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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Mounting directories on demand or until logged

As from object, I want to mount some directories (with binding) at login and possibly unmount them at logout. At the beginning I tought about autofs, but it dynamically creates mount points, that's ok ...
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Failed to start Light Display Manager, stuck on black screen

I have been using Linux Mint for about a month. Today, I turned on my computer and first I got this error after the Linux Mint logo appeared. UBSAN: array-index-out.of-bounds in /var/lib/dkms/...
Ayrton Fidel Avalos Cuadrado's user avatar
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Lightdm multi screen arrangement

I run XFCE on Debian with two monitors next to eachother. The default positioning of the monitors is mixed up. I.e., when the mouse leaves the left edge of the physically left monitor it isn't blocked,...
8bc3 457f's user avatar
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Seamless login in EndeavorOS

I would like to achieve a smooth login process where there is no visible black screen during the transition from the login screen to my desktop, similar to the experience in Windows 10. Both Debian ...
vb0gizxw's user avatar
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nvidia (proprietary) output not resuming after suspend

After suspend+resume, the display connected to my NVidia card (3050 ti) with proprietary drivers on Manjaro keeps getting 'no signal' about 95% of the times. All of the standard tricks (updating bios, ...
Frank's user avatar
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lightdm: neither xdmcp nor vnc providing remote session

I want to be able to connect remotely to my daily driver (Debian 11) within my LAN from my laptop and other devices. Ssh works fine but niether Chrome nor Firefox are happy running over ssh / some ...
symcbean's user avatar
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Disable the 'Other' User Option From LightDM

I am currently running LightDM on my AlmaLinux 8.8 machine and I wanted to know if it's possible to remove the Other user option as shown below. I have already tried to edit the /etc/lightdm/lightdm....
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What is dbus_enable?

I am hoping someone can explain what dbus_enable is and what benefits it would bring should I include it. Additionally I am not sure where this would be placed however I feel it may be added to the ~/....
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No display manager after Debian 12 installation on Hyper-V

I installed (graphical installation, selecting xfce) Debian 12 on Hyper-V Gen1 VM within Windows 10. When reboot Debian no login screen appears. What cause the problem that lightdm does not start? ...
Hölderlin's user avatar
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Changing the default lightdm greeter not working on Arch with XFCE

I installed two greeters: ls -la /usr/share/xgreeters -rw-r--r-- 1 root root 187 Sep 6 2022 lightdm-gtk-greeter.desktop -rw-r--r-- 1 root root 137 May 25 04:52 lightdm-mini-greeter.desktop And ...
Alex's user avatar
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Where does lightdm store its desktop environment settings?

As you can see in the image below, on login lightdm has a certain desktop environment pre-selected, and also has the option to switch over to others. Where in the file system is this information ...
Cheetaiean's user avatar
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How to change lightdm's wallpaper per user?

I changed the display manager from sddm to lightdm. I'm using Kubuntu 22.04, and slick-greeter as lightdm's greeter. I remembered that when I was using xfce4 and changed the wallpaper in the xfce4's ...
TranslucentFoxHuman's user avatar
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How to switch lightdm-gtk-greeter to use wayland only? (x11 not installed)

I'm on a Fedora Server 37 iso, so no DM/DE is pre-installed. Install wayland, lightdm, and lightdm-gtk-greeter. Edit lightdm's config to use lightdm-gtk-greeter (Line 102) change greeter-session=...
Cameron Showalter's user avatar
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LightDM displays wake immediately after sleep

Update 2: The behavior only happens when both monitors are enabled and when lightdm-gtk-greeter is active. Disconnecting or disabling (with xrandr) results in expected behavior. Update: Seems to have ...
smjklake's user avatar
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How to make a Linux system only use english as a locale and language, but use another one on a GUI/Desktop Environment?

Let's say that I install a Linux in my native language (english), and that the user I'm doing the install for only knows spanish (which all I know of is: Que?). English being obviously far easier for ...
X.LINK's user avatar
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Lightdm sometime fails to autologin

We have some kiosks which uses lightdm with autologin. Autologin sometime does not work, this happens randomly after reboot, mostly it works but sometimes it fails. Instead of autologin login screen ...
T0maas's user avatar
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Lightdm do not have access to files under /home

Using lightdm, I'm trying to set a wallpaper on the logging screen using lightdm-settings. If I set an image under /usr/share/backgrounds it works. If I set an image under /home/me/Images, the image ...
sayanel's user avatar
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How to enter password without Keyboard on graphical login screen?

I am using Debian desktop for Lichee Pi and I am new this platform(linux). After energizing, the graphical login screen appears. But I don't have a real or virtual keyboard. Can I enter this password ...
SpeedyGonzales's user avatar
2 votes
1 answer
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Force SeatN to display :N

I have a multiseat setup using 3 GPUs, loginctl and lightdm and it mostly just works. Two small areas where it doesn't is with bluetooth audio devices and ssh X forwarding misbehaving when I'm not on :...
SHawarden's user avatar
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FriendlyArm: reset lightdm settings for autologin

I'm using FriendlyArm on my NanoPi. I tried to install and launch tigervnc-standalone-server and failed. After that I deleted it with apt autoremove. But after that my settings for autologin don't ...
Dmitry's user avatar
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My light-dm greeter only quickly shows my wallpaper then changes to the default one

I am trying to let the login greeter of my Debian unstable machine show a custom wallpaper. It shows up quickly at boot, like half a second but then it fades into the default wallpaper. What could be ...
user640916's user avatar
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994 views

Display manager not starting KDE. SDDM freezes machine at boot

This is my first post here so I apologize any inconvenience. After many attempts, I have sucessfully installed Arch and tested some DEs in a virtual machine. I tried GNOME with gdm and it went well. ...
th3g3ntl3m4n's user avatar
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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 ...
igorkattar's user avatar
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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 -...
igorkattar's user avatar
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445 views

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 ...
f.thoorens's user avatar
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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 ...
Tom42's user avatar
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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 ...
H. Weirauch's user avatar
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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 ...
Aaron's user avatar
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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, ...
aahlback's user avatar
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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 ...
user224348's user avatar
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1k views

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 ...
Afroz Alam's user avatar
3 votes
1 answer
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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 ...
Buket's user avatar
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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 ...
Inachi's user avatar
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781 views

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 ...
psychoSherlock's user avatar
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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 ...
Nghia Tran's user avatar
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0 answers
102 views

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 ...
Nazrax's user avatar
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3 votes
2 answers
1k views

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 ...
Victor Augusto's user avatar
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1 answer
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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. ...
Ben's user avatar
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1 answer
676 views

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 /...
Danil's user avatar
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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] . . . ...
T0maas's user avatar
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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 ...
Boom Tikhonov's user avatar
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702 views

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 ...
Gary van der Merwe's user avatar
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1k views

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 [...
Josomeister's user avatar
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1k views

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 ...
surfboardcompound's user avatar
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73 views

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, ...
Emily-TTG's user avatar
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3 votes
1 answer
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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 ...
Tuaris's user avatar
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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 ...
IK428's user avatar
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1 vote
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563 views

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). ...
Akshat Vats's user avatar
4 votes
2 answers
313 views

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. ...
patzm's user avatar
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1 answer
827 views

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 ...
Mr.Samson's user avatar

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