I rebooted without issue and then re-ran sudo dpkg --configure -a and grub-pc updated itself normally.
Not sure how the system got into a state where grub-pc was hanging. I did have a lot of defunct processes hanging around for some reason. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/691569 Title: grub-setup hangs on upgrade (natty) -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs