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

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lightdm failed to start session; user folder requesting Gnome

We're migrating some old 10.10 users on Gnome to 14.04 using Unity. When they log on, however, the lightdm greeter complains "Failed to start session." /var/log/lightdm/lightdm.log notes: ...
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2answers
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Upgrade to 13.04, user picture shows up on lightdm. Can I change it?

So, I recently upgraded my Xubuntu to 13.04, and afterwards I noticed that there is now a picture of me on the lightdm login screen. I have no idea where this picture came from, I don't remember it ...
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0answers
9 views

Where does lightdm change $PATH

I use lightdm on my Ubuntu 12.04 and I have the entry /usr/lib/lightdm/lightdm in my $PATH if I login through lightdm. Now I'm cleaning my $PATH and I simply want to know where this entry gets added. ...
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3answers
12k views

How to remove session entries from LightDM?

I recently added Cairo Dock to my GNOME Shell in 11.10. Cairo Dock is GREAT, but I'm left with one little problem that I'd like to fix: after installing Cairo Dock, LightDM includes two extraneous ...
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0answers
18 views

Unity greeter wallpaper missing

After following this guide, whenever I use a custom wallpaper (one that is not from the official wallpapers), the background of the login screen shows only purple instead of my wallpaper. However, if ...
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3answers
4k views

Cannot pass the login screen after upgrade to 12.04 from 11.10

I just performed the upgrade from Ubuntu 11.10 to Ubuntu 12.04 LTS. The updater downloaded all packages but a few ones that the system said were already installed. When asked for it, I chose to ...
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2answers
4k 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 ...
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0answers
10 views

Black screen after booting Ubuntu 14.04 LTS [duplicate]

I'm new to Ubuntu 14.04. I changed some configuration and installed Gnome. I chose Display manager as GDM. After I restart, it boots but the login window does not appear. It shows a black screen ...
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2answers
147 views

Ubuntu 14.04 - No Unity in user account, but in guest account

Yesterday I switched back from Linux Mint to Ubuntu 14.04 and after installation I faced the following problem: When I login with my user account Unity isn't loading. I can see no desktop elements - ...
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2answers
93 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
30 views

fix “The system is running in low-graphics mode” error without internet

I'm very sorry for asking about this error in another question but all the solutions in here require for you to have internet. I only have wireless internet and when I am in that console the internet ...
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3answers
1k 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 ...
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1answer
284 views

12.04 After HWE upgrade and running Ubuntu Tweak to clean cruft, can't start lightdm

I did the HWE upgrade and that worked fine. System started fine. But I ran Ubuntu Tweak and it reported massive amounts of cruft. So I did the Janitor and uh-oh...system boots to command line ...
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0answers
21 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 ...
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2answers
46 views

Black Screen after boot (14.04 x64)

I just recently installed Ubuntu 14.04 x64 on my Computer as I wanted to give it a try. The installation went smooth and fine as expected, I was even surprised how much faster then the old fedoras ...
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1answer
29 views

How to detect the vga signals [on hold]

I am currently working on Ubuntu 12.10. We have functionality as we have two cameras (say left and right cams) for recording the videos which creates two different streams as stream-1 and stream-2. ...
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2answers
15k views

Don't list all users at login with LightDM

I just upgraded to Ubuntu 11.10 and I was wondering if it's possible to not list all the current users and instead require the user to type in their username? My company's IT policies require that ...
8
votes
3answers
12k 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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0answers
9 views

Process 'leaking' from lightdm session

When I restart lightdm or log out and log back in, a process is left left running. A new logind session is opened, but the old one remains running: c68 - john (1000) Since: Mon 2014-07-14 ...
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1answer
23 views

HELP! Nothing I do can log me in even though credentials are right [closed]

I just installed Linux Lite (I know, wrong forums but please help me because these forums are much better support-wise than the LL forums, and LL is based off of ubuntu so it should be pretty much the ...
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1answer
328 views

LightDM freezes at first startup

Nearly every time I bootup my Ubuntu I come to the login screen. But instead of showing me the wallpaper from selected account, I just see the default purple background with those white dots on it. ...
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0answers
32 views

Upgrade from 12.04lts to 14.04lts login loop

Kinda a newb but I upgraded from 12 to 14 when I did I changed my login password now when I try and login I get into a loop, if I do this I can login in "These suggested instructions apply to my case ...
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33 views

X Server config used by lightdm

What I want to do is to start a x server just like the lightdm did. But I can't get the X server perform just like the one started by lightdm. I see the X server process executed by lightdm is: root ...
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1answer
62 views

How to edit lightdm.conf file

I tried to activate numlock in the login screen using numlockx. The instruction point me to add this line greeter-setup-script=/usr/bin/numlockx on to this file /etc/init/lightdm.conf I tried ...
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1answer
56 views

Installing Gnome 3, should I use gdm or lightdm?

I'm currently using Xubuntu 14.04 and I wanted to try out Gnome 3, so i started installing it, and during the installation it is asking me what display manager should I use by default: gdm or lightdm. ...
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0answers
23 views

BlueProximity and LightDM / Xubuntu [duplicate]

I would like to use BlueProximity to lock/unlock my session in Xubuntu 14.04. Problem is that I could not find LightDM command for unlocking a screen (googled several times). I would prefer not to ...
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1answer
1k 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
22 views

Ubuntu 12.04 login returns me to login manager, how to diagnose?

This started with me adding a graphics card to my system. When I booted up, ubuntu complained that the graphics config had changed, and gave me a terminal session. I copied ...
48
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15answers
72k views

Ubuntu gets stuck in a Login Loop

My problem: As you can guess my Ubuntu is stuck in a login loop when trying to enter my desktop. Means the screen gets black and soon after that the login screen comes back. I'm a Ubuntu Newbie so if ...
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0answers
16 views

Xmonad keyboard not working (Macbook pro)

I've installed Ubuntu 14.04 on my Macbook Pro retina (11,1) and it all worked swimmingly. Then I tried installing Xmonad, selected it once from my lightdm manager and now it loads by default. (The ...
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2answers
28 views

unable to login after removing guest account

Hello i try to disable the guest account in ubuntu 14.04 by typing these commands sudo gedit /etc/lightdm/lightdm.conf allow-guest=false After re-staring ubuntu it boot up but dos not go to ...
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0answers
25 views

How to enable Lubuntu lightdm dinamic autologin (sorry for my english)

Hi I freshly installed Lubuntu 14.04 I disabled lightdm autostarting by editing /etc/default/grub Well.. I got some problems "sudo service lightdm start" is working but startx command always ...
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1answer
2k views

Personalize monitor position before login

I'm using multiple monitors. When logged in everything I fine. Left monitor is positioned left and right monitor is positioned right, but before I login the login screen positions them the other way ...
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0answers
9 views

Microsoft LifeCam HD-3000 slows down login

As long as my Microsoft LifeCam HD-3000 is plugged in my machine freezes for about 30 seconds as soon as the login manager comes and another time right after I put in my password. This is seriously ...
0
votes
1answer
23 views

Impossible to start Ubuntu after installing lxde

i just tried installing lxde on my Ubuntu 14.04. I wanted to try working with two different screen at the same time. So to do that typed CTRL+ALT+F2 to go in another terminal and then i typed the ...
3
votes
2answers
2k views

Ubuntu 12.04.3 Graphics Issues: Broken Pipes, Reinstalled Xorg and Bumblebee

It seems I have a problem, and am only making it worse by following what I find online. I have a new Asus N550JV-D71 (not sure about the part after the dash, though I definitely know it includes 71). ...
2
votes
1answer
2k 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 ...
16
votes
5answers
30k views

After logging in, there's a black screen and my cursor, nothing else! in Ubuntu 12.10

I've been using Ubuntu(12.10) for a long time, and recently, my Ubuntu went through yet another update. The whole update prompt showed up, following by a password prompt, and finally the good ol' ...
4
votes
1answer
125 views

How to make ubuntu 14.04 a kiosk

I have made a clean install of Ubuntu 14.04 LTS Desktop and now want's to convert it into a kiosk with a full screen webbrowser. This was previously done in 10.04 and worked perfect, but due to ...
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0answers
14 views

Can't set unity-greeter background on 12.04.1

I used Ubuntu Tweak to customize the login screen. Changed the background settings, so it used desktop wallpaper as login screen background. It worked at first but then I selected a custom wallpaper ...
0
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1answer
33 views

Unable to login into any account

How it happened My computer was becoming very unresponsive and I could not close any applications to free memory so I held the power button until the computer turned off. When I turned it on ...
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vote
3answers
5k 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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0answers
33 views

Disable laptop display before login

I am looking for a way to disable my laptop's built in display before (or right at) the login screen on Ubuntu 14.04. I have a second monitor, and want to only use that. I already have changed the ...
0
votes
1answer
67 views

KDE 4.13.2 update breaks login from LightDM on Kubuntu 14.04

One of the KDE updates that rolled out in the last couple of days broke my ability to log in to KDE from lightdm using the lightdm-kde-greeter. At the lightdm prompt, I enter my login credentials, the ...
0
votes
1answer
80 views

Is there a way to disable portrait/login picture display in the Xubuntu login?

I recently upgraded a machine from XUbuntu 12.10 and now the login screen has a blank silhouette that looks like the Facebook empty profile picture. How do I disable this and get back to just username ...
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vote
1answer
50 views

Lightdm issue after installing xmonad, Ubuntu 14.04

Yesterday I decided to install and try Xmonad on my laptop running a fairly fresh install of 14.04. After running an Xmonad session i decided to try the Gnome-xmonad (or something similar) option. All ...
0
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1answer
73 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 ...
3
votes
1answer
301 views

Laptop using 14.04 won't get past login GUI

My laptop was working perfectly yesterday, and now today I can't log in. At first, I was only getting a black screen. However, after following instructions in some questions here on AskUbuntu, I ...
0
votes
1answer
29 views

Fluxbox Lightdm nautilus

I recently started using fluxbox, I'm using Lightdm as a desktop manager and was using gnome/unity before fluxbox. I'm facing a few troubles while trying to adapt to this new window manager, the ...
3
votes
2answers
107 views

Opencl application does not recognize GPU till user physically ( and not remote) logs in to machine

I run some opencl applications on 2x AMD Radeon HD 7870 on a machine running Ubuntu 13.10. I power the machine on and lightdm has the login prompt. Since I cannot physically be present to login to ...