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.