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

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14.04 Trusty Tahr who command output

I have a question that arose in my mind after upgrading to 14.04 TrustyTahr from 12.04 PrecisePangolin. The question pertains to the 'who' command, and its output. On previous editions of Ubuntu the ...
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51 views

Lock Screen from root shell

I try to set up a script to lock my screen when I unplug my Yubikey. At the moment I am stuck with the correct way to send the command to lightdm. That were my tries: smiddy@3000-N200:~$ sudo su - ...
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2answers
80 views

ubuntu 14.04 login keyboard stuck on english. I want french keyboard

I installed Ubuntu 14.04LTS on a french computer (AZERTY keyboard, see below) but I selected english keyboard while installing Ubuntu. Then change my keyboard parameter like this: and here is my ...
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3answers
34 views

Uninstalling xubuntu-desktop help login

i installed xubuntu-desktop via the code below : Sudo apt-get update && sudo apt-get install xubuntu-desktop But after installing, a few functions did not work such as the system properties ...
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25 views

How to start a new X windows system in other display in Ubuntu desktop 12.04

As we know, in ubunut desktop, When you power on the system, it will start a Unity Desktop using lightdm in display :0. And you can operate the system in tty7. If I want another Unity Desktop in ...
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3answers
684 views

Cannot Log In to Gnome 3.16 Dekstop

I have installed Gnome 3.16 on my Ubuntu 15.04 (previously updated from 14.04) via: sudo add-apt-repository ppa:gnome3-team/gnome3 sudo add-apt-repository ppa:gnome3-team/gnome3-staging sudo apt-get ...
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1answer
37 views

Remove KDE greeter and install lightdm

So I had installed multiple desktop environments, later removing them, however the greater was still there, in attempt to remove the greeter (KDE), I have actually removed lightdm. So how would I ...
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58 views

Login Loop on lightdm but not gdm

One of my user accounts is getting a login loop on lightdm but not on gdm. Does anyone know why this might happen and what I may be able to do to log on to the account using the lightdm display ...
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1answer
15 views

Black Screen with Cursor on boot

I've only installed Ubuntu today.. I have booted into it many times but now it's showing up with a Black screen and a cursor. This happened after I tried to change my login screen to the LightDM ...
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1answer
117 views

Blank screen with blinking cursor after running xdiagnose

I have had this problem twice in a row trying to follow these instructions: Solution for low screen resolution in Ubuntu 14.04, Ubuntu I have installed Ubuntu 15.04, and had everything running okay ...
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2answers
73 views

Why has lightdm-remote-session been removed from Ubuntu 15.04?

Straightforward question, really. I must admit I haven't used it much, but just recently had started doing. Now it's not in the repositories. What's the thinking behind that?
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2answers
151 views

How to start Pantheon from the command line

Long story as to why I've chosen to go this route, but I've installed Ubuntu Trusty without a desktop, and then installed pantheon, pantheon-shell, pantheon-greeter and elementary-desktop packages. ...
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2answers
428 views

How can i set different wallpapers for Ubuntu 15.04 login and Desktop

This has been bothering me very much. i have memory that Ubuntu 12.04 had this configuration? am i wrong? finally, is it possible for the login screen to have different wallpaper from the desktop? is ...
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1answer
138 views

Shutdown just logging out

I have an older hp pavilion all in one pc and after upgrading to 15.04 whenever I tell the computer to shutdown while in unity (haven't tried other DEs) it goes to the login screen as if I'd only ...
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0answers
5 views

Ubuntu 12.04 freezes and does not always let me switch to text-based to restart lightdm

I switched to an old laptop after my two main ones stopped working and this one frequently freezes. At times it will allow me to switch to text-based (CTRL+ALT+F1) and restart lightdm (which is ...
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17 views

Xorg and issues

Today I've tried to install the SixAxis controller using the official wiki page. It succeeded until I removed the harddrive and this happened ...
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2answers
512 views

“Starting version 219” after kernel upgrade to 3.19.0-18

Today after kernel upgrade from 3.19.0-16 to 3.19.0-18 lightdm fails to start. GPU driver is fglrx installed from "Additional drivers" tab of "Software & updates". Try to enable service by ...
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26 views

How can I remove a specific user from the Ubuntu login screen? [duplicate]

I am using Ubuntu 14.04LTS. When I login, there is an extra user called 'Oracle' present. How can I hide this?
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2answers
103 views

Can't get rid of Lubuntu's Login Greeter

If I lock my computer or logout, when I log back in, I want to see unity-greeter. But I can't seem to get rid of Lubuntu's greeter upon logging in. I once installed Lubuntu but have since uninstalled ...
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1answer
82 views

How to edit (CSS) LightDM GTK+ Greeter

Is there a manual or does anyone know how to edit the (CSS) files for the LightDM GTK+ Greeter? I'm already using LightDM Greeter Settings, but I want more customization. Somehow the webkit greeter ...
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48 views

Graphics changed after relogin on Ubuntu 15.04

So, a little background. While trying to fix the issue with chrome and other video player freezing when waking up from suspend, I think I accidentally changed some settings. And from my history I'm ...
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1answer
256 views

How to start lightdm services at startup

My system is running Ubuntu 15.04 and I've changed default boot to "text" instead of "quiet splash" by going through answer by @Bruno Pereira How do I disable X at boot time so that the system boots ...
0
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1answer
71 views

FS mounted as RO on boot after upgrade to 15.04

Just upgraded from 14.10 to 15.04. Couldn't get the system to boot ok. I could boot using (upstart) option - not using default systemd. When in default mode the lightdm terminal was stuck before login ...
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1answer
90 views

lightdm black screen after installing plasma5 in Ubuntu

I have both ubuntu-desktop and kubuntu-destop installed on my laptop. While sddm works perfectly fine during login, if I choose lightdm as the default login screen, after a reboot, I get a black ...
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1answer
81 views

Problem to stop lightdm

I'm trying to stop LightDM, but I receive the following error message (translated from German): root@robert-desktop:/home/robert/Downloads# stop lightdm stop: Connection to Upstart not possible: ...
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1answer
50 views

Black screen after uninstalling lightdm

i use 14.04 and have uninstalled Lighdm, because it runned jackd uppon starting the computer. Now when i start it goes into a black terminal, and i have no access anymore to the normal GUI display. ...
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LightDM 14.10: Desktop showing but status bar and quick launch bar not showing [duplicate]

When I boot into my main account the status bar and the quick launch bar are not showing (the desktop with the icons work correctly though). When I boot with the guest account everything works as ...
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29 views

Unity keep changing windows manager/template i don't relly now [screenshots]

After ugrading from lts 14.04 to last release 15, Unity keeps constansly changing windows manager or gtk theme don't really know which, also, gnome 3 doesn't work, i also had mate and xfce installed, ...
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24 views

Boot in text mode break X

this is my first question and i hope not be breaking any rules. I was trying to boot at text mode and followed these articles How do I boot into true text mode? Disable automatic unity launching? ...
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1answer
70 views

Crossfire Resets When Lightdm Restarts Ubuntu 15.04

So I had Crossfire running on 14.04, but I decided to update to 15.04 and now it's acting strange. I've gone through the typical steps of commenting out everything in /etc/init/gpu-manager.conf, and ...
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0answers
39 views

Unable to login from User account or Guest account (not a duplicate question)

I have Dell 3521 laptop without dedicated video card. It came with Ubuntu 12.04 installed. One fine day, it prompted me for an upgrade, which i went for. During upgrade, its battery finished and once ...
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50 views

Can't get Unity to reload after closing LightDM (Ubuntu 14.04.2 LTS)

Earlier this morning, my computer was running a little slow, and I decided to try to close Xorg using the System Manager(btw, I had done this a couple of times before without any ill effects). ...
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57 views

Completely unable to login

I've been trying to add more security to passwords, etc. I did the following things (in Ubuntu 14.04.2 LTS) in /etc/pam.d/common-auth, added (as first line) auth required pam_tally.so onerr=fail ...
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199 views

How to setup xorg to use multiseat in Ubuntu 14.04

I trying to setup multiseat on clearly installed ubuntu 14.04.02 with core i3 integrated video and nVidia GT260 video cards. I followed this miltiseat instruction on wiki.ubuntu and manual Multiseat ...
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1answer
466 views

LightDM and GDM login loop. Ubuntu 15.04 Gnome 3

At first the GDM worked just fine but all of a sudden I lost the ability to login. I can still get to my desktop using startx (sound doesn't seem to work when I do that but it might be a by-product of ...
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24 views

Unable to log in to any user account and with different Display Managers

All attempts to log in to my user account, guest, or an account I created to test get instantly thrown back to the login screen. I can log in through tty1 etc. I have tried deleting .Xauthority and ...
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After logging in through a display manager, xfce presents me with only a cursor and wallpaper (no icons, menus, etc.)

I had a hard drive stop working last week. Not a big problem, I just purchased a new one and restored the latest backup (I back it up using rsync on it while it is running). I get the computer working ...
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2answers
393 views

Removing the white dots from lightdm on 15.04

I have tried the approach that I have used before on earlier releases of Ubuntu but on 15.04 I have found that the following commands are not working. sudo xhost +SI:localuser:lightdm sudo su ...
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1answer
41 views

How to show a popup after login in 14.04

I tried to follow the procedure in the answer to this question How do I create a popup banner before login with Lightdm?, but I just get a blank screen. If I run my shell script on its own, I get the ...
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1answer
64 views

Problem logging into default Desktop Environment

I have just upgraded to Ubuntu 15.04, and now I have a problem. I cannot log graphically using the default desktop environment. When I log into the system it does nothing, and the logging screen ...
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366 views

Restore LightDM to original settings

I was playing around with "Ubuntu Tweak" and changed some of the greeter settings. Now I would like to restore LightDM to default. I believe the greeter is supposed to mimic the account background but ...
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3answers
358 views

Computer logs out while I lock screen

Recently, my laptop is behaving strangely sometimes. It doesn't usually does this but lately it frequently does. The problem is that whenever I lock the screen, the computer logs out and closes all ...
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14 views

Automatic Login to Desktop with Xubuntu Vivid 15.04? [duplicate]

When I boot up the computer, I'd like it to boot right to the Xubuntu desktop, rather than prompting me to login with lightdm. I'm aware that I can set up lightdm to not ask me for a password, but it ...
0
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1answer
146 views

unable to access to lightdm after messing with fglrx drivers and screwing up Xorg

I recently removed the fglrx driver from my ubuntu 14.04.2 laptop computer after noticing that it's not really good for the battery life. But after restarting I ended up with this screen (after the ...
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1answer
58 views

lightdm restarts in cycle when using /etc/X11/xorg.conf

I have a monitor Acer H233H and want to set resolution of 1920x1080. I googled it and found that it's necessary to use /etc/X11/xorg.conf. I created this file using sudo Xorg -configure, copied it to ...
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1answer
190 views

My ubuntu 15.04 file system is not writable

The problem started when my lightdm config got messed up and would only boot to a black screen with a cursor. In an attempt to fix this I booted up into recovery mode, dropped into the shell and tried ...
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63 views

What's causing my login resolution to reset incorrectly?

I'm trying to set up my 4 monitor system so all monitors are of the correct orientation during the login screen. I've set my lightdm.conf file up as follows: [SeatDefaults] ...
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0answers
72 views

Windows distorted, can't start lightdm - now can't even boot in graphics mode anymore

I have kind of an urgent problem here as my laptop turned out to be completely useless while on a trip. I'm using Ubuntu 14.04 on a Lenovo U410. When I boot, there is no problem. The login screen ...
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1answer
116 views

monitors.xml and LightDM

Firstly some background information: I have a 4 monitor situation, with varying resolutions - 2 monitors landscape (1680×1050,1920×1200) and 2 monitors portrait (both 1050×1680). Once I'm logged in my ...
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Ubuntu 12.04 : Adding widgets to the login panel

not sure where to start here, it's an area of config I'm not familiar with. Just wondering, is it possible to write some custom widgets for the panel that appears on the login screen? I've found ...