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

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What is the “Light Display Manager” user account? [closed]

I installed Ubuntu 13.10 and suddenly I see a new user account to log in to (besides mine), called "Light display manager". Could someone explain why this account appears?
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Intel Haswell strange graphics and boot issue

I build a new system with a Core i5-4570S CPU and I use the internal graphics card. I can Install Ubuntu 13.04 without problem and everything seems to work fine, but during boot and when I turn the ...
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1answer
341 views

low graphics mode error only during shutdown

I'm getting the message: "The system is running in low graphics mode. Your screen, graphics card and input device settings could not be detected correctly. You will need to configure these yourself." ...
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1answer
729 views

“dm-tool lock” doesn't lock my session

When I use dm-tool to lock the screen for userA, I can log in as userB and then use dm-tool to switch back to userA's session without having to enter a password. Is that the expected behavior? If ...
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Disabling the guest account and session selection in lightdm [duplicate]

Possible Duplicate: How do I disable the guest session? Is there a way to disable a guest account in (x,k,u,l)buntu's lightdm? Also - is there a way to disable session selection in lightdm? ...
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How to fix Ubuntu 14.04 LTS login screen hangs with “logging in…”

Anyone have suggestions for this: I upgraded my Ubuntu system to 14.04, and the upgrade failed miserably. I was forced to restart the system in order to get to a login. After following several ...
4
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1answer
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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
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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 (http://www.smdavis....
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695 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 ...
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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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3answers
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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 ...
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1answer
452 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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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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2answers
17k views

How to change the default Desktop environment (That appears in the greeter) in 14.04

Previously I navigated to /etc/lightdm/lightdm.conf and changed user-session=ubuntu. lightdm.conf doesn't exist in Ubuntu 14.04 at that location, so how do I change user-session=ubuntu to something ...
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4answers
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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
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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
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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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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 ...
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4answers
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Ubuntu 14.04 - No Unity in user account, but in guest account

Yesterday I switched back from Linux Mint to Ubuntu 14.04 and after installation I faced the following problem: When I login with my user account Unity isn't loading. I can see no desktop elements - ...
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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 ...
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 ...
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4answers
27k 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 ...
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3answers
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no login screen after change from lightdm to xdm

On 12.04 LTS, I typed "apt-get install xdm" - then a window asked if I wanted lightdm or xdm, and I selected xdm. Then I rebooted but the display only showed, for a very long time, the word "ubuntu" ...
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2answers
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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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1answer
412 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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2answers
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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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1answer
178 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?
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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 ...
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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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1answer
733 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
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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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4answers
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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 /var/log/...
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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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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
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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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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
591 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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1answer
183 views

startx doesn't work on ubuntu 16.04

I modified grub, so that whenever I boot, it starts in command line mode. However, when I type startx, it gives me a screen with the ubuntu background on it and my cursor is an x. I can open things ...
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2answers
44 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
454 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 ...
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1answer
220 views

Two different login/lock screens

I have Ubuntu 15.10 installed and when I first start my computer it gives me the really nice looking ubuntu lightdm login screen but anytime I lock the computer I get the really nasty looking gnome ...
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1answer
175 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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1answer
3k views

How to change the Desktop Manager

When I installed KDE Plasma in Ubuntu 15.04, I set the LightDM as the default manager, But I want to set KDM as the default, how can I change this?
3
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1answer
3k views

How to start lightdm services at startup

My system is running Ubuntu 15.04 and I've changed default boot to "text" instead of "quiet splash" by going through answer by @Bruno Pereira How do I disable X at boot time so that the system boots ...
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
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1answer
12k 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 ...