It turns out my problem is that I have a Radeon 3000 series video card. It's only 2 years old but apparently has been deemed "legacy" and is no longer supported by official packages. The instructions here solved my problem:
https://launchpad.net/~makson96/+archive/fglrx This seems like something I should've been warned about during the install, or that should at least be mentioned in the Release Notes. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1068571 Title: Upgrade from 12.04 -> 12.10. No window manager. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1068571/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
