I installed ubuntu-12.10-desktop-amd64.iso into a usb disk on a non-haswell machine, then update kernel to a version which support i915-hsw, then use this usb disk to boot on a haswell machine, the ubuntu-12.10 can be successfully booted up.
Then i plugged a VGA to the machine test video switching, this problem can be reproduced. After upgrade xserver-xorg-video-intel to 2:2.20.9-0ubuntu2.3, the problem disappeared.
So the xserver-xorg-video-intel for quantal was verified to be functional.
I installed ubuntu- 12.10-desktop- amd64.iso into a usb disk on a non-haswell machine, then update kernel to a version which support i915-hsw, then use this usb disk to boot on a haswell machine, the ubuntu-12.10 can be successfully booted up.
Then i plugged a VGA to the machine test video switching, this problem can be reproduced. After upgrade xserver- xorg-video- intel to 2:2.20. 9-0ubuntu2. 3, the problem disappeared.
So the xserver- xorg-video- intel for quantal was verified to be functional.