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Re: [Xen-devel] [Xen-users] [REQUEST] Request for Xen Users to Attempt Jean David Techer's Xen 4.2-unstable VGA Passthrough Documentation


does such patch exists?Â
i am working on this for quite some time now, and didn't came across any ATI patch, only for nvidia
as i understand that ATI should work out of the box or am i mistaking?Â

Best Regards,
Kristijan LeÄnik

On Sat, Mar 31, 2012 at 1:19 PM, Pasi KÃrkkÃinen <pasik@xxxxxx> wrote:
On Sat, Mar 31, 2012 at 01:06:37PM +0200, Kristijan Le??nik wrote:
> Â ÂHi,
> Â Âi was looking hard to get this thing working, and i somehow manage to get
> Â Âtwo ATI graphic card working under Windows 7 and Debian 6 DomU,
> Â Âwhat i learn from all this trying, that the most important thing is the
> Â Âmotherboard!
> Â Âi had i7 860 with VT-D, but it was hard to find working VT-D motherboard,
> Â Âi try gigabyte P55-USB3 with beta bios from gigabyte and i got working 3D
> Â Âdrivers for a few minutes and then the DomU would crash,
> Â Âthen i wanted to try asus, but they said that P55 chipset doesnt support
> Â ÂVT-D functions, then i look what David uses and get a MSI motherboard and
> Â Âits default bios has got VT-D to enable/disable
> Â Âcurrenty i have:
> Â Âi7 860
> Â ÂMSI P55 GD85
> Â ÂATI H6670 - working 3D
> Â ÂATI H5830 - working 3D
> Â ÂDebian 6.0, custom kernel 3.1
> Â ÂXen 4.2 unstable ( from repo 2. march? )
> Â ÂWindows 7 64bit - virtual
> Â Âno extra patches
> Â Âbut how i get it to work is strange, if i enable #gfx_passthru=1 then
> Â Âvirtual machine wont start

gfx_passthru=1 makes the passthru gfx card primary in the VM,
so you need the additional ATI gfx passthru patch so that the VBIOS passthru works.

without gfx_passthru=1 the virtual emulated gfx is primary.

-- Pasi

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