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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Windows lose focus and appear behind desktop icons

On one of my machines I have a problem where the active windows lose focus and appear behind the desktop icons. Cf. screenshots. After playing with Alt-tab it's possible to get out of it, but it's not ...
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Blue tinted screen after login

I freshly installed Ubuntu Server 22.04.1 and added ubuntu-desktop with lightdm to it. Everything is running fine, besides the fact that the screen is getting tinted blue after I log in. See attached ...
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VNC Crashes right after login

While I'm connecting to a pc via VNC it works smoothly but when I'm trying to log in a specific user which I added the user via the Join to domain process the VNC crashes right after, the login worked ...
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Configuring LightDM Lockscreen

Through some online forums I determined that, with lightdm, I could bypass the authentication greeter after a screen lock by simply switching the VT/TTY. Then I came across information from here: ...
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How to make LightDM login screen have the same background as the desktop background in Ubuntu MATE?

I am using Ubuntu MATE 22.04. Back when Ubuntu used Unity, the background of the LightDM login screen automatically changed when a different desktop background was selected. Can something like that ...
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Configuring vnc server with login screen

At this point I've researched about every forum post there is on the topic and I can't seem to at least understand why I am unable to accomplish this task. Many/most posts are several years old so I ...
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22.04 black login screen on Early 2008 iMac

for some days now I only get a black screen after booting. Detailed error description: During the boot, the display resolution seems to be messed up and everything is displayed in a distorted manner. ...
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Cannot log into primary user Ubuntu 22.10

I recently installed 22.10 on my Acer Predator laptop and have had no problems until two days ago. I was playing the new Dwarf Fortress through Steam, the screen went black except for the top bar and ...
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Changing resolution of the greeter

So I've installed XUbuntu on a machine that is connected to a 4K TV, but the machine itself cannot handle 4K. It tries, which results in a glitchy mess. Luckily, I can ssh into the machine and force ...
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Allow multiple users to be logged-in on the same account using XDMCP and display-managers in Ubuntu 22.04

I have read somewhere that Lightdm doesn’t support multiple users to be logged in at the same time, and that can I confirm, because when I’m trying to login on an already logged on machine, it fails. ...
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Problem with display manager in several kernels

I'm having a problem starting the GUI on several kernels - now for a while and it is getting more severe now: The general problem is, that the boot of the system stops at the point when starting ...
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unable to boot into my machine because of lightdm, and tty doesn't help

Probably not the best title but I'm kinda going crazy here. I'm pretty sure I messed up something with my lightdm configuration (i tried to "restore" it since an apt package install told me ...
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apport-autoreport.service loaded failed failed Process error reports when automatic reporting is enabled

OS Ubuntu 22.04.1 LTS Kernel 5.15.0-52-generic DE: GNOME 42.5 CPU: 11th Gen Intel i5-11300H (8) @ GPU: NVIDIA GeForce GTX 1650 Mobile Memory: 3173MiB / 15795MiB I am not ...
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Screen flicker on 'Lenovo ThinkPad P16 Gen 1'

Whenever I close the display and open it back up, the screen starts to flicker. It doesn't go away, and the only way I know to get back to normal screen is to restart the machine. I have tried lightdm,...
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Xubuntu Studio - login prompt opens on wrong screen on dual-monitor setup

This PC is Ubuntu Studio with Xfce, used as a gaming emulator and home cinema. Primary display: Dell 2009W (1680x1050) - monitor Secondary display: Panasonic PTAT6000 (1920x1080) - projector GPU: ...
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I have locked myself out of my computer

I am now running Ubuntu 22.04 LTS “Jammy Jellyfish” As you could expect from my other post on custom keyboard issues, I have messed up again with my /usr/share/X11/xkb/rules/evdev/files The unexpected ...
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Can't log in from LightDM

After updating with dist-upgrade command Can't log in from LightDM This error is displayed in the log file (lightdm:709): CRITICAL **: session_get_login1_session_id: assertion 'session != NULL' failed ...
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Releasing CAPS LOCK with the SHIFT key

I want my Shift key to do caps and special characters without being affected by Caps Lock. I want to release Caps Lock with Shift. I don't want Shift to toggle. How can I do this?
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unknown guest account with password created

i am using ubuntu 20.04 i want guest session for students so i enabled it by following How to enable Guest session on Ubuntu 20.04 Focal Fossa Linux 30 April 2020 by Lubos Rendek terminal commands 1....
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Ubuntu 20.04 x11vnc black screen with lightdm

I am running a fresh installation of 20.04. I am new to this, so I followed this video for installing x11vnc. The problem I'm facing is that the screen shows black on the remote pc when there is no ...
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After attempting to upgrade from 18.04 to 20.04 login LightDM is black (blinking cursor), can't access v-terminal or recovery mode

I attempted to upgrade from 18.04 to 20.04 to no avail. After some issues I restarted my computer and now the login screen is just black with occasionally a blinking grey cursor in the top left. I've ...
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22.04 upgrade from 20.04 - stuck after login; lightdm problem?

Yesterday I upgraded my Ubuntu 20.04 Pixelbook (full Ubuntu, no Chrome nonsense) to 22.04. However, the system now gets stuck immediately after login. After I successfully log in, the login prompt ...
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Desktop takes time to show up after entering password on login screen

After entering my password at the login screen, a blank screen appears with a mouse cursor which we can move and after ~2 minutes the desktop shows up. This happens not only after booting but also if ...
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Text/terminal login appears for 12 seconds second before lightdm loads, and other lightdm problems

I'm having some problems with LightDM. How I got here: I did a fresh install of UbuntuStudio, 22.04. I found the desktop environment frustrating, so I installed the Mate desktop environment instead. I ...
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Unble to access the internet after restarting device

I'm using Ubuntu 20.04. Due to some circumstances which I don't remember I had to switch from gdm3 to lightdm. From then on, after restarting my device, even though it get's connected to the Wi-Fi, I ...
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Firefox can't create temp dir for guest user in lightdm [closed]

I've setup latest Ubuntu 22.04 (jammy) to use lightdm, and enabled the guest account via a lightdm config. This seems to work fine, and can login with an ephemeral guest account that gets removed on ...
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Boot Problems in Ubuntu 22.04

I have several problems when booting into mate under Ubuntu 22.04 The boot starts both the console and tty1. Makes logging on in text mode nearly impossible The graphical boot starts lightdm twice ...
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Why do lightdm and Xorg cause so much CPU load on my Xubuntu 20.04?

What is it that loads the CPU so unreasonably? (Lenovo W530 with Xubuntu 20.04.4 LTS, currently using kernel 5.4.0-110-generic x86_64). After an upgrade, the CPU on my Lenovo W530 laptop spins at an ...
2 votes
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Ubuntu 20.04 Can't get passed login after update

4 days ago, I decided to install the update that "Software and Updates" has been suggesting for a while. After the progress dialog was gone, I closed the laptop lid, expecting it to sleep(...
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cant re enable lightdm

I ran sudo systemctl disable lightdm.service and now i cant find a way to enable it. Using xubuntu22 LTS What I already tried with output: sudo systemctl enable lightdm.service Synchronizing state of ...
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KUBUNTU root login through GUI not possible

I have Kubuntu 22.04 installed with everything as default. It uses lightdm for for windo management. I can login as with root user in a terminal session; for example if I press alt F2 to get a ...
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Light Display Manager 1.30.0 won’t start seat0 on Ubuntu 20.04

I’ve been messing around with a fresh Ubuntu 20.04 install on an HP 17 laptop. I was feeling curious and adventurous and installed enlightenment, deepin, and arctica desktops, with the intention of ...
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When installing various desktop environments, how can one prevent user interactions requesting a selection of display managers like LightDM and GDM3? [duplicate]

I have a Bash setup script for Ubuntu. It is intended to be designed to minimise the user interactions needed to get to a fully set up system. In the script, there might be commands like the following:...
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How do I set user background for lightDM login screen?

I am quite lost on how to set user-specific background. There does not seem to be many resources on this matter. Setting background from gnome-control-center does not work. org.gnome.settings-daemon....
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cannot enable display-manager

for some reason, the systemctl enable display-manager command fails: Failed to enable unit: Refusing to operate on alias name or linked unit file: display-manager.service my DE is xfce + lightdm ...
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Don't boot shortly after upgrading to 20.04 - but can launch startx manually on recovery mode

Using Kubuntu with Gnome installed (I think this is Ubuntu with extra steps but it's work computer, I did not choose flavor) Computer is Lenovo T440P with 16 Go RAM (Core i5, integrated GPU) Upgraded ...
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Ubuntu 20.04 - LightDM Auto Login Not Consistently Working

I've got a fresh install of Ubuntu 20.04, but can't get auto login to work consistently. The only workaround i've found is to add a 2 second wait time, but i want to get to the root of the issue. ...
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Unable to get x11vnc viewer working on a Ubuntu 20.04LTS machine

I am struggling to get x11vnc working on a ubuntu 20.04 server. It works ok, if I am logged into the Dell idrac and have a viewer session open. I can connect fie from the Sophos firewall and see the ...
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How do I rice my Ubuntu Desktop?

I saw a few of the posts on r/unixporn with beautiful layouts and styled desktops with beautiful icons. While the only thing I have done is position my dock on the right lol. I recently had an issue ...
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LightDM-GTK-Greeter external indicator

I've seen the "External library/service" indicator option in lightdm-gtk-greeter-settings, (which seems to put the indicator in lightdm-gtk-greeter.conf without a ~ prepended) and I am ...
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Fluxbox + lightdm on ubuntu 20.04 running on BBG

I have configured ubuntu 20.o4 LTS for ARM Cortex (BBG) processor, connected LCD. I am trying to configure fluxbox and the lightdm window manager. Fluxbox and lightdm is not showing login window. When ...
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Distortion and tearing effect on internal 4k screen (HP elitebook laptop) with gdm/lightdm

I have a weird distortion and flickering effect happening when embedded videos (inside text content) are running in web browsers or when I scroll in any sort of scrollable content (e.g., webpage, ...
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mate desktop does not start on my ubuntu 21.10 system (lightdm doesn't start)

I installed ubuntu 21.10 and tried to replace the regular desktop by mate (I add more details below). The current situation is, that if I boot into my ubuntu system, it displays, that it has some ...
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lightdm trying to use non-existent external display

I'm having problems logging in to my X session and/or resuming from a suspend. Starting about 6 months ago, I started having issues with my desktop manager, lightdm (though I've tried others like gdm3 ...
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Lightm gets stuck immediately after login, but slim and xdm seems to work in Xubuntu 20.04

Some background first. I was trying to reduce the power consumption in xubuntu in my laptop , which led me on a trail towards finding which GPU was being used for rendering the display. ( My laptop ...
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Black screen between plymouth and lightdm

I am using Ubuntu 18.04 on a custom ARM-based board. When it boots, I see the plymouth boot screen for two seconds, and then it jumps to a console screen with a blinking text cursor in the upper right ...
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Lightdm(with slick-greeter) only starts AFTER tty login

I recently installed slick-greeter, and have wrestled with various configuration issues, and spent quite some time searching various threads across various distros for the issue I'm seeing. That is, ...
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How do I stop the GUI (in Kubuntu 21.10)

I need to stop the GUI and access a TTY for the NVIDIA drivers. I found this question. However, when I tried sudo service lightdm stop (or the same with gdm), it said this: $ sudo service lightdm stop ...
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Display manager SDDM doesn't make use of 3rd monitor

I have computer with 2 videocards and 3 monitors attached - 2 to one card and 1 to another one. I run Ubuntu Server with X and I want to use most lightweight display manager as possible. I’m trying to ...
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Ubuntu gets stuck in a login loop unless a different user logs in

I'm trying not to make a duplicate of a previous question, but I do have the same problem. I'm using gdm3 and have purged, and reinstalled multiple times. A different user 'test' and sudo startx work. ...

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