[RFC PATCH v2] xfree86: add a -gpu switch to select primary gpu

[Alexander E. Patrakov]

2013/6/12 Maarten Lankhorst <maarten.lankhorst at canonical.com>:
> Well with the detection bug fixed, here's the patch in a slightly cleaned up form,
> tested with nvidia and nouveau. :-)

Also tested on my Sony VAIO VPCZ23A4R laptop. For the first time, the
AMD equivalent of Optimus worked as intended: I could assign the
Radeon card to be the primary, and send output both to the TV
connected to it via HDMI and to the eDP panel connected to the Intel
card. No dirty artifacts, unlike the "reverse optimus" solution (intel
rendering to radeon outputs) by Dave Airlie. Thanks!

Wishlist: the laptop's radeon card is actually in a dock station that
may or may not be connected on a given boot. So, I would like to use
radeon (-gpu 1) as the primary gpu only if it exists - but there is no
syntax to do that.

-- 
Alexander E. Patrakov