Switch to lightdm
If the login screen is at tty1 (ctrl alt f1) then you're using gdm.
I think there are some switching issues with gdm.
Lightdm was what Ubuntu used prior to the new desktop paradigm.
And unity works far better with lightdm, anyway.
lightdm's session screen is at tty7 or (ctrl alt f7, fwiw)
Since this is an upgrade it (lightdm) should still be installed, so it would just be a matter of re-configuring which to set as the system default.
Simple enough with
Code:
sudo dpkg-reconfigure lightdm
then select lightdm from the list and select Ok.
It should apply on a restart/reboot.
If it's bugs out too, try removing and reinstalling lightdm:
https://askubuntu.com/questions/1044...y-ubuntu-18-04
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