LightDM (Lightweight Display Manager) is a Display Manager for the X.org X server.

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How do I set the login manager to enable `change languages` at login?

How can I recompile the source to force the option to allow changing languages and keyboard layouts at login?
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How do I switch back to GDM and have it launch at boot?

So I got rid of Lightdm but how do I get GDM to launch at default. It hangs on "checking battery state" this is in virtual box if that matters. I want GDM login to load by default instead of me ...
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Problem with nVidia GPU, not working lightdm

I'm trying all day to get my nVidia GT650M working, but without success. I tried to switch graphics card in nVidia Prime, but after logout screen goes black and Light Display Manager won't start, ...
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2answers
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Can I reload monitors.xml without restarting LightDM?

I was writing myself a short script to turn off my laptops monitor in order to only use the bigger external monitor, as I don't always want to use Unity GUI. But after turning the laptop monitor back ...
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1answer
5k views

LightDM: “Failed during authentication”

After entering login info in lightdm, screen blacks out for a second and returns back to the login screen again. However, I'm able to login through TTY and gdm without any problem. As the log file at ...
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“the system is running in low graphics mode” I get this message when I boot my ubuntu

I had got into a serious problem while solving my the system is running in low graphics mode using this link. This guy and I have almost same Nvidia card. Mine is just bit more newer, so when I was ...
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Restarting LightDM after running nvidia-xconfig results in unresponsive text-only display

So, for awhile I've been trying to get my external display to work. I'm running a Nvidia Geforce 305M graphics card in a Lenovo IdeaPad U460s. But when I open Nvidia X settings (Ubuntu 11.10 btw) a ...
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1answer
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How can I start an Xvnc server at boot?

I used to have a Xvnc server that was running at boot on my Ubuntu 9.04 OS and I would like to do the same with 11.10. The procedure I followed at the time was this one. There was some configuration ...
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395 views

Is “gdmflexiserver” part of the default installation?

While playing around, I discovered a folder in my $PATH that I did not recognize: $ echo $PATH /usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games $ ls ...
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How do I use LightDM with GNOME3?

I just installed GNOME3 following the steps from another question sudo add-apt-repository ppa:gnome3-team/gnome3 sudo apt-get update sudo apt-get dist-upgrade sudo apt-get install gnome-shell then ...
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123 views

Installing Brasero removes 100+ packages and impairs internet and display manager

I was thinking to have solved one problem with Paraview but have come across a bigger one with Brasero. A few days ago I wanted to install Paraview (amd64) in my computer (x68_64, Ubuntu 12.04 LTS) ...
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754 views

How do I reboot login screen?

After locking Ubuntu 14.04 and invoking login screen sometimes I get the page with disabled password field. How can I restart login screen in command line without restarting whole X server?
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How can I make lightdm scale on a hidpi screen?

I have a laptop with a 3200x1800 screen. When I start up my laptop, lightdm doesn't scale to the resolution and looks tiny. When I lock the screen afterwards, lightdm scales and looks fine. I found ...
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MATE not showing up after install

I just used Synaptic to install MATE Desktop Environment on my Ubuntu 14.04 computer. It installed successfully, but after rebooting, it's not showing up on the login screen. My only options are to ...
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1answer
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LightDM is missing Gnome Shell icon

the Icon of Gnome shell is missing from lightDM.. I had to manually add Gnome Shell to lightDM because it didn't install properly on my machine. now I don't now how to add the Icon to lightDM. Im on ...
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619 views

How do I get the session option for KDE in the login screen? (installed kde-full)

I've installed the package kde-full in Ubuntu 12.10. As I know I should be able to switch to KDE on the login screen, after it is installed. However, I only see two options: Ubuntu 3D Ubuntu 2D ...
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1answer
494 views

How to use pam_blue with lightdm, and unity-greeter?

I want lightdm to skip asking for my password if my phone is nearby. How is that possible with lightdm, and unity-greeter? Also I'm interested in knowing whether its secure, because it doesn't seem ...
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How to fix Xubuntu LightDM Theme after installing unity.

After successfully installing Xubuntu 12.04.1 on my laptop, I decided to install Unity. That went OK but then I realized there was no themes. So then I installed the themes and artwork, and got a ...
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how do I remove the last connected users from the lightdm greeter list

With gdm3, I was able to remove the last connected users from the list by removing the file '/var/log/ConsoleKit/history' With lightdm, the last users appears even when : removing ...
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How can I get a manually created user to show up on the log in screen?

I need to create a user manually (need a specific uid and default group), but I would also like to be able to log in via the standard 12.04 login (lightdm). I cannot figure out a way to do both of ...
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Unable to login as root from the login screen even though I have a root account

I have installed 12.04 LTS but surprisingly not able to login as root. I have unlock and set the password for root but while login i can not see 'other' option in GUI login where i can put root id and ...
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LightDM will not start after stopping it

[UPDATE: I appreciate the suggestions you posted, but since I couldn't make anything work in the end, I ended up re-installing Ubuntu a little while ago.] I am running Ubuntu 11.10 "Oneiric Ocelot", ...
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How do I add “Recovery Console” and “User Defined Session” in the login menu?

Ubuntu 11.10 was loaded without a hitch however to obtain Classic Fallback I followed the following instructions - http://www.liberiangeek.net/2011/08/return-to-ubuntu-classic-desktop-in-ubuntu-11-10/ ...
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1answer
562 views

Where can i find the lightdm folders and and images

I am trying to build my own greeter for Ubuntu 11.10 and amd looking for all the folders that are being used by lightdm. So far i have located the .conf files and the unity-greeter folder but it seems ...
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How to stop the login server?

With GDM removed in Oneiric, what command can I replace from the old command? sudo /etc/init.d/gdm stop I need to install an nvidia .run file and cannot figure out how to stop the server.
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How can I remove AbiWord?

I've just installed Lubuntu, and then I threw Cinnamon on top of it. Every time I log into any session: gnome, cinnamon, lxde, abiword opens immediately, as if I had told it to. I'm not a fan of this ...
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129 views

Unknown xubuntu screen locker / password

I have a regular ubuntu installation which I then installed xubuntu desktop over. I am occasionally confounded though by an unknown "screen locker" that occasionally appears instead of my normal ...
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2answers
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Removing the white dots from lightdm on 15.04

I have tried the approach that I have used before on earlier releases of Ubuntu but on 15.04 I have found that the following commands are not working. sudo xhost +SI:localuser:lightdm sudo su ...
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1answer
8k views

How to set GNOME as my default desktop environment?

I just downloaded GNOME-Shell. And at login screen it's give me to choose to set desktop environment, But I want to set GNOME as my default desktop environment. Although I tried the possible ...
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GDM and Lightdm don't work after update; KDM is ok

After updating Ubuntu (apt-get update, apt-get upgrade and apt-get dist-upgrade) last Tuesday, GDM stopped working, and the startup hangs on the Ubuntu logo. Lightdm also don't work (same happens). If ...
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I have to restart lightdm after run

After starting the system, i've a black screen (without any screen backlight), then i have to switch to tty6 (ctrl+alt+f6), login and restart the lightdm: sudo service lightdm restart I'm using ...
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Not able to login through GUI in Ubuntu 12.04

I'm unable to login through GUI. On typing the correct password, I get a black screen and back to login screen. However, when tried with tty1 I was logged in. Then I tried reinstalling lightdm and ...
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Is it possible to use auto-login in Lightdm even with encrypted home?

Configuring the auto-login in lightdm is possible as answered here. I tried but, still I'm not able to auto-login. It seems as I haven't configured auto-login. Is this because my home folder is ...
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464 views

LightDM and the need for a greeter in set-top box environment

Lightdm can be used in a set-top box environment, ie starting a configured X session as a configured user; in this case all data will be retrieved from the config file. Can lightdm work/be installed ...
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380 views

Can't start LightDM after recent kernel update

Whenever I boot, it show Plymouth then goes to a screen full of boot log, I -think- the only relevant part is Starting Wait for Plymouth Boot Screen to Quit...es.ileged Tasks.s..p link was shut ...
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How to configure a password for LightDM VNC connection

I have ubuntu 14.04, and am using lightdm. I want to login to the machine from another (windows) computer using VNC. By using the following /etc/lightdm/lightdm.conf I get a VNC server, but when I try ...
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How to disable shutdown/reboot from lightdm in 14.04?

In 12.04 it was possible to prevent system shutdown or reboot from the login screen by adding the following restrictions in /etc/polkit-1/localauthority/50-local.d (adapted from here): [Disable ...
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13.10: Can't log in

So I've tried just about every fix I could find out there, but I still can't log in to my account. When I enter the correct password, the screen goes black for about a second, the cursor disappears, ...
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647 views

Another black screen after Nvidia driver installing

I've installed the lastest Nvidia driver for my Graphic Card (a .run file), I've followed Nvidia instructions (http://us.download.nvidia.com/XFree86/Linux-x86/331.20/README/index.html) and placed .run ...
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1answer
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Black Screen on Login 12.04.3

I've recently installed a fresh version of Ubuntu 12.04.3 Desktop. At login screen, everything is black except for my mouse cursor and blinking underscore at top left. I can hear the Ubuntu startup ...
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x-server won't start - black screen (after purging *nvidia* files on HD4000 system)

For about three months now I've been trying to fix a problem with my x-server. The problem occured after lightdm starts as usual. After entering the password to my account the loading-screen showed ...
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Xubuntu LightDM shows blank screen half the time [closed]

System info: (will be amended if any more info is asked for) My laptop runs Xubuntu 12.10. As it has a Solid State Drive, /tmp, /var/tmp, /var/log and /var/log/apt are set to tmpfs in the /etc/fstab ...
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1answer
461 views

How to run python script at login screen?

I use a python script to set brightness to zero. #!/usr/bin/python import dbus bus = dbus.SessionBus() proxy = bus.get_object('org.gnome.SettingsDaemon', ...
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1answer
667 views

Cannot restart Ubuntu after replacing Unity with Gnome and purging lightdm

I am running Ubuntu 11.10. I used the directions here to replace Unity with Gnome. It seemed to work fine until the end of step 2 when I rebooted the computer. When I chose the default option, I just ...
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1answer
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LightDM not responding to XDMCP requests 12.04 LTS

Since a recent upgrade from 10.04 LTS to 12.04 LTS I can no longer login using XDMCP (ssh -XC is okay). This is similar to an earlier question but the answer (add xserver-allow-tcp=true) didn't help ...
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Working around Active Directory Users

In my office system, Ubuntu is configured for Active Directory authentication with Windows using likewise open. I have three issues. Each time when I switch on my system and some times when I ...
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Once authenticated once, passwords are cached in lightdm

We are preparing 12.04 LTS for our userbase and have done some basic configuration to the login screen (disabled guest account, removed user list, etc). However, one thing that I've noticed is that ...
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698 views

LightDM run desktop for one session “This session Only”

I sometimes experiment with many different desktop environments, some of which can be unstable. I have had a few times where I needed to drop into root shell, disable auto login, then log into my ...
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1answer
793 views

No login screen after logout

this is my first question about Ubuntu :) Since this morning when I log out (top right icon, log out) I don't get the usual GUI login screen but I get this instead: If I log in with the Ubuntu 2D ...
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1answer
244 views

No Unity session after update

After I updated Ubuntu 11.10, LightDM won't show the Unity entry anymore. What can I do, to get the Unity (3D) entry back? NV drivers are fully working. I installed Gnome 3 weeks before.