[Bug 41265] KMS does not work on Radeon HD6700M

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=41265

--- Comment #3 from Varban <weasalandme at yahoo.com> 2011-09-29 12:26:16 PDT ---
(In reply to comment #2)
> You most likely have a mux-less system 

I'm not so sure about that.
First off, the ATI card is in a "Media Dock" which is not part of the laptop
and is connected via Intel's Thunderbolt connector.
Second, the laptop and media dock have separate vga/hdmi ouputs, the HDMI on
the media dock doesn't work, the HDMI on the laptop always works so I suspect
the HDMI ports are not on a shared bus.
Third, in Windows, when a monitor is connected to the media dock it shows as
connected to the ATI card (according to the hardware info) while the laptop
screen is shown as connected to the Intel card.
And lastly, from the attached log:

[drm:intel_dsm_platform_mux_info], MUX info connectors: 7
[drm:intel_dsm_platform_mux_info], Connector id: 0x0000000080010100
[drm:intel_dsm_platform_mux_info],   port id: Analog VGA
[drm:intel_dsm_platform_mux_info],   display mux info: MUXed between iGPU and
dGPU
[drm:intel_dsm_platform_mux_info],   aux/dc mux info: MUXed between iGPU and
dGPU
[drm:intel_dsm_platform_mux_info],   hpd mux info: unknown

I am not so certain this is really a hybrid system in the sense we've seen so
far. I think the cards might be separate and drive the monitors independently.
This would mean that I don't need vgaswitcheroo to switch to the radeon card
and would be able to just use xinerama with 2 cards.

I will try to connect 2 different monitors to the 2 HDMI ports tonight and see
what windows thinks is connected to what.

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