It seems likely that installing to /dev/md126p1 rather than /dev/md126 is the problem here. I've uploaded a fix for that. I'm flying blind here, though, so I would really appreciate testing of the next daily build of utopic (http://cdimage.ubuntu.com/ubuntu-server/daily/current/ should update tomorrow). If that works then I should be able to backport this to trusty.
** Changed in: grub-installer (Ubuntu) Status: New => Fix Committed ** Changed in: grub-installer (Ubuntu) Importance: Undecided => High ** Changed in: grub-installer (Ubuntu) Importance: High => Critical -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1370368 Title: Failed to install Ubuntu 14.04.1 LTS on Dell C6220 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1370368/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs