Repair Ubuntu Grapical Startup

[philly1ms]

So I was messing around with trying to get VNC working and when I installed lightdm all hell broke loose and now Ubuntu won't start properly when rebooted. I removed lightdm but my gnome session won't start unless I boot into recovery and startx. Not sure if that's even running gnome because my second monitor no longer displays. Any help with repairing my log in session? Thank you

I'm running Ubuntu 20.04.3 64-bit
Gnome Version is 3.36.8

[tea for one]

Have you tried this via a terminal:-

sudo dpkg-reconfigure gdm3

[philly1ms]

When I do that I get:

gdm.service is not active, cannot reload.
invoke-rc.d: initscript gdm3, action "reload" failed.

[tea for one]

Have you rebooted?

[grahammechanical]

Try rebooting into recovery mode>Root - Root shell prompt and then running the command to reconfigure GDM3.

When you installed LightDM you also configured it and that process disabled GDM3. Then you removed LightDM and now you do not have a working display server to present the login screen. The correct procedure would have been to configure GDM3 and then remove LightDM after first making sure that GDM3 was working. I think that configuring GDM3 before the desktop loads might work. You may even need to re-install GDM3.

Regards

P.S. I do not think that LightDM is crafted to load Gnome 3 shell. I would load Unity 7 if that user interface was installed.

[philly1ms]

I'm up and running. The reboot got me back into Gnome desktop. Thanks for the help and information. I really want to give up Windows completely.

[tea for one]

I'm up and running. The reboot got me back into Gnome desktop.
That's good news.
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