[Bug 59431] [snb efi gmux] imac 12,1 blank screen upon booting

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=59431

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[snb efi] imac 12,1 blank   |[snb efi gmux] imac 12,1
                   |screen upon booting         |blank screen upon booting

--- Comment #15 from Chris Wilson <chris at chris-wilson.co.uk> ---
Ok, this is the apple gmux. The display is connected to the discrete radeon GPU
and you need to manually switch it over to the igfx (using the mux). That it is
blank upon booting is because not only is the video muxed, so are the control
lines which are still being reversed engineered as to how to setup the gmux.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20130116/cd4e8700/attachment.html>