Thanks for confirming it. You can also try to add thunderbolt to /etc/initramfs-tools/modules to see if that's enough to fix the issue instead of the kernel command line workaround.
I suspect it's not though, and that a hook will be needed to add: * /lib/udev/rules/90-bolt.rules * bolt.service * boltd In any case; I feel the bug is now in initramfs-tools. ** Changed in: linux (Ubuntu) Status: New => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2078573 Title: I can no longer boot from my Thunderbolt disk To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/2078573/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs