Looks like the bug is related to FB modesetting done by linux- image-3.5.0-18-generic kernel. I rebooted into 3.2.0-30-generic and the resolution became correct.
Reassign the bug the the linux-image kernel package please. ** Package changed: xserver-xorg-video-intel (Ubuntu) => linux (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1073876 Title: 1680x1050 resolution has wrong clock value? Status in “linux” package in Ubuntu: Incomplete Bug description: Under ubuntu 12.04, the 1680x1050 mode worked perfectly on my Asus VW222s LCD screen. VGA card: Intel Corporation 82G33/G31 Express Integrated Graphics Controller (rev 10) After upgrade to 12.10, the resolution appears chopped on the right, I can't see about 300 pixels. While tweaking monitor's OSD settings I found setting "Clock" that was at 50. When reduced to 0, I gained about 150 more pixels, but the rest of the pixels are still not visible. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1073876/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp