Seems to be fixed by apt-get -f install
The following extra packages will be installed: libc-dev-bin libc6 libc6:i386 libc6-dev libnih-dbus1 libnih1 Suggested packages: glibc-doc glibc-doc:i386 locales:i386 The following packages will be upgraded: libc-dev-bin libc6 libc6:i386 libc6-dev libnih-dbus1 libnih1 6 upgraded, 0 newly installed, 0 to remove and 1046 not upgraded. and then apt-get dist-upgrade did lots of work - and failed with more errors. Looks like my mdadm array stayed mounted on /mnt (fuse - not my mount) after earlier failures, causing issues for base-files: Unpacking replacement base-files ... dpkg: error processing /var/cache/apt/archives/base-files_6.12ubuntu2_amd64.deb (--unpack): unable to stat `./mnt' (which I was about to install): Input/output error Manually unmounted /mnt and then was able to complete apt-get dist- upgrade David -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1196762 Title: do-release-upgrade fails libc quantal -> raring To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1196762/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs