It seems that this issue went away after I disconnected a particular USB hub. It seems a strange thing to cause an issue like this, but that appears to have been the cause.
** Changed in: linux (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/771418 Title: Ubuntu kernels above version 2.6.35-25 fail to load > 50% of the time -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs