*** This bug is a duplicate of bug 745112 ***
https://bugs.launchpad.net/bugs/745112
Alright, well it is an experimental kernel and likely has its own new
bugs it brings, but we should stay focused on the original black screen
issue. (If you feel motivated, upstream would probably like to hear
about those other issues you found though - file at bugs.launchpad.net
against Xorg/Intel.)
Anyway, your hardware is Arrandale, and the symptoms and so on gives
enough evidence to point to this being a dupe of bug #745112. The next
stage is to try and narrow down what patch from that upstream kernel
provides the fix. There are some suspicions - see #745112 for the next
steps to take.
** This bug has been marked a duplicate of bug 745112
[arrandale] desktop is messed up (goes black) when laptop is docked with two
external 1920x1200 monitors (x86_64)
* You can subscribe to bug 745112 by following this link:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/745112/+subscribe
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https://bugs.launchpad.net/bugs/749817
Title:
natty regression: screen goes black when external monitor is connected
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