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

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Login loop with new install of 14.04.03 (twice) on Acer Inspire 5742ZG with AMD Radeon HD6370M graphics

Enter correct password, takes it, screen goes blank then the console messages appear : Starting LightDM display manager Stopping Send an event to display plymouth is up Then it goes back to the ...
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82 views

Lightdm broke, have to manual login via bash

I had a problem with Lightdm, each time I put my pc to sleep and wake up, it showed up no user, but asked for password and none worked. And I don't know if it's dumb, but I also ran locate lightdm | ...
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28 views

How do I completely uninstall default Unity Greeter and use text mode login instead? [duplicate]

If I would like to completely uninstall the default Unity Greeter and use text mode login instead, how should I go about it? I am using Ubuntu 14.04 LTS - the regular flavor; with Unity. I prefer a ...
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2k views

Starting Light Display Manager hanging

I just installed Ubuntu 15.10 on a pretty old laptop. Everything went well, installed proprietary amd drivers and did my first reboot. Aaaand ... it's stuck. Here is a picture of what I get at ...
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61 views

Ubuntu 14.04 Trying to Set Login Screen and Gsettings Fails with Error

Following instructions in other posts that involve dconf-editor or using su lightdm -s /bin/bash, I hit a big hurdle with the following error: olefoxx@Don-L355n2:~$ sudo -i [sudo] password for ...
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88 views

trying to figure out what happened with lightdm and Xorg

thank you for trying to help me with this issue! :) So I installed bumblebee and then my screen got a low resolution after my pc crashed (not related, cat pulled electric cable ;) ). To fix this issue ...
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671 views

No login screen after upgrade to 15.10

The system is up and running, I can login with Ctrl-Alt-F1 or ssh -X from another computer. I can run graphical applications over ssh. The problem is that the login screen is gone. It's just a black ...
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1answer
8k views

gdm not working with Ubuntu 15.10

I just upgraded to 15.10, and everything went smoothly. One of the first things I did was install gnome-shell, and switch from lightdm to gdm. However, when I restarted, after an initial purple Ubuntu ...
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173 views

After Nvidia driver installation System Running on Low-Graphics

After I have installed the NVIDIA Driver I am unable to login to the Ubuntu 15.10. When I log in I get the error SYstem Running on Low Graphics Mode and from there I am unable to reconfigure the ...
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1k views

lightdm - Job failed to start (xorg problem?!) / bumblebee/cuda related?

Please work through my wall of text, need help!! Thank you! Booting up my laptop this morning, I encountered the following problem: Boot to black screen with no responsiveness, couldn't even get to ...
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25 views

Desktop logins are broken on 15.04

My system has been running fine for several weeks with 15.4; I turned it on last week and saw a yellow message scroll past too fast to read and I cann't login to the desktop anymore. There is no ...
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46 views

pam_mount, pam_ldap and screen unlocking

I am having trouble getting these three components to work in an ldap environment: authenticate the ldap user mount a folder (type cifs) on login using pam_mount be able to unlock the screen once it ...
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1answer
74 views

how to kill a lightdm window without losing the session?

My laptop was locked (showing lightdm unlock screen), and the battery went off overnight. When I charged it up again there is the lightdm or gnome window asking me the session-end question "user, you ...
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1answer
210 views

Install ligthdm after autoremove lightdm

I think I did a big mistake and autoremove through sudo apt-get autoremove lightdm instead of remove lightdm. So in my little knowledge about Linux I think I removed more than lightdm. I ...
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1answer
138 views

another login loop problem

Since last week I'm also faced with the endless-loop problem using ubuntu 14.04.3 (installed in dual-boot on HP 840 EliteBook). Upon login the screen turns black and returns to the login interface.I ...
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52 views

Starting Version 219 after ati proprietary driver install 3.19.0-30

I have seen the other help items regarding the "Version 219" errors. Here is my issue: 1. Install ATI Proprietary drivers (because everything else I tried to do to speed up Unity and system response ...
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55 views

lightdm stop fails after software update

The recent update for Ubuntu 14.04 broke my manually installed Cuda driver. To reinstall, I dropped to a terminal with the intention of reinstalling via: ./cuda_7.5.18_linux.run --no-opengl-libs In ...
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1answer
23 views

Building custom live Ubuntu Gnome 3.12.2 based, only for GDM: authentication failure

I'm building a custom live Ubuntu Gnome 3.12.2 based, Only if I create a new user, set password and add him to sudo group, setting by dpkg-reconfigure GDM ad default greeter, obtain a black screen ...
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Cannot log in to GNOME with XMonad sessions

I'm running ubuntu 14.04.3LTS. I recently installed xmonad via apt. When I log in, I have three options: GNOME with Xmonad Ubuntu (Default) Xmonad Ubuntu works fine, as does Xmonad. However, when ...
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40 views

Using ONLY Pamusb as authentication

Is it possible to only use pamusb to login (into xfce/lightdm) and not have a password at all? When I try to change pamusb to required in /etc/pam.d/common-auth and comment out the password thingie I ...
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1answer
671 views

I can't install Pantheon Greeter in Ubuntu 14.04

I want to install pantheon Greeter from Elementary OS in Ubuntu 14.04. When I follow every tutorial on the web I get it in the Terminal: Some packages could not be installed. This may mean that you ...
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31 views

GDM fails to launch xfwm4, but lightdm succeeds?

I use GDM and usually run an XFCE4 session. Suddenyl, if I attempt to boot in using GDM, the following symptoms appear> 1) the GDM background does not go away 2) windows from two applications (remains ...
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186 views

Lightdm Login Loop - Ubuntu 15.04

Recently, my Nvidia video card failed (Hardware Failure) on me. I uninstalled the drivers and updated mesa-utils (after proper Nvidia cleanup) , added linux-generic and tried to login. No matter what ...
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332 views

Synergy + LightDM = no autostart?

I've installed Synergy v1.3.8 on my Ubuntu machine at work (latest one in repo although I know that the latest stable is 1.7.4). I have read the instrunctions on how to make this thing auto-start ...
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316 views

Desktop froze, rebooted, now login loop

First firefox froze, so I started System processes and ended firefox. Then it happened again but when I ended firefox in System processes the whole desktop froze. So I pressed the restart button on ...
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43 views

Thinkpad W540 internal input devices not detected in Ubuntu 15.04

The touchpad, trackpoint, and keyboard aren't detected after boot. I know that the keyboard still works because I can use it to navigate the BIOS. Looking at my X server's log, I can see that my ...
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43 views

Ubuntu Guest Session Works, Regular Session Not (LightDM Relog / GDM Black)

I tried all sorts of stuff posted on forums and nothing works e.g. removing fglrx or reinstalling ubuntu-session and other packages. All done to no avail => I log into regular user "mashup", get ...
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179 views

xsession-errors

when I logged in to my desktop and listed the contents of the .xsession-errors file in my home directory, the following is found . kindly let me know what to do to correct the errors mktemp: failed ...
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493 views

Ubuntu 15.04 Hangs on “Starting Light Display Manager”

I was using my computer earlier today and after having problems with Steam, I rebooted my computer to have it hang on "Starting Light Display Manager". I believe I have seen every relevant question, ...
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133 views

Unity GUI won't start, compiz crash?

I upgraded and rebooted today and now I can't get Unity / X Window to start. I used to have it auto log-in since I was using the computer for kodi (xbmc). Now I get a purple screen with dots, which ...
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351 views

Changing default resolution system-wide in Ubuntu 15.10

Ubuntu 15.10 uses the native resolution of the screen by default. The native resolution on my laptop (3200*1800) is too big for the size of the screen (13"), leading to a very high pixel density, it ...
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426 views

CUDA install causing login loop

I have configured & installed CUDA twice already, both from completely fresh installs of 14.04.3 LTS (worth noting the machine dual-boots Windows 10 [separate drives though]). Both times, after a ...
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34 views

Installed Nvidia driver, can't get back to unity

so i updated my video driver on my pc with the latest from the nvida website. I disabled the lightdm service and went to init 3. but after the install I cant get back to the unity desktop. it loads ...
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23 views

Login screen doesn't hold

My login screen appears for 2 seconds only, falling back to a black screen with the booting "verbose" text. I can still log in by simply typing my password and pressing enter. This issue only ...
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1answer
673 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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1answer
73 views

No password required for user login [duplicate]

I am running Ubuntu 15.04, but I have had the problem since 14.04. When i start the computer, the login screen shows up but i don't need to enter my password to login. I also cannot lock the computer, ...
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121 views

Set lightdm/login to default

I tried setting the login screen background to my wallpaper, and this works for locking once I'm signed in, but when I boot up I just get a solid color purple screen, and it totally glitches when I ...
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116 views

Now that `/usr/share/backgrounds/warty-final-ubuntu.png` has changed, where is the solid purple background screen file stored?

Now that /usr/share/backgrounds/warty-final-ubuntu.png has changed, where is the solid purple background screen file stored? /usr/share/backgrounds/warty-final-ubuntu.png is the default background, ...
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15 views

Lightdm. Why is it hangs if the camera is connected

We using ubuntu on all pc workstations. There are ten machines with installed ubuntu 12.04, 14.04 versions, most of all has an issue with lightdm. Once it starts, it hangs. We see login screen, ...
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77 views

Stuck in login loop but can't get to tty

I recently installed ubuntu 15.04 and on second boot I can no longer login as I am stuck in the login loop thing that seems pretty common. After first boot I installed virtual box and nvidia drivers. ...
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468 views

LightDm does not have permission to read path (xubuntu Greeter Settings)

I'm trying to set a custom background for the login screen through "LightDm GTK+ Greeter Settings: whatever path I set I get an exclamation point next to the word Background with the error (on ...
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1answer
337 views

14.04.3 Login screen loop Graphic card failure

I'm running 14.04.3 on a ASUS Netbook X201E. Today, I was'nt able to login to my account. lightdm starts abnormally. The top bar is'nt displayed. After attempting to log in with correct password ...
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35 views

Running a Kiosk App from session-setup-script

I'm using Lubuntu 14.04.03 to create a Kiosk. I want that the Kiosk displays a custom App made by us. I'm using lightdm session-setup-script to do so. I have created the following file: ...
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1answer
103 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?
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1answer
161 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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272 views

Light display manager wont start on boot after updating to ubuntu 15.04!

Hello all Ubuntu experts. I am a bit of a noob when it comes to updating OS and upon updating from Ubuntu 14.10 to 15.04 I see lots of programs (I think) that say OK next to it. The list keeps going ...
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573 views

Ubuntu not starting post cuda installation

I am running Ubuntu 14.04 alongside windows 8.1 on an HP Envy 15 laptop having Nvidia gtx 850m graphic card. I was trying to setup the cuda programming environment as given here ...
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Unity greeter wallpaper change every minute

I have script that changes Unity Greeter wallpaper location every minut, but problem is that it doesn't show new wallpaper unless i login in to any user account and switch back to Login screen ...
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1answer
200 views

User switching broken in 14.04

I just upgraded to 14.04. I have an nVidia graphics card and am using the nVidia driver (proprietary, tested). I am using gdm as I don't light the look of lightdm (also, I have two monitors and it ...
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63 views

How to reset default xsession automatically?

I want to setup lightdm so that even if I login once using a different session the default login session for my user doesn't change. I tried making .dmrc and a two files in /var/ for my user ...