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Re: [Xen-devel] [Xen VGA Passthrough] Cannot Complete All 3dmark Tests in Windows 8 HVM domU

  • To: Gordan Bobic <gordan@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>
  • From: "Zytaruk, Kelly" <Kelly.Zytaruk@xxxxxxx>
  • Date: Wed, 17 Sep 2014 17:49:23 +0000
  • Accept-language: en-US
  • Cc: "Hurwitz, Sherry" <sherry.hurwitz@xxxxxxx>
  • Delivery-date: Wed, 17 Sep 2014 17:49:48 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xen.org>
  • Thread-index: AQHPzEclebOQOpQl7kWpNbSzKgVct5v5RSqA///NV1CAAZBcgIAAJMOwgAG9AAD//77c4IABSqOAgAgVt7A=
  • Thread-topic: [Xen-devel] [Xen VGA Passthrough] Cannot Complete All 3dmark Tests in Windows 8 HVM domU


Can you tell me exactly what the problem is that you are seeing that prompted 
you to ask for a bus reset?  I am trying to reproduce your issue but I am not 
having any luck.  I tried a few different scenarios ranging from clean shutdown 
to destroying the domain with 'xl des 5' and restarting.  In all cases I was 
able to cleanly reboot with the graphics driver enabled.

I am testing with Win7 as the guest OS with Xen 4.2 and Linux 3.4.9.  Graphics 
card is 'AMD Radeon R9 200' on an AMD Kaveri APU.

What are your exact repro steps and are you using any graphics/pci related 


> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxx [mailto:xen-devel-
> bounces@xxxxxxxxxxxxx] On Behalf Of Gordan Bobic
> Sent: Friday, September 12, 2014 6:11 AM
> To: xen-devel@xxxxxxxxxxxxx
> Subject: Re: [Xen-devel] [Xen VGA Passthrough] Cannot Complete All 3dmark
> Tests in Windows 8 HVM domU
> On 2014-09-11 19:35, Zytaruk, Kelly wrote:
> > I myself am still using Win7  in the DomU and have not yet
> > experimented with Win8.1.  I find Win7 very stable and it has not
> > given me any problems as a guest OS.
> Ooo, an actual AMD person on the list! :D
> Speaking if ongoing problems, any chance of a few fixes and feature un-
> removals in the Windows driver?
> 1) Issue a bus reset to the device at driver load/unload time to remove the 
> need
> to eject the device at shutdown when running virtualized. I cannot be the only
> one cursing having no choice but to use Nvidia cards if I need to be able to
> seamlessly reboot my domUs with GPUs. I had a pair of R9 290X cards and had
> to trade them in for 780Tis.
> 2) Expose stretched desktop modes to full screen DirectX apps.
> I couldn't get anything working in 3840x2400 because my monitor shows up as
> two separate 1920x2400 screens. The highest resolution desktop stretch mode
> available was, IIRC, 3200x900 which is quite useless. The problem will only 
> get
> bigger with the newly announced 5120x2880 monitor from Dell that will show
> up as 2x 2560x2880 over two DP inputs.
> For bonus points:
> 3) Make the driver do what the monitor driver says, rather than always blindly
> following what EDID says
> 4) Make the driver not crash with R9 cards on NF200 PCIe bridges. HD7970
> works, so why don't R9s?
> I would love dearly to be able to switch to AMD GPUs, but the drivers just 
> don't
> meet the minimum usability requirements.
> Gordan
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