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Questions tagged [lightdm]

LightDM (Lightweight Display Manager) is a Display Manager for the X.org X server. It is the default X display manager of Ubuntu. LightDM starts an X session and presents the user with a graphical login screen, so the user does not have to issue commands such as `startx` to start the X server

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Lubuntu 18.04 displays wrong lock screen after waking from sleep

I have Lubuntu 18.04 installed on my laptop and I decided to install slick-greeter from the Ubuntu repositories. However, every after waking my laptop from sleep, this different undesired login screen ...
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Change mouse pointer lightgm login

I have Ubuntu Mate 16.04 and I would like to change my cursor theme in the login screen, I use lightdm. I searched in the /etc/lightdm/lightdm-gtk-greeter.conf file, but there is not a line where I ...
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How to adjust display settings for LightDM greeter on 18.04?

I have three monitors. My login does not position the monitors properly -- the left and right monitors should be swapped. How do I adjust the resolution and monitor position for the LightDM login ...
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NVidia + Ubuntu 18:04: org.freedesktop.systemd1 failed during graphical login

Running Ubuntu LTS 18:04 with nvidia, was working fine. Recently did an apt-get upgrade, and now am no longer able to log in to my desktop. Lightdm starts fine, with both monitors supported, but when ...
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gdm3 won't start by default after upgrade to 18.10 from 18.04

When I configure gdm as my default display manager (dpkg-reconfigure gdm3) and then reboot, I get a black screen with a blinking cursor. From there, I cannot do anything since the ttys does not work (...
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Guest on Ubuntu 18.04

I'm trying to enable the guest session even if it's disabled by default on Ubuntu 18.04. My lightdm --show-congif gives me this: [Seat:*] A allow-guest=true C greeter-wrapper=/usr/lib/lightdm/...
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How to disable monitor connected to laptop until I am logged in with Ubuntu 18.04

I have an issue where my monitor plugged into my laptop displays pixelated, fuzzy, etc when turning my computer on, once I have logged in the monitor display is fine. I have asked everywhere for a fix ...
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gdm3 doesn't working after upgrading from 18.04 to 18.10

I was using gdm3 in Ubuntu 18.04, after upgrading it stopped working (Similar screenshot in gdm3 does not start in ubuntu 18.04) I had no login screen. Using tty I tried (from: Can't start ubuntu-...
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Mate - change background of login page after suspend

I have ubuntu Mate 16.04 on my laptop. I am trying to change the background page of the screen that appears after the laptop has been closed. I changed the bg of the login page (when I power) by: /...
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No GUI after Kubuntu 18.10 upgrade from 18.04 LTS

Summary I updated my (MSI GP72) laptop running Kubuntu 18.04 to 18.10, using sudo do-release-upgrade. The upgrade completed successfully and the system was restarted. Now the GUI doesn't show up. ...
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Login Loop After Upgrade from 18.04 to 18.10

Symptoms Using GNOME desktop on 18.04 for a while now and everything has been working well. Upgraded to 18.10 yesterday and now stuck in a login loop. I can solve the problem temporarily by CTRL + ...
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Ubuntu Unity top panel buttons are stuck at lockscreen

Prerequisites: Updated from 16.04 to 18.04 Using LightDM + Unity (GDM is not an options since VNC has problems with it, Gnome is not an option since it has bug with non-latin layout for ...
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Restart desktop without losing programs?

I can restart my desktop from a console window (Ctrl+Alt+F1) with this command: sudo service lightdm restart This will present a fresh login screen and closes all programs running on the desktop. ...
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Unable to reach login page on Kubuntu

I've recently installed the last version of kubuntu, and, after a few days, the login page has seemingly dissappeared. Instead, when the computer boots I get a black screen in which I can type my ...
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Cannot purge graphical interface from lubuntu 18.04

I installed lubuntu 18.04, so I wanna purge graphical interface, to make it run as a server, with just CLI enabled. But I can't!! I already did: sudo apt remove --purge lubuntu-* sudo apt remove --...
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Failed to start session, WiFi down

All of a sudden I receive a "Failed to start session" on Ubuntu when I login with lightgdm. I googled solutions, and they all tell me to reinstall ubuntu-desktop, however it seems like my WiFi card ...
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Is libpam-kwallet required/necessary in ubuntu 18.04?

I have a fresh install of ubuntu 18.04.1. Running journalctl -b -p err in terminal I get: jim@jim-Z1-7623:~$ journalctl -b -p err -- Logs begin at Wed 2018-10-10 05:02:41 CDT, end at Mon 2018-10-15 ...
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18.04 login fails after screen lock

After doing an update today, I can no longer login after a screen lock. I enter my password, the screen goes black and then returns to the login screen. The only way to login again is to reboot. ...
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LightDM login freezes after successful authentication

I can't seem to log in on Ubuntu 16.04.4 with lightdm, even though authentication is successful. I am able to use the console just fine, but I need to be able to use graphical browsers from time to ...
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unable to start lightdm after upgrade to 18.04

I updated my ubuntu 16.04 machine a few days ago to 18.04. I had a few issues upgrading but I've delt with those. only one issue remain: no GUI. I've spent days troubleshooting and googling the issue ...
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How can I start an application on start up without the user seeing the login screen or the desktop?

I'm using Ubuntu on an up-squared board. The goal is to start a Python application on start up. The application needs to be immediately loaded without the user seeing the log in screen or any Ubuntu ...
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Stuck on Ubuntu splash screen after removing unity-greeter

I am using ubuntu 18.04. I installed unity-desktop for some time and then uninstalled it. I selected lightdm while installing unity. Even after removing unity-desktop there was still unity login ...
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lightdm-kde-greeter on multiseat do to let two simultaneous users login

I have two graphics cards, two monitors and some pairs of input devices. Till weeks ago they were working fine. Also with two simultaneous user logins. Now they behave strange: When user1 logins on ...
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Can't type in guest session terminal windows

A little background, I have updated my machine to ubuntu 18.04 from scratch. Then I installed lightdm in order to bring back the temp guest session from Ubuntu v16. I liked having it for the kids. ...
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Login loop nightmare

Im using Ubuntu 18.04 and have recently ran into the login loop issue. Looking this up online I found a solution by adding pci=nomsi to the the GRUB_CMDLINE_LINUX_DEFAULT command in the /etc/default/...
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Ubuntu 16.04: X-server crashes, preventing auto-login

I've been trying to figure out why the X-server will occasionally crash, preventing lightdm-autologin from running. I've read through several other posts but it didn't seem like any of them where ...
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Ubuntu18.04.1 LTS gets stuck in a login loop

My Ubuntu is stuck in a login loop when trying to enter my desktop. When I login, the screen gets black and soon after that the login screen comes back. I saw this solution: solution But when I ...
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Display flickers in Ubuntu 18.04 after changing from gdm3 to lightdm, and can't open console mode

When using gdm3 on my laptop, I had an error when booting. I changed to lightdm. However, now the display screen flickers when booting, and I can't open console mode using CTRL+ALT+F1/2/3/4... How ...
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Ubuntu 16.04.5 Stuck in login loop after sudo apt update/upgrade

Today my machine gave me a message saying that something was wrong with my computer. I pressed "Report issue". Then I did: sudo apt update and sudo apt upgrade. Following this, I get stuck in a ...
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Disabling doubleclick or setting minimum delay between clicks in doubleclick?

This is common hardware issue in older mouses that they click twice (in rapid succession) even button is pushed once. In 32bit Ubuntu 16.04.5 LTS LightDM desktop i would like to define minimum delay ...
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Large Login Box on Lockscreen

I am running Ubuntu Budgie 18.04, and I'm having some bizarre issues with the password/login box on the lockscreen. This only happens on the screen where I actually lock my laptop. This doesn't ...
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No GUI after Login, GUI works if I drop into TTY terminal then back to lightDM

Just installed Xubuntu 18.04 on my HP Pavilion 15 in a dual boot configuration with windows. I was running Gnomebuntu 16.04 previously, but I am now unable to either install any distro or get the ...
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LightDM login issues

I'm trying to log into my PC running 18.04 with lightDM, and whenever I attempt to sign in, the screen flashes black and returns to my lightDM greeter. If I switch to a different tty and run startx, ...
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Ubuntu 18.04 Display Driver Lots of Locked Files

My system has been frequently locking up since upgrading to 17.10 and it appears to be that xorg it taking the processor to 100%. I purged the NVidia drivers but can’t reinstall as countless files and ...
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display manager issue - Screen/GUI loads layer by layer in ubuntu 16.04 LTS

Recently I got notification from software updater that update is available and instead of using apt-get upgrade I just updated from software updater, after reboot the screen was flickering ...
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System frozen and lightdm does not restart

I'm running Ubuntu 16.04.5 LTS on an Intel Core i7-3770. After running a test program I wrote myself, that was allocating all the memory, just to see how long it would take it to run out of memory, ...
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Lightdm: Logs out immediately after logging in; after running lightdm while logged in

Before the problem started, I had run sudo lightdm, which caused the system to hang. I hard rebooted, and then the problem began. The system is Xubuntu 16.04.5. Currently, I can log in via tty. I ...
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Where to find current technical documentation for Ubuntu? [closed]

My question is: is there a document (or collection of documents), that describes (in sufficient detail to work with it) the design decisions that are specific for Ubuntu and thus distinguish Ubuntu ...
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lubuntu 18.04 on my laptop : enable numlock on for both logon screen and at lightdm session opening

I saw related posts concerning these 2 configurations. But didn't see For information I couldn't get rid of using numlockx tool. For logon screen I needed to add line: greeter-setup-script=/usr/...
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Immediate logoff after login on Ubuntu 16.04

I try to quickly summarize the problem and what happened (details about system are below). I know there exist many similar questions however none of the answers did help in my case. I did not fiddle ...
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1answer
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LightDM not loading any window managers

Short version: LightDM doesn't quite load my i3 session correctly and fails splendidly at loading my vanilla Unity desktop session. I suspect it's a problem with LightDM's configuration or various ...
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1answer
76 views

LightDM: What's the difference between a seat and a session?

My background desire is to configure LightDM to display a greeter on more than one virtual terminal after boot. That aside, I'm reading LightDM docs, the best of which I've found are repeated in ...
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1answer
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Unable to boot Kubuntu

Was running Kubuntu 18.04. Then installed cinnamon-desktop-environment and did sudo dpkg-reconfigure lightdm. On reboot, I'm stuck at a glowing Kubuntu logo! How do I recover?
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Error displays on system start up - Server is already active for display 0

I honestly have no idea why, but when i upgraded mint from version 16 to 17 some moons ago I got the following error: Fatal server error: Server is already active for display 0 If this ...
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Trouble with automatic login

I am trying to setup Automatic Login in Ubuntu 14.04. Under All Setting-> User Accounts, I have enabled Automatic Login under login options. Now when I reboot the system, I am presented with the login ...
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Light Display Manager asks for password to Unlock

I am on Ubuntu 16.04.1. I have installed the lightdm-greeter to change the theme, icons and fonts of my Login screen. However, there is some unexpected behavior taking place after this customization. ...
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Ubuntu 18.04 stuck in login loop with missing .Xauthority file

My computer running Ubuntu 18.04 is stuck in a login loop. I am using lightdm as my display manager, but trying to switch to gdm3 didn't fix the problem (I was still stuck in a login loop). I have ...
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change songs in lock screen ubuntu 18.04

while using gdm3 it is possible to change songs,stop playback while in the lock screen. Now in lightdm its not possible. does anyone know how to do it?
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Unresponsive Application Menus of GTK Applications - Ubuntu 18.04

I have a fresh install of Ubuntu 18.04.1. i installed GScan2PDF v2.1.4 (from Jeffrey Ratcliffe's PPA). Something really weird happens when i try to crop a scanned document: I open GScan2PDF. I click ...
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626 views

Settings schema 'x.dm.slick-greeter' is not installed

I wanted to have a login screen background on Ubuntu 18.04. I followed this: https://askubuntu.com/a/1043034/167612 but it wasn't of much success. Any kind of clue will be helpful. user:~$ sudo ...