[VT-d reboot problems] Re: [PATCH] x86 / reboot: Blacklist DellOptiPlex 990 known to require PCI reboot

[Ingo Molnar]

(added KVM folks to the Cc:)

* Bastien ROUCARIES <roucaries.bastien@xxxxxxxxx> wrote:

> Ping^2
> 
> Bastien
> On Mon, Jan 23, 2012 at 11:28 AM, Bastien ROUCARIES
> <roucaries.bastien@xxxxxxxxx> wrote:
> > On Mon, Jan 16, 2012 at 8:21 PM, H. Peter Anvin <hpa@xxxxxxxxx> wrote:
> >> On 01/16/2012 03:27 AM, Bastien ROUCARIES wrote:
> >>>>
> >>>> Does it work if you disable VT-d in the firmware? If so, then adding it
> >>>> to the reboot method blacklist is the wrong fix - we need to figure out
> >>>> why VT-d interferes with Dell's reboot code.
> >>>
> >>> Yes it work
> >>>
> >>
> >> This is particularly so since we are very close to having a full Dell
> >> model catalogue in the kernel...
> >
> > Ping ? Do you need some dump ? testing ?

So disabling VT-d in the BIOS fixes the reboot problem and 
Matthew Garrett suggests we should figure out why and how VT-d 
on this Dell box interferes with the reboot method.

Thanks,

	Ingo
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