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

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2answers
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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 ...
3
votes
1answer
213 views

After latest update for 14.04, cannot log in to any user account

I just updated 14.04 to latest patches using the GUI: software update. After that, a restart was required, and now cannot log into any of my accounts. I am sure the passwrds are all correct, it just ...
3
votes
1answer
5k 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 ...
3
votes
4answers
3k views

Not able to login through GUI in Ubuntu 12.04

I'm unable to login through GUI. On typing the correct password, I get a black screen and back to login screen. However, when tried with tty1 I was logged in. Then I tried reinstalling lightdm and ...
3
votes
2answers
2k views

How can I revert ubuntu settings after gnome-shell install

I have Ubuntu 13.04 32 bit. Recently, I installed Gnome 3 because I wanted to try something new. It looked and felt awful, so I removed it via ppa-purge. Unfortunately, some of my setting were ...
3
votes
1answer
970 views

Is it possible to use auto-login in Lightdm even with encrypted home?

Configuring the auto-login in lightdm is possible as answered here. I tried but, still I'm not able to auto-login. It seems as I haven't configured auto-login. Is this because my home folder is ...
3
votes
1answer
4k views

How to adjust DPI in 14.04

I asked about fixing DPI in 12.04. The 14.04 release notes list "Support for High-DPI screens and desktop scaling." Post upgrade, it seems that nothing has changed. Similar symptoms from my previous ...
3
votes
1answer
3k views

How to disable shutdown/reboot from lightdm in 14.04?

In 12.04 it was possible to prevent system shutdown or reboot from the login screen by adding the following restrictions in /etc/polkit-1/localauthority/50-local.d (adapted from here): [Disable ...
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votes
2answers
498 views

13.10: Can't log in

So I've tried just about every fix I could find out there, but I still can't log in to my account. When I enter the correct password, the screen goes black for about a second, the cursor disappears, ...
3
votes
1answer
3k views

Black Screen on Login 12.04.3

I've recently installed a fresh version of Ubuntu 12.04.3 Desktop. At login screen, everything is black except for my mouse cursor and blinking underscore at top left. I can hear the Ubuntu startup ...
3
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2answers
2k views

x-server won't start - black screen (after purging *nvidia* files on HD4000 system)

For about three months now I've been trying to fix a problem with my x-server. The problem occured after lightdm starts as usual. After entering the password to my account the loading-screen showed ...
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votes
2answers
1k views

Xubuntu LightDM shows blank screen half the time [closed]

System info: (will be amended if any more info is asked for) My laptop runs Xubuntu 12.10. As it has a Solid State Drive, /tmp, /var/tmp, /var/log and /var/log/apt are set to tmpfs in the /etc/fstab ...
3
votes
1answer
420 views

How to run python script at login screen?

I use a python script to set brightness to zero. #!/usr/bin/python import dbus bus = dbus.SessionBus() proxy = bus.get_object('org.gnome.SettingsDaemon', ...
3
votes
1answer
652 views

Cannot restart Ubuntu after replacing Unity with Gnome and purging lightdm

I am running Ubuntu 11.10. I used the directions here to replace Unity with Gnome. It seemed to work fine until the end of step 2 when I rebooted the computer. When I chose the default option, I just ...
3
votes
1answer
4k views

LightDM not responding to XDMCP requests 12.04 LTS

Since a recent upgrade from 10.04 LTS to 12.04 LTS I can no longer login using XDMCP (ssh -XC is okay). This is similar to an earlier question but the answer (add xserver-allow-tcp=true) didn't help ...
3
votes
1answer
932 views

Working around Active Directory Users

In my office system, Ubuntu is configured for Active Directory authentication with Windows using likewise open. I have three issues. Each time when I switch on my system and some times when I ...
3
votes
1answer
1k views

Once authenticated once, passwords are cached in lightdm

We are preparing 12.04 LTS for our userbase and have done some basic configuration to the login screen (disabled guest account, removed user list, etc). However, one thing that I've noticed is that ...
3
votes
1answer
680 views

LightDM run desktop for one session “This session Only”

I sometimes experiment with many different desktop environments, some of which can be unstable. I have had a few times where I needed to drop into root shell, disable auto login, then log into my ...
3
votes
1answer
754 views

No login screen after logout

this is my first question about Ubuntu :) Since this morning when I log out (top right icon, log out) I don't get the usual GUI login screen but I get this instead: If I log in with the Ubuntu 2D ...
3
votes
1answer
241 views

No Unity session after update

After I updated Ubuntu 11.10, LightDM won't show the Unity entry anymore. What can I do, to get the Unity (3D) entry back? NV drivers are fully working. I installed Gnome 3 weeks before.
3
votes
1answer
89 views

Which application is responsible for accepting passwords when entered in diffrent keyboard layout?

I just noticed that when I'm prompted to enter my password to unlock the system, no matter what layout I choose (Persian or English) as long as I press same buttons that resembles my password in US ...
3
votes
3answers
533 views

Is it possible to log in as another user within an already-running session?

Is it possible to log in as another user within an already-running session in Ubuntu 11.10 (as it was with Xephyr or Xnest under GDM)?
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0answers
53 views

No login screen on startup, works after logging in and logging out again

I installed Ubuntu on a client's computer. At first - no issue, but after some updates and installs (including burg, which was not the problem as the problem remained after removing it, I could not ...
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0answers
46 views

Unknown xubuntu screen locker / password

I have a regular ubuntu installation which I then installed xubuntu desktop over. I am occasionally confounded though by an unknown "screen locker" that occasionally appears instead of my normal ...
3
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0answers
734 views

Ubuntu 15.04 boot hangs on “Starting light display manager” after updates

I have recently taken the plunge to Ubuntu, and purchased the Dell XPS 13 Developer Edition. My first order of business was to wipe the "Dellbuntu" that came pre-installed and do a fresh install of ...
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0answers
128 views

How can I start a LightDM session via SSH?

I'm connected to an Ubuntu 14.04 machine via SSH and I want to start the lightdm session for testing purposes. I don't want to forward the X server to my local machine. I just want to start the ...
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0answers
153 views

Lock screen asks for password on no-password account

The Ubuntu lock screen always asks for a password even when the account does not have password. In my opinion, it should be exactly like the login screen: a button "connect >" for accounts that don't ...
3
votes
1answer
451 views

Ubuntu 14.04, Nvidia Driver 304.117 for 7600GT

I have a clean new installation on an SSD Drive of Ubuntu 14.04 with NVidia Driver 304.117 running. After (very quick) boot I can hear that the login screen has started but no picture on my F-HD ...
3
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2answers
2k views

Start another GUI on different TTY

For some reason I want to have 2 GUIs open at different TTYs. the commands sudo service lightdm stop/start will stop/create a new GUI at TTY7. but how can I do the same at different TTYs or ...
3
votes
1answer
245 views

Lightdm crashes at seemingly random intervals

I installed ubuntu 12.04 LTS around a month ago, and it's a great experience. Except for one thing: Lightdm crashes at seemingly random times, on average 2 times on a normal working day. I have no ...
3
votes
0answers
243 views

After Upgrade from 13.04 to 13.10 missing user in login screen

I have upgraded to 13.10 from 13.04 now after booting (even after updates and rebooting) my user id is not listed. It has a uid higher than the minimum in lightdm.conf. I have the user light display ...
3
votes
0answers
548 views

How do I disable the guest session in Ubuntu 13.10? [duplicate]

With Ubuntu 13.10 this question on how to disable the guest session no longer works because I think the lightdm config files have changed in Ubuntu 13.10. I know you used to have to add the line ...
3
votes
2answers
3k 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). ...
3
votes
0answers
383 views

Xubuntu: How can I avoid the double-password entry (lightdm then xscreensaver) on user switching?

I'm running Xubuntu raring with lightdm and xscreensaver. Both users on the system have xscreensaver set to lock the screen after n minutes. However, when I click "switch user" (or do gdmflexiserver ...
3
votes
1answer
799 views

Choose lightdm login screen location in multi monitor setup

How can I set the location for the login screen with lightdm in a multi monitor setup. If have two monitors (1920x1080) + (1920x1200) and currently after I boot the login is shown on the left ...
3
votes
0answers
470 views

Lightdm not working at all since bumblebee install!

I'm relatively new to Ubuntu, so please excuse me if my question is stupid... So a few weeks ago, I bought a Gigabyte U2442N with Optimus Graphics (a 640M and a HD4000). I installed the stable ...
3
votes
0answers
427 views

How to get 12.04's login screen (lightdm) to display the shutdown menu like 10.04 when the computer's physical power button is pressed?

In Ubuntu 10.04 while at the login screen (gdm), when the computer's physical power button was pressed a screen popped up that offered options on shutting down the system (shutdown, restart, cancel, ...
3
votes
1answer
3k views

How to configure permanent autologin? [duplicate]

Possible Duplicate: How do I enable auto-login in LightDM? How to permanently disable LightDM greeter and enable autologin? I'm trying to set up an Ubuntu 12.04 machine as a kiosk and I ...
3
votes
4answers
969 views

Multiple Users, Single Workstation, 1 home folder (Can this be achieved, if so how?)

I am setting up a single workstation (kiosk) in my local library for a team of genealogy researchers (approx 12-14). I plan to use Ubuntu 12.04 LTS as the OS. Each user must have a unique user ID ...
3
votes
1answer
556 views

Lost gtk theme style in login screen after Compiz crashed

Normally, all controls in login screen (button, textbox, etc..) have the current gtk-theme style. But after Compiz crashed (always happen when I enable or disable a plugin), the style has gone (no ...
3
votes
1answer
598 views

How can I get the computer to sleep while at the login screen? (No users logged in.)

I have my computer set to "Suspend when inactive for 30 minutes" in system settings. This function works fine if a user is logged in and does not do anything for 30 minutes. However, if all users are ...
3
votes
2answers
1k views

User login cycles [duplicate]

Just install 12.04-64bit and while I can login using the guest login, I cannot with my user login: it just cycles back to the login screen. I have performed the sequence of apt-get update/upgrade and ...
3
votes
1answer
2k views

Low graphics mode error on startup with NVIDIA graphics (12.04 LTS )

My problem is similar to two other posts concerning ATI cards and 12.04 LTS: Post1 & Post2. In my case I use a Dell Precision M4300 laptop which uses a NVidia Quadro FX 880M. Doing a lspci | grep ...
3
votes
0answers
1k views

How can I make the LightDM lock screen my gnome-shell lock screen in 12.04 [closed]

In Unity, LightDM is the default lock screen. Is it possible to make LightDM my default lock screen in gnome-shell ?
3
votes
1answer
520 views

Login screen is rotated [closed]

When I turn on the computer, the login screen is rotated. But when I log in to my account, the screen is normal. I have an ATI graphics card on an AMD laptop. The settings is normal for two user ...
3
votes
0answers
329 views

After upgrading from 11.04 to 11.10, gnome-shell entry in Lightdm actually launched Unity [closed]

I had Ubuntu 11.04 installed running gnome 2. I upgraded to 11.10 and everything went very smoothly. I installed GNOME Shell via: sudo aptitude install gnome-shell Logging into the Gnome session ...
3
votes
1answer
1k views

How to remove the old gdm [duplicate]

Possible Duplicate: How can I make LightDM the default display manager? I have installed Ubuntu 11.10 beta and all of its changes are now working and let me testing them, but the only ...
2
votes
2answers
882 views

Is it possible to run ChromiumOS as a session?

Is it possible to install ChromiumOS within Ubuntu? I am NOT looking for dual boot. I want to use as a session like unity or gnome-shell. Please let me know if anyone has tried it.
2
votes
4answers
7k views

12.04: LightDM freezes while “Logging in…” - maybe due to deactivated login sound [closed]

good morning, lightdm freezes often after I entered my passwort. It hangs exactly saying "logging in...". It's no total system breakdown though. I found out that there is already an existing bug ...
2
votes
5answers
7k views

Ubuntu 13.04 - can't login to Unity, keep going back to login screen with all users

today I've updated openssl and libssl (automatic update). After reboot I can't login with any user (even with Guest or new one) into X. I've tried with installing gdm, gnome-session-fallback - no ...