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

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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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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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22 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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27 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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19 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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7 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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12 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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16 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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28 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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14 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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27 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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50 views

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

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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25 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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24 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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23 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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13 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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51 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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39 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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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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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
642 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. ...
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40 views

Cannot autologin on Ubuntu 14.04 after updates

I just do some updates and now I cannot autologin into my Ubuntu 14.04. Previously, I can autologin, sometimes I cannot. I guess, this is caused by something with systemd. Here my auth.log when ...
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LigthDM Animations

is there a way to port lightdm lock/unlock fade animation on other greeters? I'm thinking about making a port of the animations on pantheon-greeter. Thanks
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14 views

Smart lock like on Android?

Is it possible to configure either LightDM or GDM to automatically log in when my laptop is connected to a certain WiFi? Or even better, to check my location regardless of what WiFi I use?
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36 views

Themes & Icons not loading after logging in quickly

So this is a funny one, I guess. What am I running? Ubuntu 15.04 / Kernel 3.19 On what am I running? ASUS Zenbook ux303ln As the title says, the theme and icon style, specified in the unity tweak ...
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180 views

Problem on boot: Starting Version 219

After installing Ubuntu 15.04 when I start the system appears the message, which carries with it takes longer to boot. If anyone can help would be grateful. complement: Already tested the command: ...
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48 views

LXDM and Ubuntu 15.04

Currently, the lightdm is burning up too much CPU resource on my computer and from the searches I've done, it's a heavy display manager. Example, just having wunderlist web page open in firefox, the ...
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46 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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40 views

Login loop on ubuntu 14.04. Other user can log in. Checked Xauthority, and ~/.profile.

When logging in to ubuntu 14.04 I am encountering a login loop on my main account. Upon entering my password, the login box disappears to leave the wallpaper displaying alone. Then after maybe 1-2 ...
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13 views

How can I set up Ubuntu to execute a command as root when a user without root privileger logs in? [duplicate]

I currently have Ubuntu (15.04) set up to boot to tty, and want to make it so that sudo service lightdm start is executed whenever a specific user (without root privileges) logs in. Is there a way to ...
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23 views

After installing QtCreator, lightdm not turn on xubuntu 14.02

I just simply wrote sudo apt-get install qtcreator in terminal and saw how he removing xserver and some graphical packages in installation process. At the end, he install them again, but after reboot, ...
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69 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?
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48 views

The system is running in low-graphics mode?

First off, I've searched and tried every method I could find the last ~6 hours. Nvidia 750 TI graphics card. Running in VMWare. The system ran fine for a few days and out of nowhere I received a ...
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1answer
34 views

Laptop does not like external monitor

Recently, I installed Ubuntu 15.04 on my machine and got everything running about as it should, except for one thing: my external monitor can not be set as default. Every time I plug in my external ...
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138 views

Minimal Gnome install on Ubuntu Mini

I am trying to get a very minimal Gnome installation on 64bit Ubuntu mini. I don't want the bloatware of a regular install of Gnome. I tried this: sudo apt-get install lightdm gnome-terminal synaptic, ...
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Window manager (?) or anything similar is broken [duplicate]

When I booted today, I had a normal login screen but as soon as I logged into my account (admin), the mess began. My system: Ubuntu 15.04 with Unity, kernel 3.19.0-22 My symptoms: No panel No ...
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135 views

Ubuntu 14.04.2 login screen loop back

I have a login screen loop back problem, when I punch my password I get back to the login screen again. I have tried to login with LightDM CI screen by Ctrl+Alt+F3 but there when i put in the username ...
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90 views

How to configure ubuntu 14.04 to run Icewm as default desktop display Manager

How to configure ubuntu 14.04 to run Icewm as default desktop display Manager. which files to Configure to do this
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19 views

lightdm-webkit-greeter issue

I am using Gnome Ubuntu 14.04 LTS. I used this command; sudo apt-get install lightdm lightdm-webkit-greeter xserver-xephyr I install LightDM and LightDM-webkit-greeter and bevel (lightdm theme), I ...
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88 views

Gdm with nvidia-331 and nvidia-prime causes a black screen at boot

I'm on an Asus UX51vz laptop, which has RAID0 SSD's and an nvidia 650M graphics card. I installed lubuntu instead of ubuntu-gnome because lubuntu still has a RAID0 compatible alternate install ISO. ...
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24 views

side effect between isc-dhcp-client, network speed and lightdm

I have 300 computers on running on 14.04 64bits Ubuntu, i use isc-dhcp-client to get ip and name from my dhcp server. I encounter the classic problem with lightdm "your system is running in ...
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1answer
156 views

Install nvidia geforce gt 845m driver on ubuntu 14.04.02 lts

I am trying to install the driver on my asus n551jq, under ubuntu 14.04.02 lts. My steps are: sudo add-apt-repository ppa:xorg-edgers/ppa sudo apt-get update sudo apt-get install nvidia-337 ...
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178 views

how to change ubuntu 15.04 lightdm greeter wallpaper size?

i was wondering if i can change the size of the background i have selected in lightdm.conf after installing lightdm-gtk-greeter sudo apt-get install lightdm-gtk-greeter then editing the ...
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21 views

Can't auto-login with Lubuntu

I have tried to make autologin work with Lubuntu but for some reason the thing is not working. Just to be cautious I used both procedures described here (for LXDM and LightDM), but neither work. I am ...
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2answers
63 views

Drop to a console after boot, and then start the GUI when required

I am running Ubuntu 14.04 with Gnome as the Desktop Environment. When I boot, I want it to be quick, and drop into a shell. I'll enter my username and password, and if I require, I will start the ...
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51 views

lightdm doesn't show up

whenever I reboot the lightdm display the mouse cursor but it doesn't show the login form. However if I type my password I login into my account. This hapens since I've moved to kubuntu 15.04 (upgrade ...
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49 views

Stuck at loading screen after removing LightDM

I removed unity and installed cinnamon on my Ubuntu 14.04 LTS, everything was working fine. I recently removed LightDM in favour to the lock screen of cinnamon using this method How to uninstall ...
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31 views

Everything except GUI is black

Since I installed Ubuntu 14.04 on my laptop, I have many problems on it (that I don't have on Debian 8) Indeed, when I switch to TTY with CTRL + ALT + F(1-6), I get a black screen, same problem when ...
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31 views

Messed up Lightdm , Help

I was playing with lightdm customization and i think i have completely messed it up. I added a few themes and tried switching themes by editing the webkit conf file and after a restart lightdm won't ...
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29 views

Logging in to Ubuntu without a Display manager

So I want to login to my system without a display manager(lightDM). How would I go about doing this? or Could removing lightDM break the system? My current WM is i3. so i3 specific instructions would ...