SMP system not running SMP

John Baldwin jhb at
Fri Jun 23 17:16:08 UTC 2006

On Friday 23 June 2006 12:52, Pete French wrote:
> > Erm, ok.  Can you get the mptable output and a verbose dmesg with the SCSI 
> > card in the box and an i386 SMP kernel?
> Possibly - booting the SMP kernel with the SCSI card in the box means
> booting in safe mode though, or it just wont come up. I am remote to the
> box currently, but here is the mptable output from it booted with a
> non-SMP kernel if that helps ?

Ok, when you boot in safe mode, you don't just disable ACPI, you also disable 
APIC which has the side effect of disabling SMP.  Try breaking into the boot 
loader prompt at the menu and just doing:

'ok set hint.acpi.0.disabled=1'
'ok boot'

and seeing if that gives you SMP.

John Baldwin

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