Reboot issue

Roland Smith rsmith at
Tue Apr 3 20:39:06 UTC 2007

On Tue, Apr 03, 2007 at 08:37:26PM +0200, alma at wrote:
> Dear,
> I am having a "spontaneous" reboot issue and I really dunno what to  
> do.. here is which message I get from logs .. any hints what it might  
> be ??

These aren't "spontaneous" reboots. They're kernel panics.

> Apr 3 06:50:44 hope kernel: Trying to mount root from ufs:/dev/ad0s1a
> Apr 3 06:50:44 hope kernel: WARNING: / was not properly dismounted

This is because the machine rebooted without unmounting the
filesystems. It will do a background fsck later.

> Apr 3 06:50:44 hope savecore: reboot after panic: page fault
> Apr 3 06:50:44 hope savecore: writing core to vmcore.3

This means that the reboot was caused by a page fault. A core file was
saved (to /var/crash by default), so you can feed it to the kernel
debugger kgdb(1) to see what caused the page fault.

See chapter 10 of the developers handbook on how to debug a crash
dump. Copy the output that kgdb generates when starting up, and the
output of the 'backtrace' (or 'bt') command and post them here, or on
the hackers list.

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