Confirmed that this issue is definitely caused by cloud-init replacing grub debconf with an incorrect value upon first boot.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2060695 Title: 24.04 grub-pc cannot upgrade on mirrored software RAID root disk To manage notifications about this bug go to: https://bugs.launchpad.net/subiquity/+bug/2060695/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs