So, in a similar vein to the other hardware debugging issues that
have been discussed here, does anyone have recommendations for
debugging when a system spontaneously reboots?
The basic result is as if someone hit the reset button. Now, unless
the reset button on the case is actually triggering somehow (why
would it?), what could be causing this?
It's driving me absolutely batty, because it started on Tuesday,
apparently in the morning:
[EMAIL PROTECTED](pts/2):~ 4 > last reboot
reboot system boot 2.6.20-16-generi Wed Oct 3 07:20 - 11:13 (03:53)
reboot system boot 2.6.20-16-generi Wed Oct 3 00:56 - 00:57 (00:00)
reboot system boot 2.6.20-16-generi Wed Oct 3 00:47 - 00:54 (00:06)
reboot system boot 2.6.20-16-generi Wed Oct 3 00:31 - 00:31 (00:00)
reboot system boot 2.6.20-16-generi Tue Oct 2 23:30 - 00:31 (01:01)
reboot system boot 2.6.20-16-generi Tue Oct 2 23:19 - 23:29 (00:09)
reboot system boot 2.6.20-16-generi Tue Oct 2 21:24 - 23:29 (02:05)
reboot system boot 2.6.20-16-generi Tue Oct 2 11:47 - 23:29 (11:42)
reboot system boot 2.6.20-16-generi Tue Oct 2 10:46 - 23:29 (12:42)
reboot system boot 2.6.20-16-generi Tue Oct 2 09:46 - 23:29 (13:42)
reboot system boot 2.6.20-16-generi Tue Oct 2 08:46 - 23:29 (14:43)
reboot system boot 2.6.20-16-generi Tue Oct 2 07:46 - 23:29 (15:43)
I've checked last month's wtmp for reboot entries, and there's
nothing aside from when I know I've restarted the system.
To top it all off, this is my MythTV system, and these antics have
interfered with recording schedules that we've pulled off of the TiVo
(guess I visit the iTunes store?).
I've pulled the machine (new everything, all purchased, assembled and
installed ~1 month ago) out of the cabinet, cleaned all the dust off
the air intake screens, adjusted the intake fans up a notch (from
"low" to "medium"; I love these Antec Tri-Cool fans) to increase
airflow through the case. I went into the BIOS and told it to be
more aggressive with the control of the CPU cooler's fan.
While I was there, I checked the temps. everything was ~30-33 C, but
MCH and ICH zones were 67 and 66 C, respectively. Are these the CPU
core temps? This is a Q6600 (i think) Core 2 Quad 2.4GHZ part. Am I
not getting enough cooling? The heatsink fins are warm to touch, but
not unbearably hot.
I tried to install lm-sensors, but sensors-detect detected no
sensors. It's possible the latest code from upstream might support
my motherboard (Intel DP35DPM), but what's included with Ubuntu 7.04
does not. Didn't have time to investigate further.
Is my power supply glitched? This particular case orients the PSU so
that it's fan draws air from directly outside the case via its own
intake screen... This was caked with dust (hooray SoCal air!), which
I wiped off the screen. Do modern PSU's have a thermal cut-out that
prevent them from powering up the box or cut power to a running
system if it's too hot?
I ran a memtest86+ overnight, and the RAM came up clean.
The vendor did a burn-in test on the CPU/Mobo/RAM combo before
shipping it. It's been running non-stop for over a month without
problem...
Do I just need to do a monthly dusting & blow-out? (Or move into an
hermetically-sealed house?)
Frustrating.
Gregory
--
Gregory K. Ruiz-Ade <[EMAIL PROTECTED]>
OpenPGP Key ID: EAF4844B keyserver: pgpkeys.mit.edu
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