Is kvmgt display support compatible with q35?

[Yuan, Hang]

Yes, windows driver still needs Opregion to enable display. OVMF doesn't provide Opregion. So display function is disabled.

Regards,
Henry

> -----Original Message-----
> From: Zhenyu Wang [mailto:zhenyuw at linux.intel.com]
> Sent: Monday, October 15, 2018 10:29 AM
> To: Alex Williamson <alex.williamson at redhat.com>
> Cc: intel-gvt-dev at lists.freedesktop.org; Gerd Hoffmann
> <kraxel at redhat.com>; Yuan, Hang <hang.yuan at intel.com>; Zhang, Tina
> <tina.zhang at intel.com>
> Subject: Re: Is kvmgt display support compatible with q35?
> 
> On 2018.10.12 16:22:56 -0600, Alex Williamson wrote:
> > Hi,
> >
> > I've installed Windows 10 (1803 September 2018 update) into two
> > separate GVT-g VMs, one a 440FX/SeaBIOS configuration and the other a
> > Q35/OVMF configuration.  I've made the two VMs as similar as I
> > possibly can other than the machine and firmware settings.  XML for
> > each is attached.  I'm also testing Gerd's ramfb support, which
> > explains the driver override and additional hostdev ramfb option for each.
> >
> > The 440FX/SeaBIOS VM works well, I installed the 15.40.41.5058 driver
> > (host is an i7-5600U with Intel HD Graphics 5500).  I'm able to get to
> > the Intel Graphics Properties and Graphics Options menus, and
> > everything behaves as I'd expect.
> >
> > With the Q35/OVMF VM, the VM display goes blank as soon as Windows
> > updates the graphics driver after install, I need to swap to an
> > emulated graphics device and install TightVNC server in the VM for
> > access.  Installing the same driver as above does not resolve the
> > display issue.  On boot, the display via virt-manager/virt-viewer is
> > frozen with TianoCore boot graphic and halted Windows dots animation.
> > Running a Unigine test in the VM suggests the vGPU is working properly
> > (connected via in-guest VNC server), but I don't get the Graphics
> > Properties and Graphics Options menus, and of course the display
> > option seemingly stops working.  Do I have a configuration issue
> > preventing display from working properly or is there something about a
> > Q35/OVMF configuration that prevents the display from working?
> > Thanks,
> >
> 
> AFAIK, windows display still has problem with OVMF that our previous
> proposal to fix this was not taken. Cc Henry & Tina to double check.
> 
> --
> Open Source Technology Center, Intel ltd.
> 
> $gpg --keyserver wwwkeys.pgp.net --recv-keys 4D781827