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

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GUI login problems in Ubuntu 14.04LTS

my problem is very similar to that presented here: Ubuntu gets stuck in a Login Loop I am using Ubuntu 14.04 LTS. I can enter my account in GUI just for 1-2 seconds after that I am returned back to ...
6
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1answer
17k views

How can I restart Unity/GDM when I get a blank screen after suspend?

Occasionally, with Ubuntu 12.04, I get a blank screen when I resume from suspend. I can see the mouse cursor, but that's all. I can get TTY terminals, so is there a way to restart the graphical ...
1
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0answers
203 views

LightDM will not start & xserver problems Ubuntu 12.04

I've been having an issue with resume after suspend for the past week and a half or so. After waking up the lock screen would be displayed, but I would not be able to type in my password. My ...
4
votes
1answer
500 views

Run a script with user interaction on log out / shutdown?

I'd like to run a script on shut down, which interrupts the logout process and and pops up a window with zenity. My target is to get autofsck working with lightdm. It seems to work with 12.04 after ...
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0answers
15 views

No Login Screen on Warm Boot: How to compare logs when I can't log in?

I have a question that is tied to a previous issue and looking specifically for how to troubleshoot: LightDM won't start after Grub - Cannot Access TTY unless closing and re-opening lid I have ...
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0answers
12 views

Ubuntu 13.10 not logging in [duplicate]

I am using ubuntu 13.10 on my dell inspiron laptop since last year.It was working fine. But now when i try to login with my account,it just blinks of a second and again login screen is shown.My guest ...
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0answers
16 views

Chrubuntu 12.04 Desktop Won't Load

I'm on a Lenovo X131e Chromebook. Upon start up I am able to move the mouse pointer around a black screen with a blinking text cursor in the top corner. If I switch to a terminal and then try to ...
3
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3answers
10k views

(13.04) lightdm crashing - black screen flashing cursor

I am using the 13.04 x64 release of Ubuntu on my PC and at least it works so far as it should. But suddenly the lightdm crashes during boot and even if I try to start it manually from terminal after ...
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0answers
1k views

Ubuntu 12.04 Unity: Black screen with cursor only, when external display is connected before booting laptop

Whenever I connect an external display to the DSub port of my laptop before booting into Ubuntu, something goes wrong in Unity to cause the exact same problem as described here: After logging in, ...
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0answers
45 views

Unity - desktop has stopped working after Unwanted Nvidia display driver update

My computer has an Intel i3 processor and no other inbuilt GPU. However, the nvidia-* latest got installed on the computer during an update process. I used sudo apt-get remove nvidia-* to remove all ...
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0answers
62 views

Ubuntu 14.04 stuck in login after upgrade

After upgrading from 12.04 to 14.04, I'm not able to login anymore (guest account doesn't work too); there's a loop (it goes back to the login). What should I do? I've already read Ubuntu gets stuck ...
27
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6answers
90k 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
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2answers
32 views

How to change Ubuntu login screen background without dconf-editor?

I am trying to change the Ubuntu login background which should be the same as the wallpaper, without installing dconf-editor or additional software. Is is possible?
0
votes
1answer
33 views

Lightdm-gtk-greeter centre image

I use lightdm with lightdm-gtk-greeter. Is it possible to modify the greeter so the login screen will centre a wallpaper image that is smaller than the screen? The image I use gets stretched to fill ...
0
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0answers
26 views

Ubuntu 12.04 in login loop as lightdm-session says upstart not found

I tried to install a package systemd (this replaces upstart in Utopic 14.10 and up). See my yesterday question How to Re Generate All Gnome Schemas for Ubuntu 12.04. The result was that it didn't ...
0
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1answer
21 views

error opening display after lightdm stop

I'm trying to install CUDA and following these instructions. Eventually I get to a point where I need to run: sudo service lightdm stop At that point the GUI shuts down but instead of a terminal ...
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0answers
21 views

Xubuntu and Ubuntu's display managers coexisting

I'm running Ubuntu 14.04. I installed Xfce via the 'xubuntu-desktop' package to try it out. After a couple days I decided to get back to Unity so I removed it and several other packages it came with. ...
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2answers
3k views

Upgrade to 13.04, user picture shows up on lightdm. Can I change it?

So, I recently upgraded my Xubuntu to 13.04, and afterwards I noticed that there is now a picture of me on the lightdm login screen. I have no idea where this picture came from, I don't remember it ...
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0answers
11 views

LightDM does not ask for login password

I have an auto-logged in non-sudo user called "screen". I have a passwordless sudo but login-protected user called "support". I'm pretty sure this was working fine before, somehow maybe the latest ...
0
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1answer
3k views

No desktop appears after loged in using XDMCP

I just installed a test machine with Ubuntu LTS 14.04 and I went to configure the XDMCP access and found that the file /etc/lightdm/lightdm.conf is not there anymore. In Google I found that now it is ...
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1answer
112 views

How can I make lightdm scale on a hidpi screen?

I have a laptop with a 3200x1800 screen. When I start up my laptop, lightdm doesn't scale to the resolution and looks tiny. When I lock the screen afterwards, lightdm scales and looks fine. I found ...
2
votes
0answers
24 views

When I turn my monitor on after it has been off, it does not display anything

I am running Xubuntu 14.10 on a desktop and use LightDM. As I said in the title after I turn off my monitor (with the computer already on) and then turn it back on again there is no input from my ...
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0answers
49 views

Getting a blank screen with the mouse pointer when I re-login

I'm using an HP G62 laptop with Intel HD Graphics card and an Intel i3 Quad-core processor. When I first boot my laptop, I can login just fine and work with the system. The problem begins when I ...
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0answers
187 views

Close Lightdm in Ubuntu 12.04

Should I install the official NVIDIA drivers for my NVIDIA 8200? When I start the installation, it asks me to close the xserver. Only way to close it is to run the command : sudo service lightdm ...
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0answers
54 views

lightdm multiple virtual terminals single seat

LightDM configuration semantics for multiple seats seem to have changed in Ubuntu 14.10. More, it seems there has always been ambiguity regarding whether multiple seats necessarily means separate ...
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0answers
40 views

14.04 : Cinnamon goes straight to Fallback on Nvidia card after reboot

A couple of days ago I did an update on my machine. apt-get update After the update proceeded I rebooted the machine and tried to log into cinnamon. Straight after the login I get a message saying ...
1
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1answer
306 views

How can I change the KDE lockscreen?

I want gdm, lightdm, something--anything--other than the default one in KDE. I'm not talking about the login manager or anything, that I have set to gdm. I'm talking about the lock screen with the ...
6
votes
5answers
3k views

rotated monitor. login screen needs rotation

I rotated my screen, an once I login, it works fine. but, the greeter (login) screen hasn't got the message that things are rotated 90 degrees. How can i change the rotation of the login screen? ...
17
votes
1answer
25k views

How do I make GDM the default display manager?

I believe my question says what I am trying to achieve. Steps I tried to make gdm my default display manager: sudo dpkg-reconfigure than select gdm as my default. Edit ...
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1answer
45 views

Xubuntu 12.04 desktop won't start

My computer started hanging on the greeter screen. I cannot start a local X session, but can still select rescue from GRUB and boot to a tty. In addition sshd and the xrdp server seem to work normally ...
0
votes
0answers
57 views

Kubuntu 14.10: after 12 Dec 2014 update X doesn't start

After the update X doesn't start complaining a not valid xorg.conf file As a workaround at every reboot I do: sudo rm /etc/X11/xorg.conf sudo startx I also opened this bug: ...
0
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0answers
31 views

Configure and run indicator-sysmonitor on boot at login prompt

I want to use indicator-sysmonitor to display an indicator showing that the network connection is up amongst other things immediately at boot on the lightdm login screen. I followed these steps to ...
2
votes
0answers
41 views

Can this error cause computer to reboot

There are 11 computers in my classroom. Yesterday they began to reboot randomly, all of them. I reinstalled Ubuntu and got this error everytime. Also, after reinstalling the rebooting continued. Can ...
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0answers
14 views

How to change screen locker in KDE?

Recently I start using lightdm in pair with google authenticator for two-step authentication. All works fine, but default screen locker in KDE doesn't configured to use 2-step auth. So, I want to ...
5
votes
1answer
4k views

How do I enable the user dynamic wallpaper in the login screen of Ubuntu 13.04? [duplicate]

Ubuntu 12.04 Unity greeter had introduced the selected user dynamic wallpaper which allowed, when selecting a user from the available users list in the login screen, the wallpaper to change to reflect ...
4
votes
5answers
11k views

Unable to start lightdm but can startx

I am trying to make my own Live USB and I have successfully generated an ISO file with a newly installed, configured and customized Xubuntu 12.04 LTS installation. My problem is that, no matter I ...
2
votes
2answers
453 views

How can I use custom wallpapers for the login screen?

I recently Installed 12.10 version and I loved it! But the there's something weird with Wallpapers. As long as I use a wallpaper from the /usr/share/backgrounds folder (I use the "appearance" dialog ...
4
votes
2answers
5k 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 ...
2
votes
4answers
16k views

/etc/lightdm/unity-greeter.conf file missing

I have no /etc/lightdm/unity-greeter.conf file. but there is /etc/lightdm/lightdm.conf and /etc/lightdm/users.conf but there isn't a background=path/to/image line in either of those files. Related: ...
2
votes
2answers
6k views

Unity greeter does not display custom wallpaper

I am using Ubuntu 14.04 LTS 64 bit . I know this question has popped up many times but I want to make it very clear that none of the posts helped me a bit. my Problem: I am unable to get my custom ...
0
votes
1answer
24 views

Cannot change GTK and icon after changing LightDM greeter

I changed my LightDM greeter and suddenly I cannot change my gtk or icon theme. The dconf settings are there, but the system is not responding to changes, nor are the themes being used by all ...
1
vote
0answers
185 views

14.04_x64 / Nvidia GT 240 , HUGE font notificaton at greeter and in naulitus after log-in

I've been using 12.04 for a long time - excellent version indeed, I decided to try 14.04 today. Installing without any problems. My VGA is Nvidia GT240 (legacy one), Nouveau display driver is fine, ...
0
votes
0answers
10 views

How to get Plasma Next option in Login

I installed Plasma Next on Kubuntu 14.10 and chose lightdm. Upon restart I'm not getting option to chose KDE Plasma Workspace/Unity/Plasma Next as my Desktop Environment. It directly enters Unity. ...
0
votes
0answers
23 views

Errors with Encryption Keyring and X when Booting in Ubuntu 14.04

I am running Ubuntu 14.04 and I know all of my passwords, but I'm having trouble logging in and error messages I've Googled have not led me to a solution. When I came home the desktop on my laptop ...
0
votes
1answer
167 views

fix “The system is running in low-graphics mode” error without internet

I'm very sorry for asking about this error in another question but all the solutions in here require for you to have internet. I only have wireless internet and when I am in that console the internet ...
0
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2answers
296 views

What to do when nothing seems to fix Ubuntu 14.10 stuck after log in?

So I run Ubuntu 14.10 on HP Pavilion g6, i5 and with Radeon HD6500. Yesterday Ubuntu crashed and since then I can't get anyfurther than the log in screen. Ubuntu simply stucks with only the background ...
0
votes
1answer
36 views

Unity has disappeared from lightdm after updating gnome-shell

This morning I ran sudo apt-get upgrade and it prompted me to update gnome-shell. I never really use the gnome desktop environment, but I figured I might as well keep it up-to-date. After restarting ...
2
votes
3answers
1k views

How can I make a Multiseat with Xephyr?

I'm trying to use multiseat with Ubuntu, but I can't make this work. I've read a lot of "how to", and the most of them are about doing a multiseat with some distro with GDM2, or KDM. But, I'm using ...
0
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0answers
71 views

nvidia and intel low-graphics mode error

I have ubuntu 14.04.1 64bit installed with intel and nvidia video cards . I'm was using xorg-edgers ppa to graphics drivers . Today i got an update for the drivers (i think it was the mesa drivers) . ...
0
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0answers
17 views

Restore notification style in Unity after installing Lubuntu

I installed kubuntu-desktop on my 14.10 ubuntu system. I managed to use update-alternative to set plymouth, and configured lightdm to get the default ubuntu look. The only problem that remain is that ...