I've just rebooted the system and it dropped into a GRUB prompt. I managed to boot it manually using the instructions here: https://askubuntu.com/questions/38082/how-do-i-manually-boot-from-the- grub-prompt-after-do-release-upgrade
After booting into Xubuntu, I ran: <pre>sudo grub-install</pre> Which ran to completion and appears to have succeeded ("Installation finished. No error reported.") I've just found out that the "shim-signed" package hasn't installed, so I'm waiting for <pre>apt-get install -f</pre> to finish. ** Also affects: shim-signed (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1786090 Title: Installation fails on HP T610 Plus Thin Client internal flash (EFI) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1786090/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs