Re: [libvirt] [PATCH] qemu: qxl devices don't support multifunction yet
On Tue, Sep 20, 2011 at 02:41:44PM +0200, Marc-André Lureau wrote:
Hi
On Tue, Sep 20, 2011 at 3:11 AM, Wen Congyang <wency(a)cn.fujitsu.com> wrote:
>
> So I think qxl device supports multifunction.
>
It works on Linux, but not on Windows. It is most likely a driver bug,
but nobody so far found a solution.
Using windows kernel debugger, the only "interesting" message I could find is:
"VIDEOPRT: Multifunction board not allowed to start"
Now that I see it a second time, this looks obviously like a problem with the
built in videoprt.sys, so nothing we can fix without rewriting our driver to
use the newer WDDM framework, and that would not work for XP anyway. I would
look for documentation on videoprt.sys limitations.
(I compared windows kernel log of various pnp/pci/video mask with
and
without multifunction qxl, it didn't help me to find why windows
refuse to start it)
regards
--
Marc-André Lureau
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