My laptop has Intel Mobile GM965/GL960 integrated graphic controller and the screen size is 1280×800. When I plug another LCD (ThinkVision 22") the upper half of the laptop screen becomes black.
I can see:
– the top panel (on both monitors)
– the bottom size of the laptop screen with all windows and stuff
– the mouse cursor when it goes over the upper black half of the laptop screen and everywhere on the second screen
I cannot see:
– anything else (except for the mouse cursor) in the upper half of the laptop screen
– anything (except for the top panel and mouse cursor) on the second screen
I used Ubuntu 10.10 before with the same hardware and the same two monitors — everything worked fine. But now I can't use the other monitor. Tried to search for a solution — no luck.
Some additional observations:
– If I change the resolution on the other screen to lower settings, then the black part shrinks vertically (it is still there, though)
– After I unplug the second monitor, some windows shift, for example those extended to a half of screen etc.
Any links or ideas are very appreciated. Thanks.
Best Answer
I have resolved the issue, though still think that is a bug.
So, I connected the second monitor, it connected black and half of the laptop screen went black as well. But I left it as it is, just restarted the whole system, and it worked: after the restart both displays shows well. I can disconnect and reconnect the second one, and it works.
P.S. Just tried everything to make it work and found this way...
Edit: In fact, it is enough to just log off/log in with the connected second monitor, and it works.
Edit-2: See also the comments above. Basically, I think the best way is to connect the monitor before logging in, and if it does not work try Alt+F2 and "unity --replace" as an alternative, otherwise log out/in.