Bug 15588 - Unexplained system reboot after 12 minutes of inactivity
Summary: Unexplained system reboot after 12 minutes of inactivity
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: kernel
Version: 7.0
Hardware: i386
OS: Linux
Target Milestone: ---
Assignee: Michael K. Johnson
QA Contact:
URL: http://www.graflex.org/pinstripe-mess...
Depends On:
TreeView+ depends on / blocked
Reported: 2000-08-07 00:25 UTC by Leigh L. Klotz, Jr.
Modified: 2008-05-01 15:37 UTC (History)
0 users

Clone Of:
Last Closed: 2000-08-08 18:17:29 UTC

Attachments (Terms of Use)
output of last (16.80 KB, text/plain)
2000-08-07 05:49 UTC, Leigh L. Klotz, Jr.
no flags Details

Description Leigh L. Klotz, Jr. 2000-08-07 00:25:33 UTC
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.

Comment 1 Leigh L. Klotz, Jr. 2000-08-07 05:47:45 UTC
Actually, I now see that it's been rebooting a lot and I didn't notice.  I was not running anything on it.

Comment 2 Leigh L. Klotz, Jr. 2000-08-07 05:49:28 UTC
Created attachment 2154 [details]
output of last

Comment 3 Leigh L. Klotz, Jr. 2000-08-07 18:21:57 UTC
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.

Comment 4 Alan Cox 2000-08-08 00:29:14 UTC
Is this an i820 or i840 based motherboard with SDRAM rather than RAMBUS memory>

Comment 5 Leigh L. Klotz, Jr. 2000-08-08 18:17:27 UTC
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.

Comment 6 Leigh L. Klotz, Jr. 2000-08-09 06:31:36 UTC
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.

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