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On 2012-07-11T13:42:02+00:00 Maarten Lankhorst wrote:

I have an Intel DQ77MK motherboard, which has 2 DVI connectors, and a
Core i7 3770S IvyBridge CPU. Under Ubuntu 12.04, the multiple display
support does not work, and I am stuck with a single display. The second
screen only shows all pixels as 100% red. Enabling the second screen in
Displays in System Settings does allow me to move windows and the mouse
cursor to that screen, though I cannot actually see anything on it, as
everything is red. For now I have had to force it to mirror displays, to
avoid moving things to the second screen.

Both screens at 1280x800 works, but both screens at 2048x1152 fails,
regardless of whether using mirrored mode in Xorg.

Reply at: https://bugs.launchpad.net/xorg-
server/+bug/1021924/comments/11

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On 2012-08-22T10:43:05+00:00 Daniel-ffwll wrote:

Smells like fdi b/c link train fail again.

Can you check whether you can switch places of the monitors by switching
crtcs (with the xrandr --crtc option). But don't try to use both crtc
1&2, that will run into a hw limit that we currently don't check ...

Also, please retest on latest 3.6-rc kernels just to check, and please
attach dmesg with drm.debug=0xe and xrandr --verbose

Reply at: https://bugs.launchpad.net/xorg-
server/+bug/1021924/comments/12


** Changed in: xorg-server
       Status: Unknown => Incomplete

** Changed in: xorg-server
   Importance: Unknown => Medium

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https://bugs.launchpad.net/bugs/1021924

Title:
  Multiple Displays not working on Core i7 3770S + Intel DQ77MK
  motherboard

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