So, I had my external monitor working after using the usual fix for mirroring (MirrorDisplays.app to toggle it off)...
Then I kept messing with settings (SwitchResX, Display Maestro). I think the last thing I did was try to use it in Clamshell mode by connecting and external keyboard, and closing the lid. That froze the computer.
Now,
whenever I connect the external monitor, the lcd flashes, goes to a blank desktop (nothing on screen), and the external goes to sleep. Disconnecting/reconnecting the external produces no change, and I'm forced to hard reset.
I've tried removing display prefs, as in
here. Tried reinstalling 10v extensions via Netbookinstaller. Nothing's working.
Thanks for the help.
