Re: [Xen-devel] [patch]Add a new reboot method

[Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>]

On Thu, 29 May 2008 14:30:04 +0100
Keir Fraser <keir.fraser@xxxxxxxxxxxxx> wrote:

> On 29/5/08 14:09, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:
> 
> >> You might want to boot a 32bit kernel and try acpi=off, if that does the
> >> trick then its (another) ACPI bug and the cf9 is red herring ?
> > 
> > As Keir also pointed out, there's no ACPI involved in rebooting. I also
> > did verify (in a 32-bit kernel) that it's the keyboard boot sequence that
> > causes the machine to hang.
> 
> ACPI *can* be involved in rebooting though, via FADT's RESET_REGISTER.
> Question is: why does Linux ignore this reboot method? 

It doesn't. Well at the least upstream version doesn't. We default to
keyboard currently but that probably wants reconsidering for modern
systems.

Alan

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel