Re: [PATCH 1/4] X86: Revamp reboot behaviour to match Windows more closely

Matthew Garrett
2011-03-11T22:15:17Z

On Fri, Mar 11, 2011 at 11:08:18PM +0100, Rafael J. Wysocki wrote:
> On Friday, March 11, 2011, Matthew Garrett wrote:
> > Windows reboots by hitting the ACPI reboot vector (if available), trying
> > the keyboard controller, hitting the ACPI reboot vector again and then
> > giving the keyboard controller one last go. Rework our reboot process a
> > little to default to matching this behaviour, although we'll fall through
> > to attempting a triple fault if nothing else works.
>
> Does this fix a particular problem observed in practice?

Yup. We're seeing an increasing number of machines that don't implement
the legacy keyboard controller at all and fail to reboot if you poke it.
The expectation appears to be that you use the ACPI reboot vector on
these machines.

--
Matthew Garrett | mjg59@srcf.ucam.org