The problem went away after rebooting the system. So spudly's suspicion of processes hanging around looks like it might be it.
Fix the upgrade script maybe? -- Firefox total blank screen after apt-get upgrade https://bugs.launchpad.net/bugs/299227 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
