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

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Xubuntu and Ubuntu's display managers coexisting

I'm running Ubuntu 14.04. I installed Xfce via the 'xubuntu-desktop' package to try it out. After a couple days I decided to get back to Unity so I removed it and several other packages it came with. ...
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7 views

LightDM does not ask for login password

I have an auto-logged in non-sudo user called "screen". I have a passwordless sudo but login-protected user called "support". I'm pretty sure this was working fine before, somehow maybe the latest ...
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When I turn my monitor on after it has been off, it does not display anything

I am running Xubuntu 14.10 on a desktop and use LightDM. As I said in the title after I turn off my monitor (with the computer already on) and then turn it back on again there is no input from my ...
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27 views

14.04 : Cinnamon goes straight to Fallback on Nvidia card after reboot

A couple of days ago I did an update on my machine. apt-get update After the update proceeded I rebooted the machine and tried to log into cinnamon. Straight after the login I get a message saying ...
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1answer
29 views

Xubuntu 12.04 desktop won't start

My computer started hanging on the greeter screen. I cannot start a local X session, but can still select rescue from GRUB and boot to a tty. In addition sshd and the xrdp server seem to work normally ...
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40 views

Kubuntu 14.10: after 12 Dec 2014 update X doesn't start

After the update X doesn't start complaining a not valid xorg.conf file As a workaround at every reboot I do: sudo rm /etc/X11/xorg.conf sudo startx I also opened this bug: ...
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26 views

Configure and run indicator-sysmonitor on boot at login prompt

I want to use indicator-sysmonitor to display an indicator showing that the network connection is up amongst other things immediately at boot on the lightdm login screen. I followed these steps to ...
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36 views

Can this error cause computer to reboot

There are 11 computers in my classroom. Yesterday they began to reboot randomly, all of them. I reinstalled Ubuntu and got this error everytime. Also, after reinstalling the rebooting continued. Can ...
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27 views

Lightdm has stopped working after Unwanted Nvidia display driver update

My computer has an Intel i3 processor and no other inbuilt GPU. However, the nvidia-* latest got installed on the computer during an update process. I used sudo apt-get remove nvidia-* to remove all ...
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9 views

How to change screen locker in KDE?

Recently I start using lightdm in pair with google authenticator for two-step authentication. All works fine, but default screen locker in KDE doesn't configured to use 2-step auth. So, I want to ...
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15 views

Weird mouse problem Linux Mint [closed]

I have linux mint 17.1 cinnamon 32bit. I installed these packages lxde lubuntu-core lubuntu-icon-theme lubuntu-restricted-extras.I selected lightdm as defaut. After that I log off and log in on ...
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1answer
22 views

Lightdm-gtk-greeter centre image

I use lightdm with lightdm-gtk-greeter. Is it possible to modify the greeter so the login screen will centre a wallpaper image that is smaller than the screen? The image I use gets stretched to fill ...
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1answer
16 views

Cannot change GTK and icon after changing LightDM greeter

I changed my LightDM greeter and suddenly I cannot change my gtk or icon theme. The dconf settings are there, but the system is not responding to changes, nor are the themes being used by all ...
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9 views

How to get Plasma Next option in Login

I installed Plasma Next on Kubuntu 14.10 and chose lightdm. Upon restart I'm not getting option to chose KDE Plasma Workspace/Unity/Plasma Next as my Desktop Environment. It directly enters Unity. ...
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19 views

Errors with Encryption Keyring and X when Booting in Ubuntu 14.04

I am running Ubuntu 14.04 and I know all of my passwords, but I'm having trouble logging in and error messages I've Googled have not led me to a solution. When I came home the desktop on my laptop ...
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46 views

lightdm multiple virtual terminals single seat

LightDM configuration semantics for multiple seats seem to have changed in Ubuntu 14.10. More, it seems there has always been ambiguity regarding whether multiple seats necessarily means separate ...
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1answer
27 views

Unity has disappeared from lightdm after updating gnome-shell

This morning I ran sudo apt-get upgrade and it prompted me to update gnome-shell. I never really use the gnome desktop environment, but I figured I might as well keep it up-to-date. After restarting ...
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62 views

nvidia and intel low-graphics mode error

I have ubuntu 14.04.1 64bit installed with intel and nvidia video cards . I'm was using xorg-edgers ppa to graphics drivers . Today i got an update for the drivers (i think it was the mesa drivers) . ...
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14 views

Restore notification style in Unity after installing Lubuntu

I installed kubuntu-desktop on my 14.10 ubuntu system. I managed to use update-alternative to set plymouth, and configured lightdm to get the default ubuntu look. The only problem that remain is that ...
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41 views

Could not write bytes : broken pipe Ubuntu 12.04

I am getting could not write bytes : broken pipe error when boot my laptop with Ubuntu 12.04. I know there are a ton of question similar to this here but none of which I tried solved my problem. I ...
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2answers
230 views

What to do when nothing seems to fix Ubuntu 14.10 stuck after log in?

So I run Ubuntu 14.10 on HP Pavilion g6, i5 and with Radeon HD6500. Yesterday Ubuntu crashed and since then I can't get anyfurther than the log in screen. Ubuntu simply stucks with only the background ...
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27 views

Wake from suspend, password field missing?

Ubuntu 14.04. Brightness & Lock settings are to turn off screen after 10 minutes and lock screen after 30 minutes. 50% of the time, when I wake my computer from suspend, the login field to enter ...
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1answer
23 views

X11 doesn't show windows edges, task bar nor anything

I've got a problem with X11 as when I turn on my computer, after the system has launched, I see only my desktop. I don't see the upper nor left bar. When I doubleclick a file on my desktop, a new ...
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1answer
40 views

How to change Ubuntu's default login screen for gnome ubuntu login screen?

I'm using 14.04 LTS with unity, but i removed the ubuntu desktop and installed the gnome ubuntu desktop instead, since unity has given me some errors... The thing is, im happy with gnome, but the ...
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59 views

Can't log in Ubuntu 14.04 LTS

I have been using Ubuntu 14.04 for a while. After a reboot this morning, I can't log in from the login screen. It flashes back to the login screen after the correct password is entered. I have ...
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36 views

rk3288 shows only splashscreen

I've installed ubuntu 14.04 from t-firefly to my rk3288 micro-computer. LightDM was there and I wanted to turn off its autostart and wrote "manual" to /etc/init.d/lightdm.override. After reboot I ...
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1answer
144 views

nVidia on Ubuntu 14.04 black login screen (not freeze)

Recently I installed STEAM on my Lenovo IdeaPad Y510p (core i7 + nVidia 755m) laptop running Ubuntu 14.04. I want to use nVidia for sessions when I play games and Intel for everything else. Therefore ...
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17 views

How do I set the background for lightdm-kde-greeter

I'm running Gnome desktop in 12.04 and installed the lightdm-kde-greeter. But I'm not sure how to change the background. Google has been no help, as all the suggestions say to go to the System ...
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20 views

Handling laptops with docking stations on XFCE

Anyone here running a setup in which they use a laptop + docking station setup for XFCE? At work, I plug/unplug from multi-monitor setups all the time and on unity I didnt have an issue (Radeon ...
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180 views

Ubuntu 14.10 Lightdm greeter resolution before login

There are various answers for changing the resolution of the Lightdm greeter before login by adding a root executable script to /etc/lightdm/lightdm.conf like this: [SeatDefaults] ...
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1answer
24 views

Strange Driver Corruption

So I have a "portable" install of 14.04 (I installed the full distro on a USB3 stick) and I'm having the strangest driver corruption/bug: As you can see, anything that uses it's own renderer (I ...
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50 views

How can I disable the lock session (not just in a specific gnome-session but for anyone who uses a certain machine)

I have several machines running ubuntu 14.04 LTS and there are a lot of users that log in and out of them (not local users). I wish to prevent any possibility of a user locking the screen in a ...
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54 views

How to remove the shutdown/restart/log out options from unity lockscreen?

I am using Ubuntu 14.10 on one computer and 14.04 on another.After hours and hours of searching around the internet,and having uninstalled lightdm(replaced with gdm),uninstalled xscreensaver(replaced ...
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27 views

Unrecognized keyboard layout after login

Two of my computers running Ubuntu randomly ignore the configured keyboard layout and fall back to qwerty. On one computer the configured layout is "Français" (French), on the other it is a bépo ...
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1answer
58 views

Problem with LightDm on Ubuntu 14.04 server

I have a fresh install of Ubuntu 14.04 server and installed lightDM (apt-get install lightdm) , started lightdm (start lightdm) a login screen appears with an error "Failed to start session" as ...
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128 views

snd_hda_intel fails to load and black screen after delay

two days ago I modprobe -r snd_hda_intel and modprobe it back. Today I got a black screen after a certain delay when loading lightdm. Here's the message in dmesg: [...] [ 47.313515] snd_hda_intel ...
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41 views

Higher Resolution Xrandr 1400x1050 Legacy GPU

Dear Ubuntu Community, recently I (re)found my 10 year old Sony Vaio laptop, a PCG-GRT916V to be exact. I immediately had the idea to put this old laptop to good use. Over the course of two weeks I ...
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1answer
73 views

lightdm-gtk-greeter keeps loping into login screen

Since I had problems with unity-greeter I had installed lightdm-gtk-greeter and it keeps looping into the login screen. 14.04 ubuntu I have several solutions: removing .Xauthority file, reinstalling ...
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21 views

Is it possible to display a splash screen when you disable the GUI

On my system I have removed lightdm. When the system starts it attempts to load up tty7 but since it does not have lightdm it is unable to boot up the GUI. So tty7 is the initially loaded which ...
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55 views

lightdm-gtk-greeter session loading fails

I have installed lightdm-gtk-greeter. This worked fine for a while. When I tried to shift to unity-greeter (which I could not) and so reverting back to gtk-greeter it presents the login screen, where ...
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30 views

Lightdm greeters?Where can I find some?

Is there a place where I could find a list of lightdm greeters and where I could download them? I would very much like to see some custom made greeters so I can fully customise my Ubuntu :) I know ...
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1answer
222 views

The system is running in low-graphics mode in Ubuntu 14.04 and /etc/lightdm/lightdm.conf missing

I always see the low-graphics mode error and have tried several solutions (links below) but in vain. [intel graphics, Ubuntu 14.04 running on a dual boot with windows7] How to fix "The system is ...
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1answer
57 views

Unity Greeter starts with a black output Screen

The unity greeter in my Ubuntu 14.04 laptop starts with a black output screen. When I say this I mean every error and output of the greeter is printed on the screen but the GUI is not visible. What I ...
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16 views

X server boots on unconnected screens rather than on internal laptop screen

I usually use my laptop with 2 external monitors (Lenovo T520 with docking station supporting 2 DVI outputs) which generally works fine. I always keep my internal screen turned off. Unfortunately ...
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19 views

Display is broken after login [duplicate]

I have big problem with settings $DISPLAY and xorg. After login to my account screen is black for few seconds and back to login page again. It is only for one account on my computer and I think I need ...
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2answers
71 views

Problems loging in gnome-session after upgrade to 14.04

I just upgraded from ubuntu 12.02 LTS to 14.04 LTS. After a miriad of problems which i was able to solve one by one, the upgrade was successful. It was however impossible to log in the default gnome ...
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1answer
126 views

Where is “session sufficient pam_lsass.so” and the “/usr/share/lightdm/lightdm.conf.d/50-unity-greeter.conf”

I am new in Ubuntu, Ubuntu Server 14.04 LTS. I am setting up a Samba File Server and join it to our domain. I configured some of the configuration, but in the step 6 of this guide, I was unable to ...
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118 views

Auto-detect new monitors/TVs and resize screen resolution in Ubuntu 14.04 Server

I have an Ubuntu Server 14.04 LTS installed on Zotac ZBOX CI320 Nano which has two video sockets: HDMI and Display Port. The PC hosts my website, download torrents, runs XBMC media center software ...
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1answer
104 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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21 views

exlude users from display manager [duplicate]

I just did a fresh installation of Ubuntu 14.04. To not break anything, I created the default user during install, but I neither need nor want it. I added my usual users (UIDs > 10000), which work ...