Re: [Xen-devel] RE: [RFC][QEMU] ATI graphics VBIOS passthru support

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Fri, Oct 08, 2010 at 10:41:06AM -0400, djmagee@xxxxxxxxxxxx wrote:
>    Wei,
> 
>                    I've tested with a Radeon 4770 and it the VBIOS works
>    without a problem, through many guest (re)boots, so it seems pretty
>    solid.  I tested a linux guest (fairly standard Fedora 12), Windows XP,
>    and Windows 7 (without accelerated drivers).  The open radeon linux driver
>    works fine.
> 
> 

I added this (and other) tested adapters to:
http://wiki.xensource.com/xenwiki/XenVGAPassthroughTestedAdapters

-- Pasi

> 
>    The Catalyst driver fails in Windows XP (STOP 0x000000EA, thread stuck in
>    device driver), windows 7 (STOP 0x00000116, driver fails to properly
>    reset?), and linux (total system freeze).  This seems to be different than
>    the `Blank Screen' problem you report, as the driver is clearly not
>    functioning properly.
> 
> 
> 
>    Doug Magee
> 
> 
> 
>    From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
>    [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Huang2, Wei
>    Sent: Friday, October 08, 2010 9:57 AM
>    To: Kay, Allen M; Ian Jackson
>    Cc: Xen-devel
>    Subject: [Xen-devel] RE: [RFC][QEMU] ATI graphics VBIOS passthru support
> 
> 
> 
>    Hi Allen,
> 
> 
> 
>    Yes, Catalyst driver is the one from public website. The driver still has
>    a  minor issue with this VBIOS patch. The purpose of submitting VBIOS
>    patch is to get community feedbacks. After we figure out the root cause of
>    black screen, I will formally submit a patch for inclusion.
> 
> 
> 
>    Thanks,
> 
>    -Wei
> 
> 
> 
>    From: Kay, Allen M [mailto:allen.m.kay@xxxxxxxxx]
>    Sent: Friday, October 08, 2010 2:21 AM
>    To: Huang2, Wei; Ian Jackson
>    Cc: Xen-devel
>    Subject: RE: [RFC][QEMU] ATI graphics VBIOS passthru support
> 
> 
> 
>    Hi Wei,
> 
> 
> 
>    Is Catalyst driver the one on AMD website?  I think that's what I have in
>    my win7 guest and it matches the symptom you are describing.  "lspci"
>    reports my ATI card is a V5700 - although it says v3750 on the box.  Where
>    can I get a working driver?
> 
> 
> 
>    The patch looks reasonable to me in general.
> 
> 
> 
>    Allen
> 
> 
> 
>    From: Huang2, Wei [mailto:Wei.Huang2@xxxxxxx]
>    Sent: Thursday, October 07, 2010 9:06 PM
>    To: Kay, Allen M; Ian Jackson
>    Cc: Xen-devel
>    Subject: RE: [RFC][QEMU] ATI graphics VBIOS passthru support
> 
> 
> 
>    Hi Allen,
> 
> 
> 
>    Thanks for testing it out. We have tested this patch with Radeon 4850,
>    4870, FirePro V5700 and FirePro M5800. Unfortunately we don't have V3750
>    at hand. It is very possible this patch isn't compatible with V3750. We
>    will try to get hold of one for debugging. For graphics which work with
>    this path, users should be able to get rid of emulated gfx (such as
>    Cirrus). I have successfully installed a Windows guest VM using this
>    patch.
> 
> 
> 
>    I also want to point out that there is still an issue. Users will see a
>    black screen after installing Catalyst driver. Even though the screen
>    appears to be black, the driver is actually functioning correctly (3DMark
>    can be run with external monitor). Our driver team is currently debugging
>    it and they believe this is easy to fix.
> 
> 
> 
>    What is your opinion on this patch (and the solution) in general?
> 
> 
> 
>    -Wei
> 
> 
> 
>    From: Kay, Allen M [mailto:allen.m.kay@xxxxxxxxx]
>    Sent: Thursday, October 07, 2010 6:58 PM
>    To: Huang2, Wei; Ian Jackson
>    Cc: Xen-devel
>    Subject: RE: [RFC][QEMU] ATI graphics VBIOS passthru support
> 
> 
> 
>    Hi Wei,
> 
> 
> 
>    This patch did not cause any problems with Intel IGD passthrough for me.
>    However, the monitor remained blank if I pass through ATI Firepro V3750
>    either as the primary display device or the secondary device
>    (gfx_passthru=1/0).  Passing it through as the secondary device used to
>    work.
> 
> 
> 
>    Have you tested the patch with this graphics card?
> 
> 
> 
>    Allen
> 
> 
> 
>    From: Huang2, Wei [mailto:Wei.Huang2@xxxxxxx]
>    Sent: Thursday, October 07, 2010 9:57 AM
>    To: Ian Jackson
>    Cc: Xen-devel; Kay, Allen M
>    Subject: [RFC][QEMU] ATI graphics VBIOS passthru support
> 
> 
> 
>    Hi Ian,
> 
> 
> 
>    There have been a lot of interest on gfx passthru recently. This patch
>    enables ATI VBIOS in passthru mode. The guest VM system BIOS (including
>    Windows boot logo) can now show in passthru screen. We have tested with
>    various Windows and Linux guest VMs. Please help review it. We are also
>    looking forward to comments and suggestions from Xen community users.
> 
> 
> 
>    Signed-off-by: Wei Huang <wei.huang2@xxxxxxx>
> 
>    Signed-off-by: Wei Wang <wei.wang2@xxxxxxx>
> 
> 
> 
> 

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