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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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54 views

Ubuntu 16.04: Failed to start Light Display Manager

I am running Ubuntu 16.04 on VirtualBox 6.0. The hosting system is Windows 10. Before everything started to fail, I've had installed VirtualBox 5.2.2. After that, there appeared a dialog inside of ...
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18 views

Missing taskbar after lightdm restart, fixed by another restart of lightdm

Recently I have been getting the Lagging box around mouse cursor on Ubuntu and the only solution to this is restarting lightdm. However when I restart lightdm I am missing my taskbar. Another restart ...
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1answer
67 views

Ubuntu 18.04 Won't Advance Past Login Screen

I am not sure what caused my current issue but I had recently installed a displaylink driver for a secondary Asus MB186B monitor connected via USB 3. After rebooting this worked fine. I was messing ...
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1answer
18 views

“Failed to start session” on login

I have a machine (let's name it my-machine), which runs Ubuntu 16.04. my-machine is connected to LDAP, and I use an LDAP account to login to it. With my LDAP account, I use exclusively this machine. ...
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47 views

18.04: Even with WaylandEnable=false gdm3 and lightdm only load sometimes

I am happy to use either gdm3 or lightdm, but neither are stable on my Ubuntu 18.04 system, they will work for either one or several boots after I take corrective action, but inevitably this results ...
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1answer
29 views

Problem with lock screen after suspend

I'm running Ubuntu 18.10, and I've changed my login screen to lightdm (since I don't like the gdm3 screen), but whenever my laptop suspends, it'll still show the gnome lock screen to log back in. ...
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30 views

Xorg high CPU usage when session is unlocked + USB port

I'm experiencing Xorg high CPU usage(90-100%) problem when I unlock session. It keeps going for 5 minutes. Process that causes problem: /usr/lib/xorg/Xorg -core :0 -seat seat0 -auth /var/run/lightdm/...
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1answer
138 views

How to configure login screen in Xubuntu 18.04 - Slick Greeter

I have installed Xubuntu 18.04. The login screen shows lightdm gtk greeter like login. I didn't like this type of view so I installed slick greeter through terminal and removed gtk greeter through ...
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1answer
92 views

How to use custom ~/.xsession with gdm3 in Ubuntu 18.04 Bionic?

I upgraded from 16.04 to 18.04 and can no longer choose my custom ~/.xsession in the session menu in gdm3 or lightdm. If I use xdm as the login manager my ~/.xsession runs, but then I have other ...
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18 views

What does `lightdm --session-child 12 19` mean?

What does lightdm --session-child 12 19 mean in the following output? Why does lightdm fork a process to execute the above command? I don't find --session-child in lightdm manpage. Thanks. $ pstree ...
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1answer
28 views

My changes to com.canonical.unity-greeter file won't take effect

I've installed lightdm and messed around with my login screen settings, but now that I want to use the standard 16.04 login screen(minus the dot-grid) the changes won't take effect. unity-greeter ...
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1answer
91 views

How can i change logo DE on LightDM

How can I change this with my own logo i'm using ubuntu 18.04 I have searched but till now I haven't got the solution
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63 views

Unable to get GUI working over HDMI

I have been running a Plex server on Lubuntu in my closet for over a year now and have been remoting in via VNC without issues. I decided to connect it to my new TV to add web browsing and all I get ...
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83 views

Lightdm is not changing background on Ubuntu 18.04

I installed Ubuntu 18.04.1 and right away installed Unity and configured lightdm instead of gdm and then removed gnome-shell while in unity enviornment. Since then no problem except lightdm won't ...
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76 views

Lock screen not working in xubuntu 18.04

Just installed xubuntu 18.04. Lock screen doesn't work: when I click in the locker image on the ower right corner of the menu, nothing happens. Trying to debug it I found out that apparently there is ...
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16 views

Use Xscreensaver at the login screen

I'm using Xubuntu 18.04 and I'd like to show a carousel of images as screeensaver. I installed Xscreensaver and it works fine when a user is logged in but I can't make it work at the login screen. ...
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32 views

Is there a way to “import” a previous ~/.config folder back as my ~/.config folder?

So today my laptop running Ubuntu 18.04 got stuck in a log-in loop. I finally found a solution by renaming my ~/.config folder to ~/.config.old. I was able to log-in but everything was now in its ...
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1answer
407 views

failed to start Light Display Manager

I am very new to Ubuntu. I am getting failed to start Light Display Manager error when I start Ubuntu. I am not getting login page. It might be possible that I have deleted Lightdm package. Can I ...
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20 views

LightDM background blocking desktop

I am having an issue when logging in to Xubuntu 18.04. Everything boots fine, but when I actually log in, the background from LightDM stays on the screen and there is nothing else, no panels, right-...
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0answers
54 views

lightdm multiscreen ubuntu 18.04 problem

I have two screens: HDMI-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 708mm x 398mm DVI-0 disconnected (normal left inverted right x axis y axis) VGA-0 connected primary ...
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1answer
35 views

Ubuntu 18 unity - keyboard (not mouse) freeze, lightdm restart borks system

I'm having the following problem within Unity in Ubuntu 18 after a while the keyboard becomes non responsive (sometimes, prior to this it behaves like a mouse button is stuck down and mouse movement ...
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136 views

Stuck in login loop Ubuntu 16.04

I need some advice for working towards a resolution to my current login loop issue in Ubuntu Desktop 16.04. When I try to sign in locally, after I input the correct password, the gui prompts for the ...
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0answers
25 views

Stuck during login Ubuntu 18.04

I installed nvidia-driver. On restart, I stuck on the login screen. It sticks as soon as I enter credentials. By looking previous answers, I tried to reinstall lighten using recovery mode. But ...
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0answers
56 views

LightDM and Multiseat: how to make greeter remember the username of the last logged-out user?

I've configured a two-seat setup with Xubuntu 18.04. The only problem is that when user logs out on either seat, the greeter then picks (seemingly) randomly the username for the next login. Since the ...
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1answer
96 views

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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48 views

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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1answer
130 views

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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0answers
70 views

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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1answer
750 views

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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1answer
297 views

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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0answers
26 views

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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1answer
174 views

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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1answer
47 views

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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0answers
512 views

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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2answers
1k views

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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0answers
48 views

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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0answers
61 views

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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1answer
36 views

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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0answers
28 views

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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0answers
27 views

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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0answers
144 views

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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0answers
89 views

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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0answers
32 views

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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0answers
413 views

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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0answers
23 views

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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1answer
93 views

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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1answer
97 views

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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0answers
121 views

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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0answers
61 views

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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0answers
111 views

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 ...