Comment 94 for bug 1752053

I think there is something wrong with gdm3/wayland/NVIDIA proprietary driver.
If I config gdm3 as default display manager, when rebooted, I have a black screen but I'm able to switch to other tty by press crtl-alt-f2 to f7.
Then I edit /etc/gdm3/custom.conf uncomment line 7th to WaylandEnable=false then rebooted, then I have system hange after reboot :(. It seems that the OS is stuck in gdm3 service.
I tried to change/regenerate/delete xorg.conf but it simply doesn't work. So I think xorg.conf is not the root cause for me.

If I uninstall all nvidia stubs and install nouveau xorg driver, the system is able to boot to graphic shell with gdm3 as a display manager. Unfortunately, the nouveau driver does not support CUDA computing framework and the performance of this driver is very poor when compare to the binary one.

If I config to use lightdm as default DM, it works with NVIDIA binary driver, but this is not what I expected. I expect the system have to work with gdm3, ubuntu-xorg session and NVIDIA proprietary driver. I have an app that need xorg session and CUDA, so I must install NVIDIA binary driver.

PS: If you are able to boot to graphic mode but stuck with login loop, you could try to delete the ~/.Xauthority file then reboot. It worked for me.