Looks like the problems removing older linux versions come from grub-pc errors; extract from /var/log/dist-upgrade/apt-term.log:
Removing linux-image-3.2.0-29-generic ... Examining /etc/kernel/postrm.d . run-parts: executing /etc/kernel/postrm.d/initramfs-tools 3.2.0-29-generic /boot/vmlinuz-3.2.0-29-generic update-initramfs: Deleting /boot/initrd.img-3.2.0-29-generic run-parts: executing /etc/kernel/postrm.d/zz-update-grub 3.2.0-29-generic /boot/vmlinuz-3.2.0-29-generic Generating grub.cfg ... run-parts: /etc/kernel/postrm.d/zz-update-grub exited with return code 1 Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/info/linux-image-3.2.0-29-generic.postrm line 328. dpkg: error processing linux-image-3.2.0-29-generic (--remove): subprocess installed post-removal script returned error exit status 1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1078653 Title: upgrade Ubuntu 12.04 -> 12.10 has several problems: grub-pc, apport, older linux versions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1078653/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs