[LAU] random system lockups, memtest clean, no idea... Magic sysrq?

Hey LADs,
My machine sometimes locks up. No oops, no instant reboot, but mouse
doesn't move, usb keyboard lights go out and nothing responds. Magic
SysRQ doesn't seem to work though i haven't tried plugging keyboard in
via ps2 instead of usb.

I ran memtest86+ for 2 nights with no errors reported. I've done smart
tools self test on both hard drives, no errors.

Temps appear normal.

Sys Temp: +33.0°C (high = +1.0°C, hyst = +9.0°C) ALARM sensor
= thermistor
CPU Temp: +17.0°C (high = +80.0°C, hyst = +75.0°C) sensor = diode
AUX Temp: +117.0°C (high = +80.0°C, hyst = +75.0°C) ALARM sensor
= thermistor
cpu0_vid: +1.063 V

coretemp-isa-0000
Adapter: ISA adapter
Core 0: +39.0°C (high = +82.0°C, crit = +100.0°C)

coretemp-isa-0001
Adapter: ISA adapter
Core 1: +40.0°C (high = +82.0°C, crit = +100.0°C)

coretemp-isa-0002
Adapter: ISA adapter
Core 2: +36.0°C (high = +82.0°C, crit = +100.0°C)

coretemp-isa-0003
Adapter: ISA adapter
Core 3: +38.0°C (high = +82.0°C, crit = +100.0°C)

Any idea what i can check next?

hddtemp /dev/sda
/dev/sda: ST380817AS: 25°C
hddtemp /dev/sdb
/dev/sdb: WDC WD3000JD-22KLB0: 31°C

My graphics card temp seems normal too, around 40 - 50 degrees

What else can i test, it seems to occur gaming under windoze as well,
but i'm not sure if random crashes are normal there. Is there tests
for cpu/NIC? Or is it hd/ram and i just haven't seen issues in those
tests. Could this be related to the RT kernel? Any way to get more
debugging info?

Loki
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Received on Wed Nov 19 00:15:04 2008