkmark'
program. It seems cured the random reboots problem. It runs
successfully for 4 times. However, the fifth time it ended up in a `D'
state. The only system call it uses is libc file IO and some signal
passing. Any comment on the cause?
--
Hui Zhou
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