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

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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
13 views

Question about Kodibuntu auto-login default session location?

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
16 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. ...
1
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1answer
21 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 ...
4
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2answers
7k views

How to fix Ubuntu 14.04 LTS login screen hangs with “logging in…”

Anyone have suggestions for this: I upgraded my Ubuntu system to 14.04, and the upgrade failed miserably. I was forced to restart the system in order to get to a login. After following several ...
0
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0answers
17 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 ...
1
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1answer
39 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 ...
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3answers
5k views

How to get Pantheon Greeter on Ubuntu 14.04 instead of Unity Greeter

I'm running Ubuntu 14.04, how can I replace the lockscreen with the one on Elementary Luna (Pantheon-Greeter). Thank You!! Edit: Can anyone do it and confirm it works completely?
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0answers
17 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 ...
31
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13answers
59k views

Wrong Login Screen Resolution

Excuse me if this has been answered already, but I couldn't find any questions quite matching my issue. On the odd occasion, usually after incorrectly restarting my computer, my login screen ...
0
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0answers
23 views

How to add Unity option to Kubuntu login screen?

I have installed Kubuntu on a machine, and decided to install a few desktops so I can change depending on my mood. However, when I ran sudo apt-get install unity, it installed fine, but when it ...
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0answers
98 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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0answers
24 views

How to boot desktop into text mode [duplicate]

Is it possible to have a DE which only opens the terminal, like the way it is on an ubuntu server distro?
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3answers
5k views

Need restart lightdm at every startup - console login screen

Everytime I boot up my ubuntu 12.10, I get a black console screen. I need to login in tty, and restart lightdm : sudo service lightdm restart Then the GUI lightdm login screen appears as expected. ...
3
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2answers
8k views

I have to restart lightdm after run

After starting the system, i've a black screen (without any screen backlight), then i have to switch to tty6 (ctrl+alt+f6), login and restart the lightdm: sudo service lightdm restart I'm using ...
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0answers
38 views

lightdm and gdm not working in Ubuntu 14.04

I have a problem with Ubuntu 14.04, the graphical mode can't started in the log screen : starting LightDM display manager [fail] then I tried to use gdm, starting gnome display manager fail, i don't ...
33
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6answers
302k views

How does one exit the X server?

The command sudo service gdm stop would successfully disable the X server in Ubuntu 11.04 temporarily. However, this same command no longer works in Ubuntu 11.10, because "gdm" is an "unrecognized ...
4
votes
2answers
7k 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 ...
0
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1answer
347 views

Ubuntu 16.04 stuck at LightDM login screen

So I just installed Ubuntu 16.04 yesterday. Today I wanted to login to the computer and suddenly it doesn't log me in anymore. I can enter my password, but when I hit return to log in the screen goes ...
0
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0answers
53 views

Ubuntu 14.04 login loop Unity terminated with status 1

I have ubuntu 14.04 and am stuck in a login loop problem despite trying the common answers to the multitude of questions on the site ,none have worked. I can't figure out what's wrong and would be ...
0
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0answers
86 views

Need script to logout after 20 minute idle time and then auto login

I have a public internet terminal at my workplace. Often, users will simply walk away from the machine without logging out (of email, facebook, etc.) -- I want to make the end-user experience more ...
0
votes
1answer
66 views

What file or setting controls user backgrounds in unity-greeter?

Ubuntu 16.04 LTS Xenial The unity-greeter background image for my user stopped inheriting my Unity desktop background. Whatever image I use, it is still stuck on Flora... Selecting guest user changes ...
0
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1answer
516 views

Ubuntu 16 Stuck in Login Loop after Installing Nvidia 364 Drivers

This didn't start out as a problem with the login loop. I was attempting a clean install of Ubuntu 16 and using the new feature that allows it to detect proprietary drivers for me. I started off ...
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6answers
5k views

Can't get nVidia drivers working with 16.04, logs out right after login

I have installed Ubuntu 16.04 beta 2 on Monday, Apr 18th. When I try to install nvidia-current, nvidia-361 or the version that jockey installs, either lightdm fails to start entirely or I can't get ...
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1answer
72 views

Login Loop for Guest Account only on 16.04

I have some 40 Dell Latitude E6410s I maintain in my classroom for student use. I have successfully setup and used special 'guest' accounts so the directories are wiped between uses. This scheme ...
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0answers
29 views

Cannot login after suspend with multiple monitors

Since I attached an external monitor to my laptop I'm no longer able to login when resuming from suspend. LightDM appears on both screens and shows my name in the login box, but the password field is ...
0
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1answer
13 views

fixing things from a LiveBoot session

I switched from LightDM to something else when I was messing with my system late at night. When I rebooted, the screen went black. I'm currently booted from Bhodi Linux on a flash drive, and am ...
6
votes
5answers
5k views

xhost setting at boot

I am able to set xhost at boot in Fedora by editing /etc/gdm/Init/Default and for example add: /usr/bin/xhost +local: How can similar be done in Ubuntu? I want that the /usr/bin/xhost +local: ...
185
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40answers
540k views

How to fix “The system is running in low-graphics mode” error?

Note: This is an attempt to create a canonical question that covers all instances of "low-graphics mode" error that occurs to a user, including but not limited to installation of wrong ...
1
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2answers
6k 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
4k views

MDM doesn't automatically start

I just successfully installed mdm on 13.04 with this guide, replacing but not uninstalling lightdm: How can I replace LightDM with "MDM"?. However, when I first rebooted, I just got a blank ...
1
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0answers
33 views

Scripting dconf changes

I've written a simple script for our Ubuntu machines at college which sets some dconf overrides to set the theme, background etc. However I cannot seem to get it to correctly set the login screen ...
0
votes
1answer
167 views

x11vnc and lightdm on headless 16.04

I need to access a remote xenial machine with x11vnc sudo apt-get install lightdm x11vnc installed the necessary parts. Then, I created a password with sudo x11vnc -storepasswd yourVNCpasswordHERE ...
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4answers
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How do I enable the “Other” user for login with Active Directory?

So I work at a university using active directory, and in my office there are a few computers that I've set up, in Ubuntu 11.10, to log as an AD user. In order to log in a person just needs to use ...
0
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0answers
98 views

Ubuntu 15.10 to 16.04 and lightdm display-setup-script: can't connect x server

After upgrading from 15.10 to 16.04 my lightdm.conf command has caused black screen on boot, never reaching the login screen: display-setup-script=xrandr --output DP2 --auto --primary --output HDMI3 ...
12
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4answers
24k views

How to disable lightdm?

I want to disable lightdm from autostart. Currenty, I run service lightdm disable from terminal, then run startx. update-rc.d doesnt help
0
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1answer
24 views

Not asking for password in GUI for login even when there is a password set in Ubuntu 14.04

I have a user which has no sudo rights. I have set the password for the user using cli. But when I logout and try to login again, the user is not asked for a passord and logs in as soon as the ...
0
votes
0answers
18 views

Can't find session 'default' for desktop log in

I have a puzzling issue on a newly installed 14.04.4 LTS. I configured it for nis and it works when I ssh into the machine. But if a user tries to log in on the desktop it fails with the "Can't start ...
0
votes
0answers
13 views

How can i set xscreensaver to work directly from lightdm login screen?

Trying here to enable xscreensaver to work directly from lightdm login screen. It's currently work only from a logged session, when it is on login screen when time pass, it blanks out the screen, ...
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0answers
26 views

Using lightdm webkit greeter in 14.04

All guides indicate I need to change a setting in /etc/lightdm/lightdm.conf, and that's how I did it last time, but there seems to have been some changes since that was written. lightdm.conf doesn't ...
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0answers
160 views

Cannot switch to Gnome on 16.04

I just installed Ubuntu 16.04. I have it already on my laptop with Gnome 3.20 working. My desktop pc has an i7 4790 and AMD HD 7950 installed the Gnome 3.20 and rebooted. Now I have the icon to switch ...
0
votes
0answers
38 views

Two graphics drivers at the same time?

I have an Intel integrated graphics card "Intel cooperation skylake integrated graphics (rev 06)" and an Nvidia GTX 960m on my laptop. I wanted to use the skylake integrated graphics card for my ...
0
votes
0answers
30 views

Can not login .XAuthority seems broken

I know that this is a common error and I have read many threads in this regard. I get to the logon screen and type in my pw and it hangs for 20 seconds or so and then displays the log screen again. ...
5
votes
1answer
68 views

how to force DPI settings in Xenial?

Is it possible at all to force a specific DPI settings in Ubuntu Xenial? Recipes mentioned in Can I pass a dpi flag to lightdm to set the proper DPI for X? don't work anymore: I can successfully ...
0
votes
1answer
80 views

Takes a very long time to log in to gnome 3.18.4 in Ubuntu 16.04

I just installed Ubuntu 16.04 via update from 14.04. I'm using gnome-shell 3.18.4. When I want to log to my gnome shell session the login is very slow, it takes more than 1 minute where the the only ...
2
votes
1answer
2k views

Black screen after 15.10 upgrade, not even getting into tty1 anymore

I'm using Ubuntu 15.04 and upgraded to 15.10 tonight. After restarting I'm getting a black screen with a flickering message from my window manager. First I was able to get into tty1, so I ...
37
votes
7answers
140k views

How to change the LightDM theme/greeter?

I downloaded a couple greeters for LightDM, but I have not figured out how to enable them. Is there a way to switch greeter, either by graphical or command-line method?. I do not intend to change ...
0
votes
0answers
38 views

Login problem after Hibernate with Dell E7440

Yesterday I installed Xubuntu 16.04. It uses the lightdm display manager to log in. This works. The issue: I use a Dell Latitude E7440 with Docking station. Most of the time, the screen of the ...
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2answers
354 views

16.04: lightdm(lockscreen) can't connect to wifi. (1) Insufficient privileges

After upgrading to 16.04 (clean install) from 14.04, (so not really upgrading, but you get the point) I notice that lightdm with unity-greeter can't connect to WiFi with network-manager. I get the ...