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

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918 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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1answer
35 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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1answer
203 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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641 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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2answers
403 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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1answer
49 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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47 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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1answer
234 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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159 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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392 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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2answers
560 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
1k 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 down......
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1answer
86 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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144 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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1answer
128 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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18 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, users,...
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79 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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575 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 hover):...
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1answer
355 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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48 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: /etc/...
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1answer
164 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
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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274 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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775 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 https://www.udacity....
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29 views

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 (Win+L)....
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1answer
243 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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86 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 read-...
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1answer
677 views

Ubuntu blank login screen after installing kubuntu 15.04 with plasma, only guest login is possible

I was using ubuntu 15.04 above that I installed kubuntu with plasma desktop. After reboot I can not see my login screen. all I can see is blank screen. If I press enter it automatically logging me ...
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372 views

Black screen while connecting to XDMCP server on Ubuntu 14.04

I'm trying to remote connect to my Ubuntu 14.04 workstation from Fedora 20. Both sides have Xnest installed. I'm getting a black screen on the client side when I go to connect. I'm guessing Xnest may ...
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1answer
578 views

sudo nautilus results in “cannot open display” error

$ gksudo nautilus Failed to connect to Mir: Failed to connect to server socket: No such file or directory Unable to init server: Could not connect: Connection refused (nautilus:6072): Gtk-WARNING **: ...
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1answer
286 views

xorg.conf is ignored

I created a /etc/X11/xorg.conf using aticonfig --initial which looks like this: Section "ServerLayout" Identifier "aticonfig Layout" Screen 0 "aticonfig-Screen[0]-0" 0 0 ...
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131 views

Get nvidia driver to work in gdm OR fix workspaces in lightdm

I have a lenovo with two GPUs, intel and nvidia. The problem is that if I set gdm, the driver doesn't work, and I can't switch to high performance mode. If I change gdm and select lightdm, that ...
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10 views

Problem with displaymanager

Have installed Ubuntu 15.04 Unity with double-core 32 processor. Since I have tried to install a driver for my NVIDIA Geforce 630 with NVIDIA-current I have problems with the display-managers lightdm. ...
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1answer
48 views

Lightdm appears and immediately disappears (DELL XPS 13)

I have this strange problem with LightDM. After booting, the login screen appears... and almost immediately disappears and leaves a black screen. Mouse cursor is there. If I type in my password (...
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27 views

Simulating process of logining using lightdm

Recently, I wanted to login a user manually so I tried using startx on a non-root user. I encountered with error X: user not authorized to run the X server, aborting. I found out that this can be ...
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0answers
99 views

How can I start lightdm / server X?

I installed yesterday new drivers from NVIDIA in my Ubuntu 14.04. I had to stop server X so I used the "famous" sudo service lightdm stop Today I updated my system and it seems like lightdm is off. ...
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58 views

How to enable alpha-transparency for windows in custom Xsession?

I want to run my software in kiosk mode (on Ubuntu 14.04.3 LTS). For that reason, I add a custom X-login via... /usr/share/xsessions/mycustom.desktop: [Desktop Entry] Encoding=UTF-8 Name=My Custom ...
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105 views

I can't access my login screen. After the splash screen, my screen turns white

After my splash screen, the display shows 'starting version 219' and my entire screen goes white and no login screen appears. I'm able to access tty. When I tried to start lightdm from there I got: ...
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206 views

No login screen on startup, works after logging in and logging out again [closed]

I installed Ubuntu on a client's computer. At first - no issue, but after some updates and installs (including burg, which was not the problem as the problem remained after removing it, I could not ...
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1answer
96 views

X fails to start after update

After updating ubuntu yesterday, the system boots on a dark screen (+ no signal message on monitor). Ctrl-Alt-F1 gives access to command prompt, and I tried a sudo service lightdm restart -> which ...
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0answers
48 views

Xubuntu. Suddenly black

This is what my desktop looks like now. It's completely useless, will not do anything. Nothing to right click won't even minimize a program when it's clicked on. I've had this problem before and ...
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0answers
38 views

Ubuntu 12.04 graphical interface is gone

I was trying to set up my build environment for beagleboneblack.I was following standard instructions from this site https://source.android.com/source/initializing.html I was installing ...
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0answers
66 views

How to update lightdm/metacity to classic gnome 3.12 or greater?

Need to use the numix flat theme in Ubuntu 14.04 metacity lightdm (classic gnome 3.9), but numix flat has requirement of gtk3+ and gnome 3.12 at least. How can I just update to gnome 3.12, not the ...
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320 views

Can't login to Ubuntu

I am on Ubuntu 15.04, on an MSI laptop that dual boots with windows 8. More precisely, when I type my login info at the startup screen, it waits a little while, then spends about 1/10th a second on a ...
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1answer
175 views

Is Lightdm-webkit-greeter necessary to run Ubuntu 14.04 LTS?

I want to get rid of lightdm-webkit-greeter due to the errors when I boot into Ubuntu 14.04LTS. Is it possible to run Ubuntu without lightdm? I don't want to mess up my system by removing it. I have ...
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47 views

Webkit-greeter only changes after a restart, not when logging out or locking computer

On Ubuntu 14.04, I installed the lightdm-webkit-greeter using sudo apt-get install lightdm-webkit-greeter then, I did the following to get the greeter I wanted: cd /usr/share/lightdm-webkit/themes/ ...
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21 views

Get rid of “unused” sessions in session switcher

As shown in this screnshot, whenever I enter the session switcher (it doesn't matter if it's from the Alt-F2 runner, the lock screen, etc.), I see an "Unused" entry for each VT that has an X session ...
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1answer
2k views

I want to install Nvidia module 352.30 on ubuntu 14.04 (2 video cards intel and nvidia)

This is my hardware Using: nvidia-installer ncurses user interface WARNING: You do not appear to have an NVIDIA GPU supported by the 352.30 NVIDIA Linux graphics driver installed in this system. ...