I've just updated to Ubuntu 12.10 last night. When I was at the office, I connected my laptop with a projector. Although it can detect the projector, it incorrectly set the projector portrait. Also, if I click the Rotation dropdown, it had no Normal option. It only offered Anticlockwise and Clockwise options. Ofcourse the projector would display my desktop 90 degrees clockwise/anticlockwise.
I've just tested my laptop again with an LCD monitor, and it happened again. Below is my screenshot of my display settings dialog.
My display adapter is Intel GMA 950.
How to fix this problem?