Xen devel - Sep 2011 - Re: Re: Patches for VGA-Passthrough XEN 4.2 unstable

On 12 September 2011 20:50, Tobias Geiger <tobias.geiger@vido.info>
wrote:
> Am Freitag 09 September 2011, 13:31:19 schrieb Liwei:
>> Personally I''m having positive experiences with AMD cards.
Currently
>> running two ATI 6870s in a 64-bit Windows 7 DomU. Best thing is,
>> they''re working alright without any patches on xen-unstable.
However,
>> similar to what you have experienced, DomU cannot be restarted in this
>> configuration. It can be fixed, but I haven''t got the time to
get down
>> to it.
>
> Can you elaborate a little further what needs to be done to fix this
problem?
>
> It hits me nearly every day (windows still likes to reboot after nearly
every
> windows update, so...).
>
> Best regards
> Tobias
>
Actually I''m living with it currently. Disabled automatic reboots and
manually reboot the system at a convenient time. It''ll be sweet to fix
it, but I just don''t have the time now.

I do know that reboots with VGA/PCI passthrough worked at one point in
the past with older kernel and xen versions, but something in the new
versions have broken that. So if you really need to and have the time,
try testing older (I think it was sometime in March or April)
versions.

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Am Montag, 12. September 2011, 14:59:46 schrieb Liwei:
> Actually I''m living with it currently. Disabled automatic reboots
and
> manually reboot the system at a convenient time. It''ll be sweet to
fix
> it, but I just don''t have the time now.
yep, same here. this helps, but sometimes it'' be really helpful to be
able to
reboot domu without having to reboot dom0 also...
> 
> I do know that reboots with VGA/PCI passthrough worked at one point in
> the past with older kernel and xen versions, but something in the new
> versions have broken that. So if you really need to and have the time,
> try testing older (I think it was sometime in March or April)
> versions.
that depends on what you mean with "reboot worked":
the best i had (with earlier xen patchset, thats correct) was that the 
rebooted windows domu was worked perfect except for the passed-through 3d 
card: after the reboot the performance was lousy, whyever but it never raised 
its memory clock, and so was stuck in the lowest performance mode.
with current patchset of xen it the rebooted domu crashes as soon as the gfx 
card is accessed, i.e. when the login-screen of windows appears...

so a permanent yes-rebooting-domu-is-fine fix is really appreciated here ;)

Greetings
Tobias

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