You have been subscribed to a public bug:
if you follow the directions on https://wiki.ubuntu.com/ARM/RaspberryPi
sudo apt-get install xubuntu-desktop
about 20% thru the installation it will ask which window manager you want
(using dpkg-reconfigure).
if you select lightdm, you will only get a blank greeter screen after you
reboot.
using sudo dpkg-reconfigure gdm3
resets this to gdm3 and after a reboot, everything is fine.
this was done on a clean armhf eoan install on a 4gb raspberry pi 4B.
I have done the install several times. This bug is repeatable.
** Affects: lightdm (Ubuntu)
Importance: Undecided
Status: Incomplete
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lightdm does not work on eoan on raspberry pi 4
https://bugs.launchpad.net/bugs/1849886
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to lightdm in Ubuntu.
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