Questions tagged [lightdm]

LightDM is a lightweight X11 display manager. It can use different greeters in the style of different desktop environments.

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XDMCP locally using Unix sockets

Is there any way to start a XDMCP session, say with Xephyr in LightDM, locally through Unix Sockets instead of IP? For performance I was wondering if, somehow, I can avoid any network stack working ...
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Change default xorg.conf video driver

Debian 11 here with LXDE (Xorg + lightdm) How could I change the driver used by X? My X is using the default options, I have no /etc/X11/xorg.conf file, so I generate one with the command sudo X -...
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Recent LDAP user list missing in greeter using lightdm

I am switching our desktop manager from xfce to mate on centos 7.4. This means that we are switching from gdm to lightdm. For some reasons, it is impossible for our recent user authenticated via a ...
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xrandr - Issues using --left-of to set up a second display

I have two monitors, DP-3 with 2560x1440 resolution, and HDMI-1 with 1920x1200 resolution. I want HDMI-1 to be displayed to the left of DP-3. When I run xrandr --output HDMI-1 --auto --right-of DP-3 ...
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$DISPLAY of lightdm?

lightdm is running an X server. How to find out which $DISPLAY setting it is listening to? Background: I'm debugging what appears like DPMS issues between a monitor and a GPU (proprietary nvidia ...
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Lightdm flickers and doesn't display anything correctly, but works fine after opening and closing the lid or connecting an external monitor

I have installed manjaro on a new machine with a hidpi display. It displays a scrambled and flickering version of lightdm at boot (you can sort of recognize a few pixels of the background image). But ...
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Installing gdm3 causes settings to crash, doesn't work on pre-existing accounts

so on my fresh Xubuntu install (dual booting with macOS Catalina), I wanted to install gdm3. I used the following commands: sudo apt-get install gdm3 sudo systemctl enable gdm3 sudo systemctl disable ...
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Blank screen at startup, xset is unable to open display ""

Seemingly from out of nowhere, I get a blank screen during startup on Arch Linux. Going into the TTY shows me xset: unable to open display "" Unable to connect to X server I use X11, ...
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How to setup lightdm to automatically log in specific user only once

When you add following config into one of the lightdm config file, you can get user to be automatically logged in: autologin-user=user224348 autologin-user-timeout=20 user-session=ubuntu This is ...
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Ubuntu 20.04 lightdm user forced to SystemAccount=true and invalid Icon= value

I have a new installation of Ubuntu 20.04 Desktop. The Display Manager is lightdm, which is default for Ubuntu 20.04. On this system, I configured one user (user1, id=1000), and logged in to the ...
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lightdm incompatibility with .profile commands

For many years, I have used kornshell as my default shell. I'm used to it; I like it. As such, I have several features in my login .profile as well as in /etc/profile (functions, references to those ...
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Which process handles XF86 keys?

There are multimedia buttons in my keyboard, the key I am actually interested in are Brightness keys (XF86MonBrightness{UP|DOWN}). I am using bspwm window manager, and without any sxhkdrc config the ...
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Plymouth theme does not display immediately after building from source/Lightdm greeter is not displayed at all

I'm having hard time with Plymouth/Lightdm/Grub configuration. I don't know why, but Plymouth theme (spinfinity) is displayed significantly later then before. I checked initramfs-tools (unpacked boot ...
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Using default cinnamon greeter instead of LightDM

I am currently using the LightDM greeter in my Cinnamon Desktop enviroment on Arch for my login screen, however from the times I used Linux Mint Cinnamon, I remember that Cinnamon comes with its own ...
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Can't use keyboard and mouse in lightdm lock screen

Today I installed lightdm and its default greeter. Then enabled it using systemctl and rebooted my computer. After the greeter lunches, I can't use my keyboard and mouse so I can't do anything. I'm ...
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How do I know which audio sink is used by lightdm?

I have an Ubuntu 21.10 and I connect to it with ssh then I run the commands below. How do I find which audio sink lightdm related pulseaudio is using? PS: my goal is to set the audio sink to ...
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WSL: LightDM using VT7 for some reason during boot. Unrecognized option: vt7

I am in WSL Debian 11 with KDE-Plasma, LightDM and LightDM-GTK-Greeter installed. I am using systemd-genie to run a VNC server as in this tutorial. On running genie-s: hide@DESKTOP-BUQISCV:~$ genie -s ...
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gdm3 or lighdm not working (X11 won't start)

I am using Debian 9. After installing Gnome I only see my mouse cursor on my computer screen. I uninstalled Gnome and enabled X11 but it didn't work. I need to connect to the board I use via ssh and ...
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Raspberry pi OS can't load lightdm

Running the Pi using physical monitor works fine. But without HDMI connection, The NoMachine couldn't find any display running. Trying start lightdm using service lighdm start via ssh didn't works, as ...
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lightdm goes black after suspend on ubuntu studio 20.04.3

I've been experiencing this issue for weeks now. I have a Lenovo Thinkpad X1 Carbon Gen 5 running Ubuntu Studio 20.04.3 (kernel 5.4.0-81-lowlatency), and sometimes - not always - when I suspend it and ...
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How to resolve this graphics driver related issue on Manjaro 5.10.42-1?

I was attempting to install the DirectX 11 drivers on my machine. I followed this tutorial, which resulted in lightdm not starting up. I'm not sure how I did that exactly. I then followed this ...
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Cant lock screen on xfce

A few days before, I wanted to try out xscreensaver as it is knows for its cool screensavers. So I installed that by: sudo apt-get install xscreensaver xscreensaver-gl-extra xscreensaver-data-extra ...
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Can LightDM greeter blank the screen to save power on laptop?

LightDM would display the greeter (login box) after Lock Screen was activated. The display with the greeter would stay on and I suspect that would chew up battery (I'm using a laptop). Is there any ...
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SSSD+LDAP+lightdm issue

I have one LDAP server and a linuxMint client with SSSD. When I login with a user with an expired password lightdm give an advice about it and stop the login, but it never prompts a textbox to change ...
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Blinking screen after messing with lighdm greeter at Zorin OS 15 Lite

Ok I messed up I was trying to modify our login screen in Zorin 15 Lite and when I rebooted my laptop I couldnt even access the login screen. My monitor keeps blinking and it renders only the mouse ...
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Authenticating as any user using admin credentials

I manage a bunch of laptops in my household, and while I can do most things over SSH, sometimes I just need to physically sit down at someone's logged-in desktop environment. If the user is around, I ...
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Dual monitor in Debian Buster

I am running Debian Buster with backports on Intel i5 board with Z590M chipset. After many experiments I succeded with setting dual monitor using embeded Intel graphic UHD730. I had to use 5.10 kernel ...
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LightDM won't boot after changing graphics card

I changed my graphic cards from nvidia to a radeon R200 and now LightDM won't start even though I installed the new drivers. I'm using Arch. Can anyone please help me? EDIT: I can't copy the logs ...
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Can't read ~/.Xauthority after implementing NFS Kerberos mount

I'm using Debian Buster where I have Kerberos, LDAP and SSSD working. I was mounting my home directory on the client using NFS however I realized it was insecure. So I implemented Kerberos mounting. ...
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LightDM running command after authenticating (pam_exec or other)

LightDM allows using dm-tool lock to "lock" the session. But I can't find config responsible for authenticating in /etc/pam.d. /etc/pam.d/lightdm - is only during initial login to session /...
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Enable lightdm autologin using sed

I need to edit /etc/lightdm/lightdm.conf using sed inside specific section, uncomment and set value. This section is [Seat:*] and line is #autologin-user= I expect this change: Before: [LightDM] . . . ...
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Empty login screen with two monitors (lightdm)

I'm using Kali Linux 2020.4 with xfce4=4.16 and lightdm=1.26.0-7. I have two monitors setup: HDMI 1920x1080 (shows up as 2nd, HDMI1 in xrandr) and VGA 1366x768 (shows up as 1st, DP1 in xrandr), using ...
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How do I use dm-tool switch-to-user from outside of dm session?

I'm trying use dm-tool switch-to-user from outside of a session (I want to eventually call this from a systemd service) I've followed the instructions on the man page on setting the XDG_SEAT_PATH ...
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error bootmessages. PAM unable to load. PAM adding faulty module

So when booting my Mint 20.1 I always see a short error. With journalctl -bI can see the following suspecious logs Feb 16 15:28:43 username-home kernel: ACPI Error: Needed type [Reference], found [...
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How do I switch between users, without logging out?

I am using Lubuntu, my desktop environment is lxQt and screensaver is xScreensaver. I'm trying to figure out a way to switch between users, (e.g. when pressing meta + L). Even though, it is possible ...
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Cinnamon not detecting nvidia package drivers arch

I have just come from Ubuntu so getting used to Arch at the moment. I have installed the cinnamon DE and lightdm. However whenever I boot into cinnamon I get a dialog telling me to check my drivers, ...
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LightDM is ignoring /etc/login.conf and ~/.login_conf

LightDM is ignoring /etc/login.conf and ~/.login_conf LightDM is ignoring anything defined /etc/login.conf. Even if I modify it and rebuild the database as instructed, LightDM still does not apply ...
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American megatrends logo is displayed between plymouth end and lightdm start

In order to create an home made kiosk system I installed Ubuntu 20.04 Server. I configured plymouth to display my custom theme and set up the auto login using LightDM. After the auto-login is complete ...
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Ridiculously large amounts of RAM used (by lightdm)

Lately, my Arch setup is experiencing some problems. For one, a command Xorg :0 -seat seat0 -auth /run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch takes up about 25% of RAM (htop tells me this). ...
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3 votes
2 answers
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LightDM: how to distinguish users with the same name?

I am using LightDM with the Slick Greeter. In my system, I have two user accounts for myself. They have the same name, but different user names. I want to separate private and professional work. ...
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1 answer
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Mint Cinnamon shows login screen but not desktop

Yesterday I updated my computer using apt and walked away to let it run. I ended up being away from it for a few hours. When I got back I saw that it was done, so I closed the terminal and shut the ...
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Arch Linux Not Working After I Change Display Manager To Lightdm

So I thought about switching to LightDM. I switched by doing sudo systemctl disable sddm sudo systemctl enable lightdm Then I restarted arch linux and everything ran fine. But then I thought about ...
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I cannot access XFCE when launched via LightDM

As a personal project I decided to start building a Linux From Scratch (System V Edition, 9.1) on a virtual machine. Everything went out correctly until the moment of entering the system through ...
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No HDMI signal on TTY7 when running Buster + NVIDIA GT 640 + nouveau + 4K UHD

Symptom Upgrading from a WQHD ViewSonic display to a giant 4K UHD ViewSonic display yields a No Signal error (via HDMI) after my workstation successfully makes it through GRUB and Plymouth screens. ...
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Unable to use mouse and keyboard in Lightdm test mode

I have a Debian Buster as a VirtualBox guest, and when I run /usr/bin/lightdm --test-mode --debug I am unable to use both mouse and keyboard. (Ctrl+Shift does not help) it outputs: [+0.00s] DEBUG: ...
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Set certain desktop environment as default, and revert back to it after reboot

first of all, let me put a few things out of the way: I'm about to manage a few (semi-)public workstations with Linux Mint 20 that a lot of different people have access to. And you know people; they ...
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Copying picture to /usr/share/backgrounds/ with a script [closed]

I'm trying to copy a picture which gets selected with another script to /usr/share/background/ so that I can use it with lightdm, but I can't get it to work. I tried the usual cp "$file" /...
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How to run script when switching to specific (already logged in) user

There's plenty of info out there on how to run a script at login (add it to .xprofile etc.), but I'm looking for a solution that will run a script/command not just at login but also every time a ...
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GDM does not start on boot

GDM does not start on boot: I'm having same problem I also read tis problem that you solved before, I tried that but got nothing. Please help me im stuck in try.
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How to start user session (login user graphically) from CLI?

We can use loginctl in modern distributions with systemctl to control the user sessions, seats etc. E.g. with it is is trivial to logout users and works on all desktop environments. However, can I ...
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