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

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What is the relationship between Unity, Gnome, Gnome 3, Compiz, Metacity, and LightDM?

I am learning about Graphical User Interfaces in Ubuntu and constantly come across different terms, which cause a lot of confusion for me. I have tried reading easy-to-understand tutorials about the ...
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1answer
3k views

Stuck at boot screen 12.04

I tried to install a lightdm greeter theme but after dissapointing results I chose to try gdm instead, which prety much reconfigured my desktop theme, so I chose to remove them both. Since the last ...
4
votes
1answer
4k views

How do I install fglrx on an AMD Kaveri machine?

I have recently built a Kaveri machine, but I'm having trouble getting the fglrx drivers up and running. I can install them, but the LightDM screen will simply be black. The machine has an AMD ...
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1answer
634 views

My Account not visible in User Accounts

I am currently set to automatically log into this machine and I would like to change that. However, when I go to User Accounts, I am no longer listed. lightdm/users.conf file is as such: ...
11
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5answers
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rotated monitor. login screen needs rotation

I rotated my screen, an once I login, it works fine. but, the greeter (login) screen hasn't got the message that things are rotated 90 degrees. How can i change the rotation of the login screen? ...
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2answers
4k views

Which command locks screen with lightDM?

I used to lock screen with this command, but it stopped working recently, probably after update. I'm running VERSION="13.10, Saucy Salamander". How can I restore this function? $ gdmflexiserver ...
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2answers
102 views

unable to manual login after upgrading Ubuntu

I have upgraded my Ubuntu from 13.04 to 13.10. And now after the system restart; there are only two options appears on screen as guest session and remote login. How can I get back the manual login ...
0
votes
1answer
811 views

ubuntu 12.04 graphic error on boot after update from 10.04

After an update to ubuntu 12.04 from 10.04, I have a strange problem: in grub menu if I select ubuntu kernel 3.2.0-58-generic the graphical interface just hangs there, I get this black screen with a ...
2
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0answers
423 views

Logging out from Ubuntu takes too long

When I first had only Unity as a desktop manager, I didn't need to log out so I'm not sure if this issue has been around before. I'm say so because It's important to know that I currently have Xfce ...
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1answer
490 views

Can not login to Ubuntu 13.10 after reboot

For some reason on my System76 Bonobo, after a reboot, i try to login and I get a blinking cursor in the top left for a few seconds, than right back to the login screen. It SEEMS like lightdm crashes. ...
0
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1answer
102 views

How to start X without logging in console?

My filesystem is based on Ubuntu server and I installed xorg and openbox on it. I've made it auto-login and auto startx, but when boot and shutdown, I can always see the root@arm:# or something ...
0
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2answers
157 views

No unity after login to main user account [duplicate]

Yesterday my computer stayed open all night and then when battery was empty it turned off. Its normal for my computer. But when at morning I turned it on, there wasn't login screen. It crashed ...
0
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1answer
153 views

Login to command line [duplicate]

It's possible to perform a login ( with lightdm or anything else ) and enter directly in command line mode without enabling any GUI for the user ?
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1answer
4k views

lightdm is not starting

I get a blank screen on boot :( $ sudo tail /var/log/lightdm/lightdm.log [+0.02s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager [+0.02s] DEBUG: Registered seat module xlocal [+0.02s] DEBUG: ...
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1answer
95 views

All display managers boot into Gnome Classic (No effects)

I've tried both gdm and lightgdm but no matter what I do, I get logged in to Gnome Classic (No Effects). The terminal's transparency is a nuisance here and I completely do not want to work on anything ...
10
votes
2answers
3k views

How to control LightDM power saving preferences?

I want lightdm to enter power save after a specific period of time. If I'm logged in then my screen will time out as per the user settings, however when no one is logged in the screen will stay on ...
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0answers
134 views

Service account shows up on login screen

I've manually created a service user account on my machine, and I'm surprised to see it on the Unity login screen. I searched this site and I've seen people had problems with this, but in those cases, ...
1
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1answer
473 views

How do I fix Unity from freezing and artifacts on my screen when I'm charging my laptop?

I woke up this morning to find my computer frozen and my graphics were not rendering correctly either. I had to press Ctrl + Alt + F1 to regain control of the system. At first I thought it was my ...
1
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2answers
327 views

Forgot to install login screen after removing unity and installing kubuntu-desktop

First I must admit that I did something really stupid. I de-installed unity from my ubuntu 12.04 LTS to install kubuntu-desktop as I wanted to try out a different desktop environment. The problem is ...
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1answer
74 views

Problem with starting GUI mode in Ubuntu Server

Well I have installed the Server version of Ubuntu 12.04. Since I was only getting terminal, I installed the desktop package and executed these commands in the following order: sudo apt-get install ...
0
votes
1answer
332 views

Xubuntu crashes before login screen

Xubuntu 13.10 Booted up this morning and Xubuntu does not get to the login screen. I am seeing the white half circle spinning and then it drops to a black screen. I can however start tty1-6 but ...
0
votes
1answer
629 views

Ubuntu 12.04, 13.04: Cannot login to account returns to login screen [duplicate]

Question In Ubuntu 12.04 and 13.04 (and probably 13.10) I made some changes to my graphics settings. After rebooting when I attempt to login to my account the screen flashes black the bounces me back ...
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4answers
2k views

Unity-greeter black screen on 13.10

I've recently installed ubuntu 13.10 64bit on a desktop (UEFI mode). After the plymouth splash i get a black screen. After some experiments I found a temporary solution: switch back to tty1 and ...
1
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1answer
51 views

Why can't i log in on Unity? [duplicate]

I'm using Ubuntu 13.04 with Unity. Whenever I log in into my computer, the screen becomes black, then purple (that dark ubuntu-color) and that switches a few times. Between that the screen shortly ...
0
votes
1answer
483 views

Reboot and shutdown from MATE

When I start MATE 1.6.0 from LightDM in Ubuntu 13.10, I can't reboot or shut down the system or shut it down because the buttons to do that don't appear. The only thing I can do is terminate the ...
0
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1answer
1k views

teamviewerd not starting with lightdm on 13.10

I've installed the upstart-job for Teamviewer 9. According to the config it should start when dbus and lightdm is running, see: start on ( (started dbus or ...
3
votes
2answers
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How to return the login screen of the original unity ubuntu?

I've installed the LightDM GTK+ Greeter 1.7.0 as below sudo add-apt-repository ppa:lightdm-gtk-greeter-team/stable sudo apt-get update sudo apt-get install lightdm-gtk-greeter ...
2
votes
2answers
2k views

Default login screen missing, how to revert?

I installed some KDE stuff by mistake. After removing it, my login screen now is quite different; has a white background and the user icons+input appear in the centre. [note that I have tried sudo ...
2
votes
1answer
439 views

Ubuntu 12.04 boots to login screen but (I think) X.org crashes on login. Help Appreciated! [duplicate]

I've been running Ubuntu 12.04 since it's debut in 2012 without a single problem. Today I just ran sudo apt-key update && sudo apt-get update and then I rebooted my computer. After rebooting ...
0
votes
1answer
2k views

lightdm and startx fail to start graphics mode; traces of Nvidia driver are involved

My Ubuntu 12.04 system boots to a text mode login prompt (virtual console #1) since I upgraded the kernel (using Ubuntu's automatic upgrade system). I was using an Nvidia driver that worked well until ...
2
votes
3answers
3k views

How to run greeter/login script with lightdm

Is there a workaround to run a lightdm script? The one in the docs doesn't work. Anything placed there will prevent X from working. The script I would like to use is my KVM utility synergy. I ...
0
votes
1answer
183 views

How to enable unity-greeter in Ubuntu 12.04?

If you want a different session for the default, you can modify this option. Manually add the following line in the [SeatDefaults] section of (sudo gedit) /etc/lightdm/lightdm.conf: [SeatDefaults] ...
2
votes
1answer
534 views

Another black screen after Nvidia driver installing

I'm quite new on Ubuntu, and this is my firt post here on the forum, even if I read it a lot. I've installed the lastest Nvidia driver for my Graphic Card (a .run file), I've followed Nvidia ...
0
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1answer
95 views

Login credentials stored somewhere?

What happens to login credentials after I authenticate with lightdm? Is there are process that stores them? Would this be something that PAM caches somewhere? Would lightdm hang on to them? The ...
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0answers
83 views

Login errors in .bashrc in 13.04

I just upgraded to 13.04, and suddenly I get xsession errors in my .bashrc on login. There is nothing wrong with the .bashrc file--I can source it from a terminal login, and after I get into the ...
0
votes
1answer
666 views

Ubuntu vnc4server no working session only terminal

So I've trid to get xrdp working on Ubutnu Server 13.10 which meant a lot of messing around with lightdm and gdm. So after giving up on xrdp i switched to vnc. I installed vnc4server purged lightdm(as ...
1
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1answer
687 views

Edit the Unity-Greeter theme

I am trying to get rid of some of the indicator icons on the Lightdm login screen (or maybe just get rid of everything). No luck so far. The file I am editing is @ ...
0
votes
1answer
2k views

Can't use startx with lxde?

I use Lubuntu 13.10 and start default with "text". When i need to use GUI, startx didn't work, but "service lightdm start" is worked. How to use startx with LXDE? Thank You!
0
votes
1answer
292 views

black screen on booting

I've been working with Ubuntu on my lenovo for awhile. after heavy using I started to face the black screen when I reboot. Cursor at the top left blinking with the sound of rebooting. I still see the ...
3
votes
2answers
6k views

Type password into login screen, hit enter - nothing happens

I first install Ubuntu 13.10 a few weeks ago and its been going great. I'm still pretty new to Linux, so I haven't been doing a whole lot. The past couple days I've tried installing LAMP, then ...
0
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4answers
7k views

How to uninstall lightdm?

I removed Unity from my computer. But still lightdm is showing when I typed sudo dpkg-reconfigure lightdm. I want to remove it. What can I do?
1
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1answer
3k views

How to reconfigure lightdm? [duplicate]

Last night I installed KDE. But then however my Desktop manager changed into KDM. How can I go back to my default Desktop manager lightdm??
0
votes
1answer
306 views

Cinnamon won't run on *Ubuntu 13.10

I tried to install cinnamon on my Kubuntu 13.10, just upgraded from 13.04 without problems. There is this ppa: ppa:gwendal-lebihan-dev/cinnamon-stable Also tried to use the non-ppa-versions (those ...
0
votes
1answer
2k views

NoMachine NX Client V4 and Lightdm

I am trying to connect from an Ubuntu 13.10 laptop with Nomachine nx V4 to an Ubuntu 12.04 system with Nomachine nx V3.5 I can successfully connect to the machine, but if I try to connect to the ...
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0answers
179 views

After changes plymouth theme ubuntu dont boot

After I changed plymouth theme i cant boot up my pc. plymout show but after few second screen go off. I tried pres CTRL + ALT + 1 and CTRL + ALT + 7 but after that screen turn on but i can see only ...
0
votes
2answers
54 views

How to prevent login directly to my defaul desktop?

I installed lxde on my OS. But when I start up my os it doesn't take me to the login screen it just boots to the default DE right away. How do I make it so that I can boot into LXDE right away? Or how ...
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0answers
314 views

How do I fix corrupt background in LightDM?

After a fresh installation of Lubuntu 13.10 the default background image is distorted (the provided image shows a part of it). All GUI elements are displayed correctly. If I then select a different ...
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3answers
10k views

No screens found with usable configuration (Live-CD), boot-repair CLI

I have an MSi GE70 Laptop (Graphics: nvidia GeForce GT650M). At first I couldn't boot nor install. After adding 'nomodeset' in Grub I was able to start the installation. `Try Ubuntu`` just gave me a ...
0
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1answer
89 views

Assigning sounds on startup and shutdown

As every time i boot into ubuntu it makes sound, i want to assign a custom sound on startup as well as on log off and shutdown. Is it possible??
2
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0answers
40 views

Add entry to login user menu to directly execute command

I want to add an entry to my login menu to execute and run a program with whatever parameter I specify. I'm vaguely aware it is possible, but not quite sure how. As a side note, I want to ...