On a very normal 21.10 system, and received the same message. What is a little shocking is that the terminal portion of the window opens, *asking* you to reboot, and just sits there for 3, 4, 5 minutes at that message. I fear many users today and in the weeks to come who do this procedure will not wait and will do what the system asks, breaking their systems.
I just did a:
sudo update-manager -d
On a very normal 21.10 system, and received the same message. What is a little shocking is that the terminal portion of the window opens, *asking* you to reboot, and just sits there for 3, 4, 5 minutes at that message. I fear many users today and in the weeks to come who do this procedure will not wait and will do what the system asks, breaking their systems.