Red Hat Bugzilla – Bug 15588
Unexplained system reboot after 12 minutes of inactivity
Last modified: 2008-05-01 11:37:57 EDT
See also bug 15587 for other unusual behaviors on this system.
I have by default assigned this to kernel but I have no idea what's happening yet.
I am using 10BaseT on an SMC 1211TX 10/100 EZ network card RealTek rtl8139.c driver
at 0xf800, irq 9.
I amusing telnet from another machine to access this one. It crashes and reboots every 5-10 minutes, and ftp'ing a big file.
It appears to be stable overnight when I am not using the network (or perhaps when I am not doing lots of file i/o -- not sure).
/var/log/messages has nothing illuminating in it (no panics, etc.) "last" shows a crash but no other info. I grep'd for "panic"
and "crash" in /var/log/* but no news.
See the URL for the last 200 lines of /var/log/messages. Last reboot was apparently between 17:02 and 17:13.
I previously had a Lucent USB card and an Adaptec SCSI card u2940 but have removed them both.
Actually, I now see that it's been rebooting a lot and I didn't notice. I was not running anything on it.
Created attachment 2154 [details]
output of last
Tonight I will try removing the ethernet card. It reboots every 7-8 minutes as
it is, even with no FTP running. Any suggestions about levels of trace/debug
to set would be appreciated.
Is this an i820 or i840 based motherboard with SDRAM rather than RAMBUS memory>
This is a VS440*X (FX, I think) with a 200 MHZ Pentium Pro or Pentium MMX
and 128MB memory, either EDO or FPM, not sure at the moment.
I removed the ethernet card and it still reboots. I noticed that it was
pretty consistnt at 12 minutes, and when I was actively typing it didn't
"seem" to happen, so I suspected APMD. I stopped apmd and set it to manual
start with linuxconf but the problem was still there, every 12 minutes.
I have now removed ethernet card, removed all other cards except video,
removed floppy drive (don't ask), removed all services via linuxconf that
it seemed safe to remove (i.e. i left log daemons and keytable and so on
but removed all cron/anacron/at/network etc. services).
I will report back tonight (it's at home and I can't test it from here
because I've removed the network).
I would suspect flakey hardware if it were random, but it's pretty consistent
at 12 minutes.
Ok, I found the problem -- it was APM. Disabling the APM daemon had no effect, though.
The BIOS had a power management option with an inactivity timeout of 10 minutes, and
with IDE power down enabled.
When I disabled power management competely in the BIOS and the problem went away.
I did not run RH 6.2 on the system so I do not know if it is an issue there.
I am marking this as WORKSFORME because there is a hardware workaround, but I note that
NT ran ok with these bios settings.