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

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How to disable the shutdown, reboot and hibernate options in the lightdm loginscreen?

I'm currently building a kiosk system based on xubuntu 16.04 and have to lock it down, in order to do that I arrrived at the point where I want to disable the above mentioned option in the lightdm ...
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22 views

Set default Resolution system wide

I'm using Ubuntu 16.04. addicted@ADDICTED:~$ xrandr Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 16384 x 16384 DVI-I-0 disconnected (normal left inverted right x axis y axis) DVI-I-1 ...
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1answer
30 views

I mistakenly purged gsettings-desktop-schemas; how can I recover?

Here's how things went from bad to worse: I wanted to remove an item (an icon) on the Unity-greeter top panel. (The greeter is the only Unity thing I use). So I made some changes in one of the Unity-...
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1answer
6 views

Access LightDM configuration in KDE system settings (Kubuntu 16.04)

I'm running Kubuntu 16.04 and use LightDM (not SDDM). In a previous version of Kubuntu it was possible to access the LightDM configuration (e.g. changing background,...) via the KDE system settings. ...
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1answer
10 views

Login with LightDM fails

I try to login with LightDM on Kubuntu 16.04. LightDM is the only installed display manager. I see the login screen and enter my password, but I get the message Failed to start session. The last ...
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1answer
44 views

startx doesn't work on ubuntu 16.04

I modified grub, so that whenever I boot, it starts in command line mode. However, when I type startx, it gives me a screen with the ubuntu background on it and my cursor is an x. I can open things ...
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18 views

How do I configure the lockscreen to use my PAM module in 16.04

In 14.04 I was able to do this by adding a line to /etc/pam.d/lightdm and my module is invoked for both login and the lock screen. In 16.04 it is only invoked at the login screen; the lock screen ...
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1answer
9 views

lightdm launches upstart with a proxy configuration. Why?

My computer seems stuck with a bad case of an hardcoded proxy. I have already tried setting no proxy in the Ubuntu configuration utility and applying the change system-wide. Grepping /etc for the ...
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0answers
15 views

login error in Ubuntu 16.04 with X authority problem

I've Installed Android Studio and wpscan metasploit and LAMP Stack server on my system. The next day when I've tried to login to my system I got that black loop page and backed to my login page. I'...
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20 views

Severe graphic artifacts on screen after screensaver!

Note: I tried to use descriptive language, but because I'm uncertain of the problem's underlying details, I'm not necessarily able to use the most accurate and descriptive language. Often, when I ...
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0answers
28 views

After fresh installation of XUbuntu 16.04, US layout on USB keyboard after each reboot

The built-in keyboard of my laptop is connected to the system as a USB device. During installation of XUbuntu 16.04 from the official 64 bit ISO image, I was asked about my keyboard layout. I ...
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45 views

Login screen asks for username after removing and reinstalling lightdm

I have uninstalled lightdm by sudo apt-get remove lightdm by mistake but I installed it again by going to virtual console and using sudo apt-get install lightdm but the problem now I am encountering ...
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5answers
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How do you protect Ubuntu login?

I seem to remember that a few years back, in order to login on Windows you had to type Ctrl-Alt-Del to get a login screen. The advantage of this was that if you had a cat or child that liked to ...
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18 views

How to log in to an account which is hidden from the lightdm login screen? [duplicate]

I followed the accepted answer of How do I hide a particular user from the login screen? (the one about modifying /var/lib/AccountsService/users/USERNAME) to hide the user guest-config from my lightdm ...
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1answer
76 views

Which display manager is used by default in Ubuntu GNOME 16.04?

I can't find this information, and while trying to install the nvidia drivers for my laptop, I got a message explaining that I had 2 display managers installed, and that seemed strange.
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1answer
35 views

How do I change the LightDM unity-greeter wallpaper behavior?

Ubuntu 16.04 x86_64 This is not how to change the login screen wallpaper, or how to stop dynamic wallpaper switching. This is how to set the default behavior from "Scale" (or whatever the current ...
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How do I configure Ubuntu 14.04 LTS such that at the login screen, a brief power button press initiates a clean shutdown?

I have a system that runs an up-to-date Ubuntu 14.04 LTS, with Xfce as the window manager and the default login/session manager. (LightDM with the Unity greeter? It certainly looks very similar to ...
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2answers
50 views

login loop on ubuntu gnome 16.04

I'm stack in login loop on my first account. I can log in with a guest one and for a new one that I created on terminal. This is the log errors, please help me understand what is causing the sigterm.
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39 views

Can't get past LightDM

I don't know exactly what caused this, but I rebooted my Macbook Pro and when I tried to log back in to Ubuntu MATE, it took me back to the login screen. I have tried Fn + Ctrl + Alt on all of the ...
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1answer
200 views

How to set the screen resolution in Ubuntu 16.04 64 bit running under VMware workstation 12 player on a Windows 7 host?

I can set the screen resolution manually once I log in using the following command: xrandr -s 1360x768 but I am not able to make it "stick". Every time I log back in, the resolution for a little ...
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1answer
63 views

Ubuntu gives a purple screen while booting

I have ubuntu 14.04 with Windows 10. It gives the purple ubuntu screen on start up. If I go to the recovery mode and then resume from there, I go on to the login page where it gets into a login loop. ...
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1answer
53 views

Nvidia 361.42 and LightDM problem on xubuntu

I am using xubuntu 16.04 with intel and nvidia GPUs. When using intel there are no problems, when doing prime-select nvidia and logging out lightdm will not start with the error message (see below). ...
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1answer
24 views

Can't login due to kwallet error with nvidia drivers

I have a workstation with 2 nVidia Quadro K620 video cards and 3 monitors. In order to drive all 3 monitors I have to have the nVidia 361.45.11 drivers installed. After applying updates recently, I ...
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61 views

Ubuntu 14.04 login loop with lightdm and gdm black screen

I came to my computer a few days ago and found a login screen. Because I have bypassed the login screen in ubuntu settings, this was very strange. I tried logging in and found that I was in a login ...
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46 views

Lubuntu 16.04 doesn't automatically log in if monitor is not plugged in?

I want the machine to automatically log in so that it can start processes as the main user on boot. I have the settings set to auto login: /etc/lightdm/lightdm.conf [Seat:*] autologin-guest=false ...
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0answers
93 views

Dual monitor setup: one screen works, the other is a blank backlit screen

I have a dual monitor setup, on Ubuntu 15.10, with LightDM. Both monitors connected by HDMI, one connected to my NVidia GPU, and the other connected to my integrated graphics card. I recently ran into ...
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26 views

After login to user account, black screen and no mouse

Super weird bug that's now happened on two completely separate installs (on the same laptop). For a while, everything works great. Then something happens (still not sure what) but I think something ...
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49 views

Difference between lightdm and startx? [closed]

People are referring to starting a GUI Desktop with the command: startx When using the command, nothing works, just displays desktop without menus/toolbar. I use sudo start lightdm And it loads ...
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0answers
20 views

Unable to login in any mode (Admin, Guest , TTY1 TTY3) issues after auto update to 14.04

I had installed Ubuntu 12.0 in my external drive long time back (More than 2 years back). I used to use it to boot up in USB mode on my laptop which is running on Windows7. Over period of time I had ...
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0answers
34 views

Really, really, really strange login behavior

It's a bit hard to describe this problem, but I'll try my best. I recently installed Ubuntu 16.04 on my family's Intel NUC, knowing that it was probably user friendly enough for them to use. ...
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39 views

Can't log in to Unity desktop. Can log in to MATE and XFCE (16.04)

I updated what needed to be updated (required rebooting) and now I can't log in to the Unity desktop, nor the Guest account. I can log in to MATE and XFCE and on TTY1. My account is working. Using ...
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62 views

Kubuntu 16.04. black screen

I'm using KUBUNTU 16.04. After installing light display manager, when booting it goes to a black screen. Thanks.
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37 views

Why is the volume notification showing upon logon?

When logging into Ubuntu 16.04, the login sound of the drums play but for some random reason the volume bar also comes on (on the top right, where its normally placed). The volume bar also suggests ...
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28 views

Mouse pointer missing after suspend / Lenovo X200 / Ultrabase / 2 monitors / Displays configuration issue?

since this problem seems to be recurring throughout distros and versions, I looked it up in most boards and of course [...] <- spare rambling about Google skills here. This did not solve it so far. ...
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146 views

Ubuntu 16.04 login loop wit nvidia GTX 960M

I've been through several questions about login loops with no result for my case. My laptop is a MSI GP62-861XES i7-6700HQ 16GB 1TB GTX960M I've tried with nouveau and several versions of nvidia ...
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2answers
246 views

Autologin with LightDM on Xenial (16.04)

How to setup autologin on Xenial with lighdm from a terminal (i.e. with an editor)? Here is what I currently have done. First I created the conf.d-dir which did not exist on my installation: sudo ...
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35 views

lightdm gdm and slim

I don't have a login screen. Doing sudo service slim start brings me to a login screen which then turns blank. Essentially I do enter my credentials but apparently log into nothing. sudo service ...
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22 views

Lost virtual terminals + low graphics mode

First, I had low graphics mode. I logged into tty1 and realized that i had lost sudo as well. How any of this happened I have no idea. To take back sudo, I did following in root shell using grub ...
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1answer
355 views

Installing Nvidia Graphics drivers on Ubuntu-GNOME 16.04

I am using Ubntu-GNOME 16.04 with GNOME 3.20 When I install Nvidia graphic drivers by sudo apt-get install nvidia-361 , I am facing the following problems. During the installation of Nvidia-361, it ...
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1answer
104 views

How to disable ATI discreet 16.04 LTS

I'd like to save battery by disabling the ATI discreet graphics in 16.04 LTS, and use only my default power-saving onboard Intel. Could someone guide me step by step accurately through the process? I'...
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39 views

Boot process stopped after installing gdm

I have installed gdm to replace lightdm, but after rebooting, I am greeted by a black screen. Switching to another TTY, shows me the following message: A start job is running for Hold until boot ...
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308 views

SLOW Boot and Login times Ubuntu 16.04

Ubuntu 16.04 64 bit taking around 20 sec from Login screen to desktop and around 20 seconds from grub to login screen, tell me which services i can safely disable, i do not use virtualbox and ...
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2answers
215 views
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1answer
104 views

Running a bash script from an xsession to toggle startup programs

So I've got an interesting challenge in front of me, running Ubuntu 16.04. I originally created a .xsession file that ran Exec=google-chrome --kiosk http://some-url.com to boot as a kiosk device. ...
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1answer
52 views

Question about Kodibuntu auto-login default session location? [closed]

My apologies for mistakes in terminology. I only know enough to be dangerous. OK so I'm running live USB Kodibuntu. I have a casper-rw which keeps data from session to session. The OS automatically ...
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1answer
136 views

Upgrade from 15.10 to 16.04 now Simple Desktop Display Manager (SDDM) won't start

After upgrading from Ubuntu 15.10 to 16.04 via do-release-upgrade I can now only boot into TTY mode. The boot log shows: [FAILED] Failed to start Simple Desktop Display Manager. See 'systemctl status ...
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86 views

Plymouth to LightDM smooth transition

I have set the grub background, plymouth splash background and desktop wallpaper all to the same image just to give a more uniform boot process. The only issue I have now is the transition from ...
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22 views

Ubuntu virtual terminal exits too quickly for me to type

I've been having a nightmare trying to install an NVIDIA GPU on my desktop computer (Ubuntu 14.04). I inserted the card and tried following various instructions online, but that did not work and I got ...
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1answer
57 views

How do you use the TTY (without X server) on one screen, and X on the other?

While playing around with Ubuntu, I turned off the window manager. Unable to operate the terminal in xserver, I jumped over to a bash command line (Ctrl-Alt-F1), and relaunched lightdm. After having ...
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1answer
62 views

How to make Greeter/Login Wallpaper Match Desktop Wallpaper

So the default behavior of the Ubuntu login screen was that it would match match my Desktop wallpaper. So for example, if I was on the login screen and I clicked between my username and the Guest user,...