A user on ubuntuforums has reported to have got through this problem by booting from CD and entering chroot.
Problematic packages have to be installed by: dpkg -i /var/cache/apt/archives/<package>.deb then running: apt-get -f install apt-get -f upgrade sometimes: dpkg --configure <package> A circular depency was solved by: dpkg --ignore-depends <package1> --install/configure <package2> About 30 packages had to be installed manually, running apt-get after each is moving forward a bit, errors are the solved by the commands above. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/985015 Title: Upgrade to 12.04 beta 2 succeed, but no keyboard nor mouse afterwards To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/985015/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs