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Re: [Xen-devel] ACPI shutdown unreliable with win7?

On 05/29/15 10:49, Ian Campbell wrote:
> On Fri, 2015-05-29 at 15:40 +0100, Jan Beulich wrote:
>>> I've mentioned it at least twice now but nobody seems to think it is of
>>> note that even with the current settings it does the right thing about 1
>>> time in 10? Is Win7 really expected to behave so randomly here? 
>> Perhaps not expected, but then I also don't think we install all the
>> latest bits, but whatever is on the install media? I know I've seen the
>> default action preselected for the user to be different on different
>> instances of native hardware Win7 installs (but of course that could
>> as well have been due to firmware differences, albeit I doubt there's
>> many moder systems around that don't support both S3 and S4).
> OK, so the gist I'm getting is that it's quite possible that Win7
> actually does just roll a d20 and only hibernate on a prime number...

I would expect that this is a uninitialized variable path in Win7 on the
virtual hardware config (the roll a d20).  Since it looks like you can
do things in the guest, a better thing would be to force the action to
do on the power button press.

I just found a web page


That says there are BIOS settings that Win7 will also look at.  Could be
the colo needs some changes

   -Don Slutz

>>> Also, when the test fails the guest is also not hibernating either.
>> Would we have ways to tell it at least tried to enter e.g. S3?
> I'm not sure, but it's not apparent in the screen shot nor in any of the
> logs (qemu etc), I think I'd expect to see _something_ there?
>>> Plus I've queried the impact of change the ACPI s3/s4 settings on the
>>> save/restore/migrate tests in the flight more than once and nobody has
>>> responded to that either.
>> I have no idea, and hence didn't respond to that part.
> OK, thanks.
> Ian.
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