[Xen-users] Re: [Xen-devel] Re: VGA passthrough on unstable

[Liwei <xieliwei@xxxxxxxxx>]

Hello Pasi, list,
    Just to update that the ATI passthrough patch works fine on the HD
6870 (Yeah, went ahead and bought one). On the vanilla xen, it almost
works (with quirks) as a secondary adaptor (i.e. gfx_passthrough = 0).
    This is after a few hours "testing" out both setups (patch and
vanilla) using Portal 2. The game did crash once every 20 minutes or
so using the vanilla xen, but was absolutely stable using the patch.
3DMark05 gave a score of about 18400 in both setups, which seem
congruent with the scores from this graphics chip.
    So IMHO, if anybody wants to do graphics passthrough, definitely
go for an ATI card.


On 24 May 2011 23:49, Liwei <xieliwei@xxxxxxxxx> wrote:
> On 24 May 2011 23:43, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
>>
>> Hello,
>>
>> Did you take a look at this patch? 
>> http://lists.xensource.com/archives/html/xen-devel/2010-12/msg00705.html
>> It supports dynamic detection of BARs and might help you (if you're not 
>> using it already).
>>
>> -- Pasi
>>
>
> Yes I did, but it seems that the BAR detection would only work on ATI
> based cards?
>
> Come to think of it, the decision to get a Nvidia card was probably a
> mistake. Seeing how most successful configurations are using ATI
> cards, I'm thinking of getting an ATI card instead.
>
> In case I do, any AMD/ATI engineer can confirm if a HD 6870 or 6850 is 
> workable?
>

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