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

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Unable to sign in. How to debug?

I had to reboot system with reset button. After reboot I can't sign in. When I enter my password It seems like X-server just restarts. I can sign-in as guest and also I can sign-in in text TTY. Here ...
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2answers
7k views

Which command locks screen with lightDM?

I used to lock screen with this command, but it stopped working recently, probably after update. I'm running VERSION="13.10, Saucy Salamander". How can I restore this function? $ gdmflexiserver ...
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2answers
3k views

How to return the login screen of the original unity ubuntu?

I've installed the LightDM GTK+ Greeter 1.7.0 as below sudo add-apt-repository ppa:lightdm-gtk-greeter-team/stable sudo apt-get update sudo apt-get install lightdm-gtk-greeter ...
3
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2answers
691 views

How to return to the GUI?

I am very new to Linux and Ubuntu. I use Ubuntu 11.10. I was trying to exit the X server (in order to install some Nvidia drivers) and I typed in the terminal: sudo service lightdm stop How can I ...
3
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1answer
1k views

Set desktop default to Unity 2D remotely?

Is there a way that I can set the default desktop to Unity 2D without logging out? I need to achieve this remotely as I don't have direct access to the computer.
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2answers
21k views

Set default user session to XFCE4

How do I set the default user session to XFCE4? I have tried: sudo /usr/lib/lightdm/lightdm-set-defaults --session xfce sudo /usr/lib/lightdm/lightdm-set-defaults --session xfce4 sudo ...
3
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3answers
6k views

enabling a user (created with adduser command) for lightdm graphical login

I just installed Ubuntu 12.04 AMD64 on a new (empty) hard disk (because the previous crashed) Since I am quite familiar with Debian, I created two accounts with the adduser command. Since I am also ...
3
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1answer
430 views

If I fill my harddrive, why can't I log in?

I was stupid, I kept ignoring the warnings that my harddrive space was running low and left a download running in the background. When I logged out, I wasn't taken back to the login screen (LightDM), ...
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4k views

Can I pass a dpi flag to lightdm to set the proper DPI for X?

What is the proper way to set DPI value now? gnome-tweak allows to set only scaling factor, which is unsatisfactory and also not all applications take that into account (Chrome for example). I would ...
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3answers
9k views

Type password into login screen, hit enter - nothing happens

I first install Ubuntu 13.10 a few weeks ago and its been going great. I'm still pretty new to Linux, so I haven't been doing a whole lot. The past couple days I've tried installing LAMP, then ...
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3answers
6k views

How do I switch users?

How does one switch users in Unity? (i.e., in the GUI, not sudo.) I really want to launch another X session using a different WM, without abandoning the current one.
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3answers
4k views

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?
3
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1answer
2k views

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 ...
3
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2answers
247 views

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, ...
3
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2answers
1k views

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 ...
3
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1answer
6k 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 ...
3
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4answers
26k views

“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 ...
3
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2answers
10k views

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 ...
3
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1answer
5k views

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 ...
3
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1answer
398 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 ...
3
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2answers
9k views

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 ...
3
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1answer
100 views

Reverted from Gnome to Unity on Ubuntu 14.04. Now everything looks weird

This is the top right corner of my desktop. The icons are completely different. Even the terminal's background has turned white. What's happening? How can I get back the old stuff?
3
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1answer
158 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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1answer
1k 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?
3
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1answer
2k views

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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2answers
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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 ...
3
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1answer
2k views

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 ...
3
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1answer
683 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 ...
3
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1answer
568 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 ...
3
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1answer
4k views

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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3answers
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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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1answer
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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 ...
3
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1answer
11k views

Which is lighter/quicker: LXDM or LightDM?

I am using lubuntu and I am just wondering whether it would be worth switching from the default LXDM to LightDM. Are there any speed advantages of LightDM over LXDM? (An answer with more than one ...
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3answers
12k views

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", ...
3
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2answers
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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/ ...
3
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1answer
579 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 ...
3
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1answer
2k views

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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28 views

Change Icon for Window Manager at login

is there any way to change the icons for a Window Manager at the login screen? This one: The files are in /usr/share/unity-greeter/ that I know, but can I change the Icon for a WM if it has none? ...
3
votes
1answer
205 views

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 ...
3
votes
1answer
154 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 ...
3
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2answers
2k views

Removing the white dots from lightdm on 15.04 [duplicate]

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 ...
3
votes
1answer
10k 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 ...
3
votes
3answers
5k views

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 ...
3
votes
1answer
8k views

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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4answers
4k views

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 ...
3
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1answer
1k views

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 ...
3
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1answer
465 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 ...
3
votes
1answer
648 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 ...
3
votes
1answer
685 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 ...
3
votes
1answer
3k views

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 ...