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Re: [Xen-devel] Re: Patches for VGA-Passthrough XEN 4.2 unstable

To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] Re: Patches for VGA-Passthrough XEN 4.2 unstable
From: Tobias Geiger <tobias.geiger@xxxxxxxxx>
Date: Wed, 14 Sep 2011 18:10:05 +0200
Cc: Liwei <xieliwei@xxxxxxxxx>
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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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