[Bug 1849886] Re: lightdm does not work on eoan on raspberry pi 4

[Razor_alpha]

The very same happened to me on 19.10 aarch64 version on my Pi 4 4GB,
changing to gdm3 did result in a usable system for me too.

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https://bugs.launchpad.net/bugs/1849886

Title:
  lightdm does not work on eoan on raspberry pi 4

Status in software-properties package in Ubuntu:
  Confirmed

Bug description:
  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.

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