Linux System Rebooting

[Patrick Murphy]

I have a system running SLES90 that is rebooting irregularly. Attached is the messages file. Can someone diagnose this for me?

[Patrick Murphy]

Also attached is the dmesg output

[Matti_Kurkela]

The dmesg listing had some suggestions that look pretty clear to me:

PnPBIOS: Warning! Your PnP BIOS caused a fatal error. Attempting to continue
PnPBIOS: You may need to reboot with the "nobiospnp" option to operate stably
PnPBIOS: Check with your vendor for an updated BIOS

Have you tried doing what the system suggests?

MK

[Patrick Murphy]

This system has run very well since it was built in early 2009. I doubt that it is an issue with an option on boot now.

[Steven E. Protter]

Shalom,

Possible caused based on log analysis:

1) CPU failure. System will halt or reboot if a CPU fails. It might be coming back online after the boot.
2) Power supply issues. Sudden, unexplained reboots could indicate a power problem. Check system power supplies and simple stuff like if the physical plugs are in a good position.
3) Disk issues. There is some indication in the logs that basic commands can not be found. This could indicate a problem with the boot disk.
4) Flakey memory chip.

I would boot the system to a diagnostics CD or the built in hardware diagnostics and check all the hardware

SEP