I have performed the same verification of ubuntu-release-upgrader 1:16.04.29 on xenial. I have enabled xenial-proposed, upgraded (pulling a new kernel), ran `do-release-upgrade` and got the message that a reboot is required first. Situation similar to bionic. Good to go.
I have performed the same verification of ubuntu- release- upgrader 1:16.04.29 on xenial. I have enabled xenial-proposed, upgraded (pulling a new kernel), ran `do-release- upgrade` and got the message that a reboot is required first. Situation similar to bionic. Good to go.