Screen detection in clamshell mode problems
I have a weird issue with clamshell mode in Lion 10.7.2
Hardware: MacBook Air 13" i5 1.7, Apple Cinema Display 30" connected with Apple Mini DisplayPort to Dual-Link DVI adapter.
Normally I use the computer in clamshell mode, with the laptop lid closed. It only sees the main 30" display, which is the desired behaviour—all good so far.
When I put the computer to sleep, then wake it up, it suddenly sees two displays—despite the lid being closed all along.
The laptop screen is on (even though it is closed). I open the lid, then close it—the screen backlight gets switched off but the laptop LCD is still active in OS settings, I can move mouse cursor and windows to it and so on.
There is no way to get rid of laptop display unless I restart the computer—then it only sees the active 30" screen again.
In the end, I have to restart the computer every time I wake it up.
Did anyone experience something like that? Any ideas what is going on? Thanks.
MacBook Air, Mac OS X (10.7.2), ACD 30"