On Mon, 28 Oct 2013 16:29:49 -0500 John Wargo wrote;
>I dont want primary passthrough, im currently just trying for secondary..
>
>On Monday, October 28, 2013, Gordan Bobic <gordan@xxxxxxxxxx> wrote:
>> I'd focus more on why exactly do you think you need primary passthrough. Is your requirement
>>for seeing the SeaBIOS POST and the Windows loading animation strong enough to bother with
>>the amount of extra pain that it is going to require?
And on Sunday, October 27, 2013 10:28 AM John Wargo also wrote;
> I though that secondary passthrough meant that it would pass the virtual adapter in as primary,
>but I could use my GPU that I passed through, so where am I wrong, and how do I do that?
John,
Iâm not totally clear what you are trying to accomplish. Let me start with some groundwork and you can
help me from there.
You have 2 adapters; Radeon HD 6670 and Radeon HD 7850
Correct me if I am wrong but it sounds like you have booted on the 6670.
This make the 6670 the primary (VGA boot adapter) and the 7850 is the secondary adapter.
6670 = primary
7850 = secondary
There are 4 possible adapter configurations for DomU;
-
Pass through primary as primary (6670 is primary in DomU)
-
Pass through primary as secondary (6670 is secondary in DomU, Cirrus emulated is primary)
-
Pass through secondary as primary (7850 is primary in DomU)
-
Pass through secondary as secondary (7850 is secondary in DomU, Cirrus emulated is primary)
You said you wanted Dom0 = 6670 and DomU = 7850.
Looking at the list above, there are two possible configurations for the 7850 in DomU; 7850 as primary or
7850 as secondary.
If you set âgfx_passthru=1â in your .cfg file for DomU you will pass the 7850 through as a primary. This means
that the DomU will use the 7850 as a boot VGA adapter. Your desktop will be accelerated using the 7850.
If you set âgfx_passthru=0â in your .cfg file for DomU you will pass the 7850 through as a secondary. This means
that the DomU will use the Cirrus emulated VGA VBios as the boot device. Your desktop will use the emulated
adapter and the 7850 will be a secondary (extended) adapter.
So, the question is; what are you trying to accomplish?
Thanks,
Kelly
