Re: [Xen-users] SPICE with Upstream QEMU and qxl VGA cause Windows BSOD

[Dario Faggioli <raistlin@xxxxxxxx>]

On gio, 2013-06-27 at 10:06 +0800, kevin.zhang@xxxxxxxxxxx wrote:
> Hi all,
Hi,
 
>        These days I installed xen 4.3 unstable from source and
> recompiled qemu upstream  with spice support.
>        After xl create , the windows domU started successfully and
> spice client can visit the VDI. However, it display blue screen
> before entering the windows welcome screen.
>        Is it a bug in current upstream qemu support?
> 
Well, the basics of SPICE/qxl support should all be in Xen 4.3. However,
there is a bug triggered by some, well, emulation issues (it's a SSE
instruction emulation and then communication with qemu, there's a thread
on xen-devel about this).

That's why we have that patch in the tree that jacek is talking about.
In fact, the Xorg qxl driver was triggering right that situation,
leading to a crash.

So, officially, SPICE support is _not_ in 4.3, as that bug was
discovered too late in the release cycle. It's on the agenda already for
4.4, though. :-)

However, since I think we're talking about Windows, aren't we?, if
reverting the patch works for you, that would be a fine path to go, I
guess... Perhaps the Windoes qxl driver does not use the critical SSE
instruction.

Regards,
Dario

-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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