Logon Screen Resolution

Support & Help Requests
1

I have manually installed Ubuntu MATE onto a Ubuntu minimal system. Because my (Armbian Ubuntu) distro doesn't have a MATE version (out of the box).

The system boots but when it comes time to displaying the logon screen all I see is black. If I blindly type the only password for the only account the desktop appears without problem a few seconds later.

So during boot the console is working, and after logon the desktop is working but I can't see the logon screen.

I suspect this is a resolution incompatibility (I have a QHD monitor) and my guess is the system is defaulting to 4K. Where in MATE is the default screen resolution for the logon screen maintained?

MATE is built on Xorg and is using lightdm so it may be an Xorg setting!!!

I'm using Armbian 23.5 which is Ubuntu 22.04.02.

2

A DM or display manager handles the login process, and its only there that you select what session you want to use (which includes if you opt to use Xorg or Wayland etc), thus I doubt Xorg settings would help.

Light DM settings can be found on various pages, eg. LightDM - Ubuntu Wiki with some settings being able to be configured via a settings tool, but sorry I've not used lightdm in years thus wouldn't want to advise further (testing it works & configuring it for specific cases differ somewhat).

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3

It turns out I was fighting a kernel incompatibility issue and there was nothing I could change to fix the issue. Installed the right kernel and everything began to work as expected.

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