AMD/AMD hybrid graphics

[Michel Dänzer]

On Mit, 2014-02-19 at 09:11 +0100, Boszormenyi Zoltan wrote:
> 
> On second thought, the usage of VESA for installation and then
> switching to KMS might have caused the mixed behaviour, i.e. that
> the kernel recognized and initialized both chips but X used only the
> integrated one. But I don't want to reinstall the system to test
> this theory.

I doubt it would make any difference.


> Now, with the "Switchable" state, RADEON(0) lines (for ARUBA) and
> RADEON(G0) lines (for HAINAN) are present.
[...]
> I would like to have PRIME functional so I will need to set "Switchable
> Graphics" in the BIOS. What xorg.conf magic should I add to make it
> use the ARUBA chip for display but still keep HAINAN active for PRIME?

According to the screen enumeration above, that's already the case.

https://bugs.freedesktop.org/show_bug.cgi?id=69694 may be helpful for
troubleshooting the crash.


> Can Mesa/Xorg use both r600g and radeonsi at the same time?

Yes, that seems to work fine for others. You may need Mesa 10.1 or newer
though.


-- 
Earthling Michel Dänzer            |                  http://www.amd.com
Libre software enthusiast          |                Mesa and X developer