Re: kvm tools: rhel6.0 guest hung during shutdown

[Gleb Natapov <gleb@redhat.com>]

On Mon, Apr 11, 2011 at 11:28:22PM +0400, Cyrill Gorcunov wrote:
> On 04/11/2011 11:07 PM, Gleb Natapov wrote:
> > On Mon, Apr 11, 2011 at 10:01:30PM +0300, Pekka Enberg wrote:
> >> On Sun, 2011-04-10 at 16:58 +0300, Gleb Natapov wrote:
> >>> On Sun, Apr 10, 2011 at 09:49:31PM +0800, Amos Kong wrote:
> >>>> System halted.
> >>>> [note: guest hung .......]
> >>>>
> >>> Isn't that expected result without ACPI support? I would expect all guests
> >>> to hang like that at the end.
> >>
> >> I see hangs with Debian Squeeze image too but not with the minimal QEMU
> >> image I usually test things with. I wonder, though, why userspace
> >> insists on using ACPI for shutdown as we boot with 'noapic'.
> >>
> > There is not way to power down PC from software without ACPI (may be APM
> > has something, but I doubt kvm-tool implements it either). Do you remember
> > Windows 95 "it is now safe to turn off your computer" screen? 
> 
> yup, iirc APM had some set power state entry point, but not sure, need to find docs ;)
> 
Just go for ACPI then. APM is dead.

--
			Gleb.