I have just made a fresh dual boot installation of Lubuntu 22.04 in a MSI laptop.
I can start and work in both OS, but when I make a shutdown or reboot in the Lubuntu OS the computer just hangs out for ever.
There seems to being happen other problems or other manifestations of the same issue, although I have a nvidia card the another drivers list is empty, and from the first shutdown I have lost the desktop background.
The hangs out for ever showed two behaviors, the first one the log of the MSI with lubuntu logo with the color moving on it and then completely stops. Later on when I shut down or reboot just a black screen.
My laptop has two gpu, one nvidia and one intel.
In mean while I managed to solve the problem by searching the correct nvidia drivers and installing them using apt install. When I did the lubuntu 20 fresh install on another machine I could swear that the nvidia driver appeared in another driver after installation but with this one it only appears after I had installed.
If it was already like that before, I apologize for taken your time, if it is particular to 22.04, some MSI laptops or both then at least there is here a possible work around for others that face the same problem.