In this case, I suggest you try the lts kernel.
Thank you for the suggestion, but I can’t use linux-lts, my laptop is a Dell Precision m5510 (xps 9550), I need last kernel for proper hardware recognition.
I’ll wait for next update to see if it’s solved, in mean time I’ll use gdm and gnome on wayland.
I have the same problem with lightdm.
After last update I’m not able to login in gnome.
The greeter shown correctly but after I typed the password the screen goes black with an X coursor and nothing else.
The problem is lightDM because if I switch to gdm I can login correctly.