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

["kevin.zhang@xxxxxxxxxxx" <kevin.zhang@xxxxxxxxxxx>]

ï

Hi Darioï

 

     Though I had no enough time recompile xen unstable, I made the windows domU running successfully yesterday.

I noticed that all windows domU image installed under traditional qemu-dm will have BSOD if switched to upstream qemu, even without qxl vga setting.

My workaround is :

    Firstly boot windows domU image with traditional qemu-dm , install spice guest tools,

    Then,  switch to upstream qemu with the same windows image,

    This time , windows domU will boot sucessfully.

    Is there any explanation on this problem? How can I directly boot old images with upstream qemu.

 

---

Best Regards

From: Dario Faggioli

Date: 2013-06-27 17:35

To: kevin.zhang

CC: xen-users; George Dunlap; PasiKÃrkkÃinen

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

On gio, 2013-06-27 at 11:18 +0200, Dario Faggioli wrote:

> 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. :-)

> 

Actually, SPICE support is indeed there, it is _only_ qxl support that

was causing the crash and that has been reverted by the said commit.

 

Sorry for the mixup. :-P

 

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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