Re: [Xen-users] Dom0 freeze on HVM DomU Windows reboot with VGA passthrough

[Matthias <matthias.kannenberg@xxxxxxxxxxxxxx>]

Hi,

may I take an educated guess: You only see the dom0 freeze when you
are hiding 2 vgas from dom0?

Cause this is what my behaviour
(http://www.gossamer-threads.com/lists/xen/users/273630) and i've seen
this issue coming up on the mailing list by others..

Also, we got a patch for the blankscreen-on-domU-restart thing if you
are still experiancing this.. I posted it here:
http://lists.xen.org/archives/html/xen-users/2013-03/msg00127.html
(in this thread the guy has the dual vga passthrough as well, so it
might be worth reeding furthor)

Oh yeah, and one last thing: I don't know what git branch you are
using but they switched default qemu in unstable and the new
qemu-upstream has a bug so vga passthrough doesn't work with more then
4GB of Ram assigned to a domU (bug described here:
http://lists.xen.org/archives/html/xen-devel/2013-03/msg00211.html )..
so for the behaviour you are used to (using qemu-xen-traditional) you
have to now say that explicitly in your domU config)

2013/3/17 Howell Tam <pigeon@xxxxxxxxxxx>:
>
> Hi all again,
>
>
>> > have you found a solution for this behaviour? Cause I'm currently
>> > seeing a similar result with my installation.
>
>
>         I've been away for a few weeks and I'm finally back on trying to 
> figure
> out this problem.
>
>
>         I was using xl + xl pci-assignable-add when I get the full
> machine freeze when I reboot the domU windows7.
>
>
>         I just tried with the same domu config file, but with xm +
> pci-stub, and I do not seem to get the freeze (yet, so far 3 
> reboots/shutdowns).
>
>
>         The VGA passthrough (an HD7770) is still working even after the
> reboot (i.e. no more blank screen).
>
>
>         This is semi-good news. If the bug is in xl, then I guess we
> will have to debug this since xm is deprecated.
>
>
> --
> Regards,
> Howell.
>

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