I just re-installed and updated. The update causing the screen failure is the new linux kernel, which was added to the repository on 2-Aug-2012. Before I rebooted into the new kernel, everything worked.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1032275 Title: Multitouch screens on Lenovo X230 tablets do not work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1032275/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp