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

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Lightdm is giving me “The system is running in low-graphics mode”

I was trying macbuntu on Ubuntu 15.10 and due to some bug in it, i wasn't able to login into the system as login screen was coming again and again even after feeding in the right password. So, i ...
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1answer
25 views

Ubuntu Login Loop After Google Authenticator installation

My Ubuntu 14.04 LTS Desktop was working fine until I decided to play around with Google Two Factor Authentication for Linux. I followed instructions and setup the google-authenticator. When I ...
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12 views

Numix-circle icons not effective in Unity-greeter

I'm using Ubuntu 14.04 and using the Numix theme with the Numix-circle icons. I like very much the unity-greeter as a login environment, is elegant and I think it goes really well with the Numix theme ...
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1answer
25 views

Console login redisplays login screen after entering password

I attempted to login the console using 'ubuntu default' and after a very brief moment of displaying the desktop background I am returned to the login screen. It was working flawlessly until a few ...
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1answer
23 views

How to log in automatically in Xubuntu 15.10?

I'm struggling in my Xubuntu 15.10 installation to let my user automatically log in each time. I've found two interesting threads so far, but the are referring to older versions of Xubuntu, the ...
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11 views

Changing Wallpaper crashes desktop

Recently (might have something to do with lightdm), when trying to change my wallpaper (either manually or through an automated one like Variety) my desktop seems to crash to where I can't click on ...
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19 views

Why GNOME as default in Login Screen even after lightdm as Default?

After running sudo dpkg-reconfigure lightdm it has successfully set Unity as DE but there is an annoying text called (default) in Gnome's row when selecting DE at login screen. Is it normal ? ...
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19 views

ubuntu is loading forever

My 15.10 ubuntu laptop is not starting... (normaly) is just loading and loading not my picture but is the same if i go into the bootmenu and use safeboot and then go to comand line log in and ...
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31 views

Login loops back to login after upgrade from 12.04 to 14.04

After upgrading from 12.04 to 14.04 I encountered the login loop, I tried the soloutions posted here http://askubuntu.com/a/223634/499207 to no avail. The last one, dpkg-reconfigure lightdm made ...
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1answer
17 views

Error while attempt to change login screen background picture

Open a terminal and get root sudo -i (Type sudo password) Allow the user lightdm to create a connection to the X server xhost +SI:localuser:lightdm Switch user to lightdm su lightdm -s ...
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24 views

Kubuntu 14.04 not loading lightdm after update

After updating my Kubuntu 14.04 setup yesterday, the computer now stops booting before the login manager pops up. Pressing the Esc key reveals that the lightdm manager is failing to load for some ...
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114 views

Why does my thinkpad log in automatically if I lock my screen, shut my lid and then reopen it?

I've noticed some strange behaviour while working today. If I lock my screen with ctrl+alt+l it takes me to the login screen. If I then decide to shut my laptop it suspends correctly. But when I ...
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14 views

lightdm greeter complains Failed to open /dev/null

While upgrading from Ubuntu 12.04 to 14.04 something went sideways. I picked at it and got through. My system's very functional now. However, Lightdm is screwed up. If I manually run X and activate ...
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13 views

Unity-greeter or lightdm-greeter-gtk change password on login screen

I'll install and configure Ubuntu 14.04.3 with ActiveDirectory and All ok, but I can not configure the change password on login screen. Message with warning about expaire password display, but ...
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1answer
36 views

lightdm crash back to login Ubuntu 15.10

I tried the solution posted in Ubuntu 15.10 random lightdm crash but when I got to the step of reinstalling lightdm* a couple errors came up (I didn't write down what they were). Now I'm stuck in ...
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18 views

Lock screen automatically in lightdm

I have a custom install of Ubuntu with lightdm and openbox. I want to automatically lock my screen when it is inactive for a set period of time. I can lock my screen with dm-tool lock But I don't ...
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101 views

Lightdm won't start anymore - Intel i915

I gave a try to nvidia-prime. Worked at first had my desktop running on nvidia card, but after reboot, it stopped working so I purged the nvidia packages and I am now stuck with a lightdm not running ...
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29 views

How to set default desktop enviroment 15.10

Things appear to have changed from 14.04. Then, my last desktop environment was remembered and I did not have to select one each time from the greeter login. One user defaulted to cinnamon, another to ...
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1answer
31 views

Lightdm doesn't show wallpaper/background and colors are wrong

The symptoms of the problem are that only default Ubuntu wallpaper is shown in the login screen, the password field, host name (in the top left corner) and menu (in the top right corner) have an ugly ...
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26 views

Crash X manually

I'm working on a the famous freezing of X server. I've already created a question about frozen X server detection As I don't have relevant answer yet, I'm wondering if anyone knows a way to ...
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62 views

Cannot make it to login (gdm/lightdm bugs) after Nvidia driver update tentative

I used my girlfriend's computer which runs on Ubuntu 15.10 (wily) and wanted to update the Nvidia GPU. I did install the last driver released on the Nvidia website corresponding to this Geforce GT720. ...
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1answer
83 views

Ubuntu 14.04 LTS 64 bit login loop

I have Ubuntu 14.04 LTS 64 bit. So I changed my password through recovery mode, and now it is in log-in loop. Whenever I put Xauthority it says "No such file or directory" When I put in my actual ...
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1answer
26 views

Quit LightDM & launch a new x-session with an alternative xorg.conf

I'm using Ubuntu 15.10 with the following configuration: LightDM, XFCE, set to one screen across two physical monitors running from two outputs on a single NVIDIA card. This is my normal environment ...
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2answers
66 views

Ubuntu 14.04 stuck in login loop after update, nothing seems to help

I updated my ubuntu 14.04 after it was being unused for 4 months. The updating took enormously longer time than usual, and after that the computer was very slow. I rebooted the computer and now I ...
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2answers
59 views

can't start lightdm without systemctl

i'm running ubuntu 15.04, nvidia card 970gtx, drivers installed manually using nvidias script. i have fake raid 0 to dual boot windows 7 and ubuntu. i also have 4 drives using mdadm for raid 5. ...
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21 views

Lightdm Webkit Greeter, can't use it

I have Ubuntu 14.04, and ATI HD 7870, using fglrx-updates driver. I just installed lightdm-webkit-greeter to use some themes. However, to activated all the guides I saw said; change the: ...
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36 views

How can I run a local command (to run a script) on (just before) log out of a Unity session?

At the risk of posting a duplicate question: How can I run a local script (as the current user) when I log out? I read (and tried) among others: This one (Marton's version), which did perfectly ...
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1answer
46 views

15.10 lightdm broken - gdm works

After some updates to my system lightdm seems to be broken (can't get a session with lightdm to work, always ending up in low graphics mode at boot). If I chose gdm it however works. But I would like ...
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33 views

How do I restrict a user to a specific thin client?

I am using 10 thin clients on Ubuntu 14.04 LTS with an xdmcp server. All thin clients display all user names and allow any client login with any user account. Even two or more thin clients login with ...
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1answer
35 views

Xubuntu lock screen appearing twice

When I leave my machine for an extended period of time, I return to find the screen locked (by light-locker). I can then enter my password, and it is accepted, but then the lock screen is displayed a ...
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64 views

Fully encrypted system boots to Terminal login instead of GUI

When I switch on computer, because I have it encrypted, it always first asks for my passphrase in the GUI. I enter the phrase, then still in the GUI it normally asks for my password, and goes to the ...
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48 views

Ubuntu 14.04 LTS fails to boot into GUI

I've been using Ubuntu 14.04 desktop for about 6 month when the system locked up. Couldn't switch to another session or kill any processes, etc. only the mouse was responsive. Before it locked up I ...
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22 views

How can I start LXDE right after installing it?

On a fresh Ubuntu Server 15.04 I ran (from a Vagrant provision script) apt-get install lighdm lxde After this, I expected service lightdm start to display the session opening dialog. But ...
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56 views

How to change default window manager to Lubuntu from openbox?

After crashing my Lubuntu 14.04, my PC shows me an "ugly" login-window and then loads a desktop environment (or more precise probably a window manager) that has a grey background and a context menu ...
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40 views

Ubuntu 14.04 Login Loop - need to create new user after every reboot?

I'm running ubuntu 14.04 on a virtual box within a windows 8 host machine. I've had the misfortune of stumbling upon the dreaded ubuntu 14.04 login loop after a sudo apt-get upgrade command, and have ...
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46 views

Cannot install lubuntu-desktop because of lightdm-gtk-greeter

It appears as if my lubuntu-desktop was deleted from an autoremove. Now I try to install the package via terminal. When I do so it says that I need to install lubuntu-default-session because of ...
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21 views

Start X After Root Autologin Via Mingetty

I am currently running Lubuntu 14.04 x86_64 on an old Pentium 4 desktop destined to be a home theatre PC. As a consequence of multiple failures while trying to configure LightDM to autologin I ...
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2answers
81 views

Problem with nVidia GPU, not working lightdm

I'm trying all day to get my nVidia GT650M working, but without success. I tried to switch graphics card in nVidia Prime, but after logout screen goes black and Light Display Manager won't start, ...
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39 views

Ubuntu 15.10 Desktop x86-64 Enabling manual login leads to “The system is running in low graphics-mode”

EDIT: If you want to see the pictures properly embedded, look at my post at an other forum (was advised to ask here again): ...
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54 views

Ubuntu 15.10 - Change loading screen [duplicate]

Well, I´m trying to change that awful purple screen with the white/orange dots on my Ubuntu 15.10 while it is loading. Not the login Screen or background. That is already solved. I would like to see ...
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2answers
79 views

mdmsetup returns exit status 1

I'd like to install and use mdm over lightdm with Cinnamon. I've installed mdm, but gksudo mdmsetup just opens a dialogue requesting authentication, then immediately exits with code 1. There's ...
3
votes
1answer
59 views

How can I remove AbiWord?

I've just installed Lubuntu, and then I threw Cinnamon on top of it. Every time I log into any session: gnome, cinnamon, lxde, abiword opens immediately, as if I had told it to. I'm not a fan of this ...
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1answer
44 views

How to purge SDDM/Plasma completely

I recently installed KDE just to give it a go. I didn't really like it, so ran sudo apt-get purge kubuntu-desktop plasma-desktop. That seemed to fix it initially, after two reboots everything was back ...
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20 views

lightdm: part of screen is missing

I have a problem with my pc that whenever lightdm comes up, one side of the screen is missing. I though it was the resolution of the image and it does not scale properly to the screen so I spent ...
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0answers
51 views

Unity Greeter Background NOT Changing!

So ever since I upgraded to 15.04 from 14.04.. The unity greeter started using the wallpaper from my unity desktop as its background.. I have tried using ubuntu tweak but it blinks my custom ...
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38 views

Desktop not responsive after ubuntu-gnome-desktop installation (Ubuntu 15.10)

In order to use gdm instead of lightdm I followed the instructions from this post I could then use gdm but my desktop (meaning the background area) is not responsive anymore and shows the login ...
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1answer
87 views

Two different login/lock screens

I have Ubuntu 15.10 installed and when I first start my computer it gives me the really nice looking ubuntu lightdm login screen but anytime I lock the computer I get the really nasty looking gnome ...
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1answer
55 views

Lightdm greeter - theming of option-button

I try to theme the unity lightdm greeter and I've succeeded in doing so by looking at the source code and the Ambiance .css files. One thing I'm not able to theme however is shown in this short video, ...
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55 views

Ubuntu 14.04 LTS login loop both in unity and gnome

after uninstalling a not-working Chinese input method, I have been experiencing a login session loop problem. After I type the correct password for the login, the screen blinks and comes back to the ...
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47 views

How to get back Unity Greeter? Replace MATE Greeter?

So I installed Ubuntu Mate desktop environment for my 14.04 LTS (Trusty) and I am really liking it but Mate also replaced the Unity greeter which I want back... I searched about how to get back the ...