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Jags
Asked: 2019-02-25 01:01:31 +0800 CST

How do I switch back to LightDM from GDM3 in Ubuntu Mate 18.10

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So while trying to solve Logitech TouchPad T650 intermittent freezing issue, I installed Solaar ( https://pwr.github.io/Solaar/ ) via Synaptic. During the installation, it asked me to select between GDM3 and LightDM and I accidentally selected GDM3.

So now I'm stuck with GDM3 (to me it feels like being blinded). So far I've tried the following few times and rebooted few times but to no avail. The command runs just find but after reboot, it just goes back to GDM3. 

sudo dpkg-reconfigure lightdm

And on top of this TouchPad has kinda stopped working... while cursor moves, left/right click is not working. It's a desktop PC running Ubuntu Mate 18.10 64bit.

I like to get back to LightDM and remove Solaar, GDM3, etc.. completely. Thanks alot in advance.

gdm display-manager lightdm ubuntu-mate 18.10

1 Answers

  1. Best Answer

    The simpliest solution would be to remove GDM3 completely with

    sudo apt-get purge gdm3
sudo apt-get autoremove

    and then reboot.

    To remove Solaar you can use

    sudo apt-get purge solaar solaar-gnome3

    To remove Ubuntu on Wayland from LightDM use the commands below:

    sudo apt-get purge ubuntu-session xwayland

    also you can remove other GNOME parts with

    sudo apt-get purge gnome-session-bin gnome-settings-daemon
sudo apt-get autoremove

    and reboot.

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