I attempted the workaround @hansaplast suggested but it didn't work. I'm left with this in syslog:
in-target: The following packages have unmet dependencies: in-target: xserver-xorg-video-ati : Depends: xserver-xorg-video-radeon but it is not installable -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/976509 Title: Can't install Ubuntu 12.04 beta 2 Alternative To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/debian-installer/+bug/976509/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
