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

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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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0answers
5 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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votes
0answers
13 views

How activate manual login in Deepin?

How can I activate manual login in Deepin? I've tried by changing greete-show-manual-login = true in /etc/lightdm/lightdm.conf but that didn't work.
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1answer
155 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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0answers
18 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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0answers
15 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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0answers
41 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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0answers
18 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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0answers
21 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. ...
5
votes
1answer
52 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 ...
0
votes
1answer
44 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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votes
1answer
1k views

Black screen after 15.10 upgrade, not even getting into tty1 anymore

I'm using Ubuntu 15.04 and upgraded to 15.10 tonight. After restarting I'm getting a black screen with a flickering message from my window manager. First I was able to get into tty1, so I ...
37
votes
7answers
138k views

How to change the LightDM theme/greeter?

I downloaded a couple greeters for LightDM, but I have not figured out how to enable them. Is there a way to switch greeter, either by graphical or command-line method?. I do not intend to change ...
0
votes
0answers
23 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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0answers
18 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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0answers
52 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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0answers
219 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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2answers
253 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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0answers
146 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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9answers
112k views

How do I enable auto-login in LightDM?

I want user foo to auto-login using LightDM (which has been used by Ubuntu since version 11.10). How would I do that?
76
votes
16answers
45k views

How do I disable the drum beat sound on the login screen?

I would have expected System ▸ Administration ▸ Login Screen ▸ Play login sound to control this, but unchecking it does not prevent the drum beat sound from playing.
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5answers
2k views

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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1answer
150 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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0answers
16 views
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0answers
16 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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vote
1answer
43 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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2answers
123 views

Why is my mouse invisible on ubuntu 14.04?

I'm running a clean installation of 64-bit Ubuntu 14.04 with dual monitors. When I start up the mouse is invisible on the login screen and after logging in. Relogging in does not work. I've googled ...
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1answer
773 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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votes
1answer
26 views

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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votes
1answer
9k views

No desktop appears after logging in using XDMCP

I just installed a test machine with Ubuntu LTS 14.04 and I went to configure the XDMCP access and found that the file /etc/lightdm/lightdm.conf is not there anymore. In Google I found that now it is ...
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2answers
2k views

Ubuntu hangs on Starting light display manager on bootup

I've been going at this for about 10 hours, and I can't find a solution to this problem. I recently updated to 15.10, and now when I boot up, It gets stuck on "Starting light display manager" part ...
2
votes
1answer
3k views

Unable to reinstall unity-2d on Ubuntu 14.04 desktop LTS?

It is wiered that I'm not able to reinstall unity-2d on my system. I removed it as it was not ready to go into the 2D mode. I have XRDP install for which I need Unity-2D. after removing the unity-2d ...
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0answers
9 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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3answers
5k views

How to get Pantheon Greeter on Ubuntu 14.04 instead of Unity Greeter

I'm running Ubuntu 14.04, how can I replace the lockscreen with the one on Elementary Luna (Pantheon-Greeter). Thank You!! Edit: Can anyone do it and confirm it works completely?
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0answers
25 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 ...
4
votes
1answer
4k views

How to disable shutdown/reboot from lightdm in 14.04?

In 12.04 it was possible to prevent system shutdown or reboot from the login screen by adding the following restrictions in /etc/polkit-1/localauthority/50-local.d (adapted from here): [Disable ...
4
votes
2answers
7k views

Intel Haswell strange graphics and boot issue

I build a new system with a Core i5-4570S CPU and I use the internal graphics card. I can Install Ubuntu 13.04 without problem and everything seems to work fine, but during boot and when I turn the ...
4
votes
2answers
7k views

How to fix Ubuntu 14.04 LTS login screen hangs with “logging in…”

Anyone have suggestions for this: I upgraded my Ubuntu system to 14.04, and the upgrade failed miserably. I was forced to restart the system in order to get to a login. After following several ...
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vote
4answers
151 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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votes
5answers
5k views

xhost setting at boot

I am able to set xhost at boot in Fedora by editing /etc/gdm/Init/Default and for example add: /usr/bin/xhost +local: How can similar be done in Ubuntu? I want that the /usr/bin/xhost +local: ...
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votes
0answers
39 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. ...
5
votes
4answers
17k views

(13.04) lightdm crashing - black screen flashing cursor

I am using the 13.04 x64 release of Ubuntu on my PC and at least it works so far as it should. But suddenly the lightdm crashes during boot and even if I try to start it manually from terminal after ...
135
votes
12answers
109k views

How do I disable the guest session?

How do I disable the guest session in Ubuntu 11.10 or higher? I don't want people to be able to use my computer without using a password to log in!
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votes
0answers
26 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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votes
0answers
15 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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vote
2answers
4k views

MDM doesn't automatically start

I just successfully installed mdm on 13.04 with this guide, replacing but not uninstalling lightdm: How can I replace LightDM with "MDM"?. However, when I first rebooted, I just got a blank ...
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votes
1answer
2k views

LightDM & SDDM fight on greeter screen

I had installed Kubuntu 15.04 sometime ago. I upgraded to 15.10, things were going fine till I added ubuntu-desktop to use Unity DE. When booting with systemd, on startup or login, I get black or ...
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votes
2answers
5k views

vnc using lightdm and x11vnc disconnects immediately after valid login

starting with a precise 64-bit server install, I configured the following; sudo apt-get install lightdm x11vnc sudo dpkg-reconfigure lightdm in /etc/init/x11vnc.conf, I placed; start on ...
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1answer
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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vote
2answers
6k views

Login as domain user Ubuntu 14.04

I have installed PowerBroker aka Likewise-open on my Ubuntu 14.04 desktop. I successfully added the desktop to the domain but I am unable to login as a domain user at login screen. I found some ...