Hello folks,

This thread will be a little awkward (for me at least!).
Next monday, I'll have my work laptop reinstalled under stock Ubuntu 21.04, as per my company's policies.

The thing is, I have not used a pre-configured distro in years !
I don't want to use the default Gnome shell, or the default software provided with the distro. I don't mind keeping everything installed though, in case a coworker needs to login on my computer (it'll be connected to the active directory).

So my question will be simple (though the answer might be complex…) :

How do I cleanly change my login session under Ubuntu ?

I basically have my ~/.xsession setup for use with the "xdm" login manager (it is equivalent to an .xinitrc). How do I translate/change it so I can use it under Ubuntu ? I've found that it uses GDM3 and that I'd possibly have to create a .desktop entry to /usr/share/xsessions to launch my own "session script" or whatever. Is that correct ?

Also, Ubuntu 21.04 ships with Wayland by default. Apparently X is still installed, but I'd like to confirm that if anyone has the info.

Help me as the Ubuntu login stack is totally unknown to me, and I don't want to loose too much time setting up my machine next week.

Thanks everyone !