Red Hat Bugzilla – Bug 36599
SMP kernel fails to reboot machine
Last modified: 2007-04-18 12:32:43 EDT
Hardware: Dell Poweredge 1300, 256MB, Dual PIII-500, PERC-2SC RAID
Rebooting the machine (either with "shutdown -r" or "reboot" or with
ctrl-alt-del) causes the machine to hang instead of resetting. The last
messages printed are:
Please stand by while rebooting the system.
stopping all md devices
At this point the machine hangs, (ctrl-alt-del has no effect) and can
only be restarted with manual intervention.
This only happens with the -smp and -enterprise kernels. The
uni-processor-only kernel functions as expected.
Can you try to use the following options as commandline options on the
They change the algorithm with which the kernel tries to reboot.
Using "reboot=b" works. All of the other reboot settings fail as desacribed
on this machine.
I'm adding "reboot=b" to lilo.conf to make it permanent.
Could you please run the attached program on your machine and attach the output
to this bug? (or mail me in private)
It will give us information (eg vendor and version) about the bios you have and
allows us to make "=b" the default for that specific bios in future kernels.
Created attachment 15786 [details]
program to dump BIOS information
Created attachment 15787 [details]
Output of the bios dump program