Same issue on a Thinkpad W530 (with Nvidia Optimus + Intel HD4000). Uses Intel driver by default. Second screen is not detected. On Quantal 12.10 x64. Also tested xorg-edgers (with no success and messy graphics as mentioned in this thread) and ubuntu-x-swap/x-updates (which is currently off-line it seems, so I have no idea whether I actually have those updates or not yet).
Same issue on a Thinkpad W530 (with Nvidia Optimus + Intel HD4000). Uses Intel driver by default. Second screen is not detected. On Quantal 12.10 x64. Also tested xorg-edgers (with no success and messy graphics as mentioned in this thread) and ubuntu- x-swap/ x-updates (which is currently off-line it seems, so I have no idea whether I actually have those updates or not yet).