Having reformatted the usb drive as ext3, I now find that the problem has disappeared. It looks like this bug only happens with the drive formatted as fat32.
-- hangs on starting operations https://bugs.launchpad.net/bugs/327410 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