I submitted the information requested as Bug #1174432 for the reasons explained above.
I had to delete both /boot/initrd.img from 12.10 and 13.04 to get the installation process to complete satisfactorily, but the system has now booted into 13.04. ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1173020 Title: upgrade from kubuntu 12.10 to 13.04. error with linux-image- extra-3.8.0-19-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1173020/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs