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

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fixing things from a LiveBoot session

I switched from LightDM to something else when I was messing with my system late at night. When I rebooted, the screen went black. I'm currently booted from Bhodi Linux on a flash drive, and am ...
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67 views

Scripting dconf changes

I've written a simple script for our Ubuntu machines at college which sets some dconf overrides to set the theme, background etc. However I cannot seem to get it to correctly set the login screen ...
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35 views

Not asking for password in GUI for login even when there is a password set in Ubuntu 14.04

I have a user which has no sudo rights. I have set the password for the user using cli. But when I logout and try to login again, the user is not asked for a passord and logs in as soon as the ...
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1answer
419 views

x11vnc and lightdm on headless 16.04

I need to access a remote xenial machine with x11vnc sudo apt-get install lightdm x11vnc installed the necessary parts. Then, I created a password with sudo x11vnc -storepasswd yourVNCpasswordHERE /...
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26 views

Can't find session 'default' for desktop log in

I have a puzzling issue on a newly installed 14.04.4 LTS. I configured it for nis and it works when I ssh into the machine. But if a user tries to log in on the desktop it fails with the "Can't start ...
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24 views

How can i set xscreensaver to work directly from lightdm login screen?

Trying here to enable xscreensaver to work directly from lightdm login screen. It's currently work only from a logged session, when it is on login screen when time pass, it blanks out the screen, ...
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1answer
112 views

Login Loop for Guest Account only on 16.04

I have some 40 Dell Latitude E6410s I maintain in my classroom for student use. I have successfully setup and used special 'guest' accounts so the directories are wiped between uses. This scheme ...
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45 views

Using lightdm webkit greeter in 14.04

All guides indicate I need to change a setting in /etc/lightdm/lightdm.conf, and that's how I did it last time, but there seems to have been some changes since that was written. lightdm.conf doesn't ...
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219 views

Cannot switch to Gnome on 16.04

I just installed Ubuntu 16.04. I have it already on my laptop with Gnome 3.20 working. My desktop pc has an i7 4790 and AMD HD 7950 installed the Gnome 3.20 and rebooted. Now I have the icon to switch ...
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47 views

Two graphics drivers at the same time?

I have an Intel integrated graphics card "Intel cooperation skylake integrated graphics (rev 06)" and an Nvidia GTX 960m on my laptop. I wanted to use the skylake integrated graphics card for my ...
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43 views

Can not login .XAuthority seems broken

I know that this is a common error and I have read many threads in this regard. I get to the logon screen and type in my pw and it hangs for 20 seconds or so and then displays the log screen again. ...
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44 views

Login problem after Hibernate with Dell E7440

Yesterday I installed Xubuntu 16.04. It uses the lightdm display manager to log in. This works. The issue: I use a Dell Latitude E7440 with Docking station. Most of the time, the screen of the ...
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1answer
109 views

Ubuntu 14.04 login loop Unity terminated with status 1

I have ubuntu 14.04 and am stuck in a login loop problem despite trying the common answers to the multitude of questions on the site ,none have worked. I can't figure out what's wrong and would be ...
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130 views

Ubuntu 15.10 to 16.04 and lightdm display-setup-script: can't connect x server

After upgrading from 15.10 to 16.04 my lightdm.conf command has caused black screen on boot, never reaching the login screen: display-setup-script=xrandr --output DP2 --auto --primary --output HDMI3 -...
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1answer
148 views

Takes a very long time to log in to gnome 3.18.4 in Ubuntu 16.04

I just installed Ubuntu 16.04 via update from 14.04. I'm using gnome-shell 3.18.4. When I want to log to my gnome shell session the login is very slow, it takes more than 1 minute where the the only ...
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362 views

Ubuntu 16.04 Xorg / lightdm crashes on boot with GTX 970

When I boot my Ubuntu 16.04 liveUSB on my desktop (GTX 970, i5 4440) I get to LightDM and then everything falls apart. My mouse freezes and my main monitor (connected to the GTX 970) starts blinking ...
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846 views

Ubuntu 16 Stuck in Login Loop after Installing Nvidia 364 Drivers

This didn't start out as a problem with the login loop. I was attempting a clean install of Ubuntu 16 and using the new feature that allows it to detect proprietary drivers for me. I started off ...
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1answer
602 views

Ubuntu 16.04 stuck at LightDM login screen

So I just installed Ubuntu 16.04 yesterday. Today I wanted to login to the computer and suddenly it doesn't log me in anymore. I can enter my password, but when I hit return to log in the screen goes ...
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18 views

How to make user automatically log in in Lubuntu 16.04? [duplicate]

How do I make a user automatically log in in Lubuntu 16.04?
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23 views

shutdown or reboot after entering wrong password x times

My laptop is configured with a bios password to unlock the encrypted ssd. Most times I don't shut it down and use just suspend/resume - this of course leaves the ssd accessible. To increase security ...
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1answer
310 views

login loop after upgrade to 16.04

I encountered a login loop after updating xenial beta to the latest updates. I tried a lot of things: xauthority or /tmp privileges change Reinstalling nvidia drivers, removing them. reinstalling ...
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3answers
516 views

16.04: lightdm(lockscreen) can't connect to wifi. (1) Insufficient privileges

After upgrading to 16.04 (clean install) from 14.04, (so not really upgrading, but you get the point) I notice that lightdm with unity-greeter can't connect to WiFi with network-manager. I get the ...
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4k views

How can I set up Ubuntu Server 16.04 to load a GUI on demand?

I would like my server to boot to command line by default but load a GUI when I need one. I have a virtual machine set up just for testing and I got the standard UNITY GUI installed on it no problem. ...
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Can't get nVidia drivers working with 16.04, logs out right after login

I have installed Ubuntu 16.04 beta 2 on Monday, Apr 18th. When I try to install nvidia-current, nvidia-361 or the version that jockey installs, either lightdm fails to start entirely or I can't get ...
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16 views

Ubuntu custom theme doesn't work on boot

My ubuntu custom theme doesn't want to load until i restart the lightdm service. That's the only solution that has worked so far. If i don't restart the service, i get the default system theme. How ...
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32 views

Is it ok to kill lightdm and related processes in lubuntu to reduce load as I use terminal? [duplicate]

I'm running Lubuntu 14 in my old PC. I have connected it to my router via ethernet and access it with putty, it has no dedicated monitor. I think the GUI is not needed any more, can I kill the ...
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4answers
174 views

How to boot to a terminal from a black screen and flashing cursor after updating the NVIDA graphics driver

I'm running Ubuntu 14.04 LTS and updated my graphics card to Nvidia Quadro K4200 in order to get stereo capability. It worked with the recommended Ubuntu driver (nvidia-352), although I struggled to ...
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48 views

Can't login to my account with neither gdm nor lightdm

What I've tried: I am able to login as myself via tty I can login as guest (graphical) Installing gdm and using that instead of lightdm (see title) ~/.Xauthority is empty and owned by me. .xsession-...
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28 views

14.04 boots into black screen even after a fresh install

So, this started after I took out the hard drive (after turning it off, and unplugging the power source). It would just boot to a black screen. It would show the purple ubuntu screen, but no log in ...
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19 views

port 6000 X11 opened out of nowhere, cant close it

Just noticed that my port 6000 is open. netstat -anup output: Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:6000 ...
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67 views

Span Wallpaper Across Displays in Lockscreen

In the Appearance tool, we have the option to span a wallpaper across multiple displays. On the Desktop it works fine: However, on the lock screen I see the same image repeated three times: ...
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Error while installing lightdm-webkit-greeter

I can't install the package lightdm-webkit-greeter on Ubuntu 14.04 sudo apt-get install lightdm-webkit-greeter Reading package lists... Done Building dependency tree Reading state information.....
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GUI doesn't have escalated permissions, Ubuntu 14.04 lightdm

Relatively new user here. So I am having some permission issues with the desktop. The sysadmin before me set up Ubuntu 12.04 on the other machines, and it seems to work OK. I set a new machine up ...
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23 views

Xubuntu lightdm screen fliks

So on Xubuntu I have a lightdm by default. When system is booted or one is logging out and lightdm starts it blinks after 2-4 seconds. If I do logout form XFCE4 session for a mentioned period I can ...
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57 views

ubuntu gets stuck in a login loop

My Ubuntu is stuck in a login loop when trying to enter my desktop. When I login, the screen gets black and soon after that the login screen comes back. I referred Ubuntu gets stuck in a login loop, ...
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1answer
82 views

how to force DPI settings in Xenial?

Is it possible at all to force a specific DPI settings in Ubuntu Xenial? Recipes mentioned in Can I pass a dpi flag to lightdm to set the proper DPI for X? don't work anymore: I can successfully ...
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2answers
24 views

Can't install NVIDIA driver even after stoping lightdm

I want to install NVIDIA-Linux-x86_64-346.59.run using command from tty1 sudo su sudo service lightdm stop that generate output Stop : Unknown Instance: then continue with chmod +x NVIDIA-...
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46 views

Password not working on “Switch User” only

I have Ubuntu 15.10 x64, which was upgraded in a long series of upgrades going back to 9.04. Over time, many things (including most of the hardware by now) have changed. What has not changed, however (...
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1answer
76 views

Show all user accounts on greeter screen

Is there a way to have Kubuntu 15.10 default to showing all users known to the system on the login screen (greeter)? If I have users Alf, Bill, Chris, Daisy and Ella, and Daisy was the last user ...
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77 views

Change wallpaper LXDE Lubuntu 14.04

I am trying to setup my own ISO image based on 14.04 with some extra tools. Because of that, I was wondering If there is any way to change the wallpaper of the desktop. I tried to do it by editing /...
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1answer
97 views

Change lightdm-gtk-greeter background?

I've been Googling like a maniac trying to find an answer, so I've now decided to ask here. How do I go about changing the background of the login screen? (lightdm-gtk-greeter). It currently uses ...
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61 views

Ubuntu 15.10 Multiseat LightDM Login loop

I have a system using an Nvidia and Intel graphics adapters. I am using the graphics-drivers/ppa. After configuring multiseat, both seats appear on the correct monitors. The lightDM login works ...
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1answer
86 views

how to change the lightdm gtk session icon

Quick question - I'm using lightdm-gtk-greeter in both 15.10 and 16.04 In the panel the budgie-desktop session icon is appearing as a spanner (wrench) icon. Any ideas how I can change this from this ...
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27 views

Strange messages after running `sudo service lightdm stop`

I'm trying to install CUDA and the NVIDIA drivers on my Ubuntu 14.04 laptop. Following these instructions, I entered CTRL+ALT+F1, and then sudo service lightdm stop, in order to disable the X server. ...
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41 views

is plasma 5 supposed to work with lightdm?

I just upgraded a Ubuntu 14.04 install to the 16.04 beta and thought I'd try out Plasma 5 now that it's available to me. I'm not running Kubuntu, but I figured an apt-get install plasma-desktop --...
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49 views

Restore lightdm greeter dynamic background after installing xfce4 on Ubuntu 15.10

I recently installed xfce4 on Ubuntu 15.10. I did it in order to remote login using x2go. It is working perfectly. After installing xfce4, lightdm is displaying the blue mouse background that comes ...
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41 views

Black screen slides down and kills lightdm in Ubuntu 14.04 w/ Nvidia card & Brightness Controller

Nearly every other day my monitors black out from the top of the screen to the bottom leaving me with to black screen and no cursor. The black screen takes about 4 seconds to slide from the top to the ...
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32 views

Login loop after killings process

I'm having an annoying issue. I terminated some processes from another users, which were holding me back changing the user's home folder location. I killed 2 processes (I do not remember the actual ...
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1answer
33 views

session-cleanup-script not called

Because of this Bug I needed to edit the session-cleanup-script config in /etc/lightdm/lightdm.conf. As the same post suggests, adding session-cleanup-script=/etc/lightdm/lightdm.conf.d/cleanup.sh is ...
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41 views

greeting screen disappearing and cannot access tty

When I start my Laptop I see the lightdm greeting screen, however (regardless of what I do) my screen goes black after some seconds leaving my only with the mouse pointer. I can still interact with ...