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

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How do I get my Unity login screen back after installing Lubuntu Desktop on 14.04?

I have installed lubuntu-desktop and xfce4 on a Ubuntu 14.04 installation. After doing so, my login screen changed. I have tried resetting my LightDM and attempted to modify the lightdm file, where ...
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65 views

Security problem - password not required after tying to active directory server

We have been using our AD server to authenticate Ubuntu users for years. We have a handy perl script that places all the correct config files and does all the work for us. However, I'm having a ...
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166 views

Force a user to use a specified session

I've looked everywhere and can't find how to do the following: What I have is Ubuntu 14.04 desktop 32bit configured with two accounts, one admin and one to run a web kiosk. I have set up a new ...
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2answers
3k views

Black screen on login maybe lightdm problem

Hi after I entered this command in terminal: sudo sh -c 'echo "greeter-show-manual-login=true" >> /etc/lightdm/lightdm.conf' and I reboot my PC i cannot login to ubuntu. After i select the os ...
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1answer
171 views

upgrade to 14.04 added lightdm to server edition

The update from 13.10 to 14.04 using do-release-upgrade seems to have added lightdm to my computer. On top of that, lightdm wasn’t even set up properly, nor do I want it set up. I prefer not to use ...
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2answers
455 views

lightdm: cannot type password on login screen

I am running 12.04 LTS, fully updated. My system is configured to automatically log me in into my account. Auto-login works fine. However, sometimes I need to access the unity-greeter/lightdm login ...
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33 views

restart lightdm - Are my applications gone?

So I have machine with an ATI graphics card which means restart lightdm is my second most used command right after ll. My question is, does restart lightdm blow away all the applications that were ...
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1answer
754 views

“exec: gnome-session: not found” when login using ligthdm

On login the password is accepted but it returns back to the login screen. Tried multiple times even after reboot ... same behavior. I had left my laptop (Lenovo Ideapad z510) in suspend mode (lid ...
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429 views

Multiple monitor issue with Gnome 3.10 running Ubuntu 14.04 LTS

I did a fresh install of Ubuntu 14.04 and installed Gnome Shell. When I enter display setting everything seems to work fine, that is until the next log off or reboot. For some reason the settings ...
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0answers
449 views

Lock screen not working

When trying to do something, I used the command "Service lightdm disable" or something like that. From the moment I did that, my lockscreen is not working anymore. How do I make it working again? ...
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1answer
456 views

XAuthority Error [duplicate]

When I try to login to my ubuntu 12.04 it accepts my account info and password but then a black terminal page appears and disappears very fast and it goes back to login page. I killed lightdm and then ...
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0answers
1k views

14.04 Trusty Tahr LIghtDM No way to switch session

I installed Trusty on my laptop. I like Gnome Shell more than Unity. So I installed Gnome Shell via Software Centre. I have LightDM 1.10.0 installed on my system. Unlike the previous version it ...
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54 views

Unity will not log on

Unity will only log onto the guest version on my computer, when I type in my password normally it momentarily flashes to a black screen then return to the login screen. When running unity through ...
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1answer
419 views

Ubuntu 14.04, Nvidia Driver 304.117 for 7600GT

I have a clean new installation on an SSD Drive of Ubuntu 14.04 with NVidia Driver 304.117 running. After (very quick) boot I can hear that the login screen has started but no picture on my F-HD ...
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1answer
70 views

Cannot go to black screen (Manual login, Ctrl+Alt+F2) and cannot stop light dm

I have Ubuntu 12.04 installed on my Connoiseur work station with Intel Xeon processor. It has Tesla C1060 graphics card. Recently, the system encountered a kernel error and a pop up window appeared ...
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2answers
636 views

ldap client causes boot to be very slow on 13.10, causes hang on 14.04

I have successfully configured ubuntu as an ldap client following the howtos found on this site. i do the following. 1) apt-get install libpam-ldap nscd 2) configure ldap-auth-config 3) change ...
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1answer
2k views

lightdm doesn't start

Today when I started Ubuntu, it didn't start lightdm, showing a black screen. I changed to console Ctrl-Alt-F1 and tried to start lightdm manually sudo start lightdm It threw me to the graphic ...
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22 views

Add monitor settings in lightdm

Where do I have to place missing monitor preferences in lightdm, to load them at startup?
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2answers
9k views

Unity greeter does not display custom wallpaper

I am using Ubuntu 14.04 LTS 64 bit . I know this question has popped up many times but I want to make it very clear that none of the posts helped me a bit. my Problem: I am unable to get my custom ...
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0answers
130 views

How to increase or decrease brightness in the login screen when running within Virtualbox?

I can't able to increase or decrease screen brightness on the login screen. Is that possible to change brightness on login screen?
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0answers
195 views

14.04_x64 / Nvidia GT 240 , HUGE font notificaton at greeter and in naulitus after log-in

I've been using 12.04 for a long time - excellent version indeed, I decided to try 14.04 today. Installing without any problems. My VGA is Nvidia GT240 (legacy one), Nouveau display driver is fine, ...
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0answers
204 views

Problem to set the LightDM wallpaper in Ubuntu 14.04?

I used Ubuntu Tweak to change the login screen background, but it didnt work for my user. My Ubuntu has 2 users. To my user (admin) it shows the correct image (that had set in Ubuntu Tweak) for less ...
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1answer
777 views

Can't switch between lightdm and gdm

I installed Ubuntu Studio 13.10 from a minimal CD, and then upgraded to 14.04. But since the cd install, I have been trying to change from gdm to lightdm. I have tried sudo dpkg-reconfigure gdm, sudo ...
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1answer
2k 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 ...
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1answer
5k views

No desktop appears after loged 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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1answer
2k views

LightDM is missing Gnome Shell icon

the Icon of Gnome shell is missing from lightDM.. I had to manually add Gnome Shell to lightDM because it didn't install properly on my machine. now I don't now how to add the Icon to lightDM. Im on ...
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3answers
39k views

How to configure lightdm to allow manual logins in Ubuntu 14.04

I used to modify /etc/lightdm/lightdm.conf, adding the line greeter-show-manual-login=true, in order to allow login for hidden users and root. Now I've just installed the new Ubuntu 14.04 and the ...
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2answers
938 views

black screen / low graphics mode on logout

If log out from session, get black screen and the "low graphics mode" dialog, sometimes with cursor, sometimes without. 14.04 with latest fglrx. Dual head Pavillion dv6-6051er. ONLY when log out. ...
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3answers
4k views

How Do you set up numlockx at startup in ubuntu 14.04

In ubuntu 13.10 in order to install numlockx you had to run: sudo apt-get install numlockx After you install numlockx you had to run: gksudo gedit /etc/lightdm/lightdm.conf At the end of this file you ...
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1answer
422 views

No lockscreen option in CCSM 14.04

I expected to find Lockscreen option in CCSM after upgrading to Ubuntu 14.04, in Unity Plugin, general section, in order to switch between unity and lightdm. Unfortunately, It's not in the tab. Why?
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5answers
23k views

How do I set the LightDM wallpaper in Ubuntu 14.04?

In previous versions of Ubuntu, picking one of the default wallpapers meant that you saw it on the login screen as well. I am now on a clean install of Ubuntu 14.04, the LightDM wallpaper appears to ...
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1answer
33 views

How to show old account on the greeter

TL;DR --> I want to know how to make an old account show up after reinstallation of Ubuntu so that I can log in to that account and not have to reinstall all the other software I had installed on that ...
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1answer
77 views

Incidentally removed lightdm - how to get it back?

I have incidentally removed lightdm, by sudo apt-get purge lightdm. Now I am not seeing login screen when starting the computer. (only black background.. nothing else) How to restore/install it back? ...
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1answer
362 views

LDAP authentication: not able to login through GUI but able to login from console

I am building a LTSP environment with LDAP authentication. I have configured the LTSP,LDAP server and client perfectly. I checked with getent passwd command in LTSP/LDAP client. I can see my LDAP ...
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2answers
229 views

how can I costumize lightdm theme?

After I upgraded to 13.10 an ugly white icon theme appeared at top panel of lightdm, which does not fit bluish theme. I am using zorin greeter. I also tried gtk greeter but I didn't like it. I took a ...
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0answers
164 views

How do I rotate the login screen?

So I am trying out the 14.04 and I keep both of my monitors in portrait mode. But the login splash is in landscape. But I can't seem to figure out how to rotate my login splash or where the config is ...
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3answers
177 views

Why do desktop / monitor screens fail after staying logged in overnight?

I am currently running Ubuntu 13.10. I experienced this same issue with Ubuntu 12.04, so I dont believe the following issue is tied to a specific release. I am using Ubuntu for work, by choice. Id ...
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1answer
9k views

Why don't my lightdm.conf edits affect my desktop screen resolution?

I wanted to change my desktop screen resolution to 1366x768. But my VESA drivers(AMD REDWOOD) did not detect that resolution. So I created a shell script as follows:- xrandr --newmode ...
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1answer
204 views

Any way to change lightdm unity greeter background without changing current config files?

About changing lightdm unity greeter background image, most answers are to change /usr/share/glib2.0/schemas/com.canonical.unity-greeter.gschema.xml. Is there any way to change the default wallpaper ...
4
votes
1answer
346 views

How do I enable a specific pam config in the lockscreen?

In Trusty, there is a new lockscreen that fits the look and feel of lightdm, and shares some config files, especially for pam. I am using libpam-fprintd to allow using my fingerprint reader when ...
2
votes
1answer
34 views

Is there a way to switch into another user account from a script?

Let's say I have an account on a small network of machines that is set to auto-login. If one of the machines has a problem with the network or one of its services, I need to break out of the ...
3
votes
2answers
1k views

Start another GUI on different TTY

For some reason I want to have 2 GUIs open at different TTYs. the commands sudo service lightdm stop/start will stop/create a new GUI at TTY7. but how can I do the same at different TTYs or ...
0
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1answer
53 views

Unable to login from GUI?

Running 13.10 x64 on an Ubuntu laptop (System 76 Kudu Professional). When I bootup and provide my password; the screen goes black for a moment then returns to the login screen. Switching tty I am ...
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0answers
392 views

Ubuntu 14.04 - enable numlock on login [closed]

Numlock is not activated in lightdm: https://bugs.launchpad.net/ubuntu/+source/unity-greeter/+bug/1271953 Workaround for ubuntu 13.10 : sudo apt-get install numlockx gksu gedit ...
2
votes
2answers
243 views

Not able to login with LightDM

I am using Ubuntu 13.10 with Unity desktop. Unfortunately I am not able to log into my desktop. After entering correct password it keeps looping back to login. Could you please help me to sort out ...
0
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1answer
423 views

When watching video full screen online, screen goes grey

When I have watched a video online (usualy with YouTube video's), be it with Firefox or Chrome and press the button to exit full-screen mode, my laptop screen turns grey and there seems to be nothing ...
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1answer
331 views

Start ubuntu with xrandr generated screen resolution

First of all, sorry for starting a new question. I couldn't see the forest thrue all the trees anymore is what we would say here in holland. It started with this question where I didn't know how to ...
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223 views

How to start xfce4 session inside upstart user session?

I would like to use a upstart user session to run some jobs under user control. My machine has mythbuntu installed which means I have lightdm which starts an xfce4-session. How should I replace my ...
2
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3answers
1k views

Ubuntu won't let me login after software update

I'm a Ubuntu Newbie so I'll try to do my best but I'll need step by step procedures please. I have 13.10 installed and after last night's update, I can't login. The keyboard is slow to answer and ...
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0answers
163 views

How do I adjust DPI in 12.04

I think that I want (need?) to adjust my DPI. Qualitatively, text is very small and I usually find myself increasing text size in text editors, web browsers, etc. Quantitatively: The 1" square here ...