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

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Black Screen with Cursor on boot

I've only installed Ubuntu today.. I have booted into it many times but now it's showing up with a Black screen and a cursor. This happened after I tried to change my login screen to the LightDM ...
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1answer
9 views

Blank screen with blinking cursor after running xdiagnose

I have had this problem twice in a row trying to follow these instructions: Solution for low screen resolution in Ubuntu 14.04, Ubuntu I have installed Ubuntu 15.04, and had everything running okay ...
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2answers
17 views

Why has lightdm-remote-session been removed from Ubuntu 15.04?

Straightforward question, really. I must admit I haven't used it much, but just recently had started doing. Now it's not in the repositories. What's the thinking behind that?
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0answers
12 views

Nvidia driver suppresses live lightdm

I had a fresh installation of ubuntu 14.04, and I need nvidia drivers to normally handle my screen, otherwise, the screen displays random dots and slashes. When I got nvidia-current, my screen ran ...
94
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22answers
129k views

Ubuntu gets stuck in a login loop

My problem: As you can guess my Ubuntu is stuck in a login loop when trying to enter my desktop. When I login, the screen gets black and soon after that the login screen comes back. I'm a Ubuntu ...
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3answers
19k views

How do I set the GNOME Classic login to be the default with autologin?

I changed to gnome classic fallback, I auto-login but it defaults to unity 3d, how do I make auto-login default to gnome classic?
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2answers
27 views

How to start Pantheon from the command line

Long story as to why I've chosen to go this route, but I've installed Ubuntu Trusty without a desktop, and then installed pantheon, pantheon-shell, pantheon-greeter and elementary-desktop packages. ...
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1answer
508 views

(Solved) Login Loop - unable to run unity - not Xauthority ownership but may be related to display?

All, I was trying to get VNC working, making lots of changes that I don't recall now when I discovered after a restart that I could not login to Ubuntu 14.04. I believe I authenticate ok, but get ...
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2answers
74 views

Trouble Installing Nvidia Driver

First time user here; Just installed Ubuntu 14.04 and I am currently desperate to install 970 Nvidia Drivers. It gives me an error saying that X server is currently running and needs to be stopped, ...
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0answers
30 views

How can i set different wallpapers for Ubuntu 15.04 login and Desktop

This has been bothering me very much. i have memory that Ubuntu 12.04 had this configuration? am i wrong? finally, is it possible for the login screen to have different wallpaper from the desktop? is ...
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38answers
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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 ...
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2answers
6k 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
31 views

lightdm black screen after installing plasma5 in Ubuntu

I have both ubuntu-desktop and kubuntu-destop installed on my laptop. While sddm works perfectly fine during login, if I choose lightdm as the default login screen, after a reboot, I get a black ...
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0answers
20 views

Shutdown just logging out

I have an older hp pavilion all in one pc and after upgrading to 15.04 whenever I tell the computer to shutdown while in unity (haven't tried other DEs) it goes to the login screen as if I'd only ...
2
votes
1answer
34 views

How to edit (CSS) LightDM GTK+ Greeter

Is there a manual or does anyone know how to edit the (CSS) files for the LightDM GTK+ Greeter? I'm already using LightDM Greeter Settings, but I want more customization. Somehow the webkit greeter ...
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0answers
5 views

Ubuntu 12.04 freezes and does not always let me switch to text-based to restart lightdm

I switched to an old laptop after my two main ones stopped working and this one frequently freezes. At times it will allow me to switch to text-based (CTRL+ALT+F1) and restart lightdm (which is ...
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2answers
179 views

“Starting version 219” after kernel upgrade to 3.19.0-18

Today after kernel upgrade from 3.19.0-16 to 3.19.0-18 lightdm fails to start. GPU driver is fglrx installed from "Additional drivers" tab of "Software & updates". Try to enable service by ...
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vote
1answer
33 views

What are the names of the icons that LightDM uses?

I'm currently trying (and failing) to make a system icon theme for the Ubuntu LightDM login screen. I really hate the default ubuntu-mono-dark icons, and would like to use my own set of icons. After ...
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0answers
9 views

Xorg and issues

Today I've tried to install the SixAxis controller using the official wiki page. It succeeded until I removed the harddrive and this happened ...
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9answers
18k views

Desktop login fails, terminal works

I have a freshly setup 12.04 LTS pc system (120 GB SSD, 1 TB HDD, 16 GiB RAM); since a few days, I can't login to the graphical desktop anymore: there is very short flashing shell window which ...
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0answers
19 views

How can I remove a specific user from the Ubuntu login screen? [duplicate]

I am using Ubuntu 14.04LTS. When I login, there is an extra user called 'Oracle' present. How can I hide this?
2
votes
1answer
36 views

Can't get rid of Lubuntu's Login Greeter

If I lock my computer or logout, when I log back in, I want to see unity-greeter. But I can't seem to get rid of Lubuntu's greeter upon logging in. I once installed Lubuntu but have since uninstalled ...
1
vote
1answer
49 views

Completely unable to login

I've been trying to add more security to passwords, etc. I did the following things (in Ubuntu 14.04.2 LTS) in /etc/pam.d/common-auth, added (as first line) auth required pam_tally.so onerr=fail ...
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6answers
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In Ubuntu 15.04 can't do graphical log in

I have done clean install recently of Ubuntu Desktop 15.04. And I was able to log in to the graphical environment until I enabled "boot to text" like said there: How do I disable X at boot time so ...
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1answer
38 views

Problem to stop lightdm

I'm trying to stop LightDM, but I receive the following error message (translated from German): root@robert-desktop:/home/robert/Downloads# stop lightdm stop: Connection to Upstart not possible: ...
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0answers
13 views

Graphics changed after relogin on Ubuntu 15.04

So, a little background. While trying to fix the issue with chrome and other video player freezing when waking up from suspend, I think I accidentally changed some settings. And from my history I'm ...
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1answer
29 views

FS mounted as RO on boot after upgrade to 15.04

Just upgraded from 14.10 to 15.04. Couldn't get the system to boot ok. I could boot using (upstart) option - not using default systemd. When in default mode the lightdm terminal was stuck before login ...
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0answers
172 views

Nomachine headless connection and dummy display

Sorry for the in-code-tags links, but this is my first post here. I am trying to use windows 7 to connect to a machine running ubuntu 14.04. I installed NoMachine according to: ...
3
votes
1answer
94 views

How to start lightdm services at startup

My system is running Ubuntu 15.04 and I've changed default boot to "text" instead of "quiet splash" by going through answer by @Bruno Pereira How do I disable X at boot time so that the system boots ...
0
votes
1answer
23 views

Black screen after uninstalling lightdm

i use 14.04 and have uninstalled Lighdm, because it runned jackd uppon starting the computer. Now when i start it goes into a black terminal, and i have no access anymore to the normal GUI display. ...
3
votes
3answers
12k 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 ...
0
votes
0answers
7 views

LightDM 14.10: Desktop showing but status bar and quick launch bar not showing [duplicate]

When I boot into my main account the status bar and the quick launch bar are not showing (the desktop with the icons work correctly though). When I boot with the guest account everything works as ...
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4answers
284 views

ubuntu 14.04 login loop problem

My Ubuntu 14.04 is stuck, when trying to login my desktop. Means the screen gets black and soon after that the login screen comes back. I followed all steps in Ubuntu gets stuck in a Login Loop Even ...
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1answer
1k views

lightdm failed to start session; user folder requesting Gnome

We're migrating some old 10.10 users on Gnome to 14.04 using Unity. When they log on, however, the lightdm greeter complains "Failed to start session." /var/log/lightdm/lightdm.log notes: ...
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3answers
57 views

How to hide administrator account or root in Login screen? [duplicate]

I used Ubuntu 12.04 and I want to only user account appear on the Login screen without guest and administrator account. My administrator account cannot view to everybody when their Login. ...
0
votes
0answers
22 views

Unity keep changing windows manager/template i don't relly now [screenshots]

After ugrading from lts 14.04 to last release 15, Unity keeps constansly changing windows manager or gtk theme don't really know which, also, gnome 3 doesn't work, i also had mate and xfce installed, ...
1
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0answers
12 views

Boot in text mode break X

this is my first question and i hope not be breaking any rules. I was trying to boot at text mode and followed these articles How do I boot into true text mode? Disable automatic unity launching? ...
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0answers
31 views

Crossfire Resets When Lightdm Restarts Ubuntu 15.04

So I had Crossfire running on 14.04, but I decided to update to 15.04 and now it's acting strange. I've gone through the typical steps of commenting out everything in /etc/init/gpu-manager.conf, and ...
8
votes
1answer
2k 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, ...
2
votes
0answers
21 views

Unable to login from User account or Guest account (not a duplicate question)

I have Dell 3521 laptop without dedicated video card. It came with Ubuntu 12.04 installed. One fine day, it prompted me for an upgrade, which i went for. During upgrade, its battery finished and once ...
0
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0answers
27 views

Can't get Unity to reload after closing LightDM (Ubuntu 14.04.2 LTS)

Earlier this morning, my computer was running a little slow, and I decided to try to close Xorg using the System Manager(btw, I had done this a couple of times before without any ill effects). ...
1
vote
1answer
137 views

How to enable second x session on tty8 in 14.04

how can I enable a second x session on tty8 in ubuntu 14.04? /etc/lightdm/lightdm.conf and [LightDM] seats=Seat:0, Seat:1 ... [Seat:0] user-session=ubuntu autologin-user [Seat:1] ...
0
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0answers
49 views

How to setup xorg to use multiseat in Ubuntu 14.04

I trying to setup multiseat on clearly installed ubuntu 14.04.02 with core i3 integrated video and nVidia GT260 video cards. I followed this miltiseat instruction on wiki.ubuntu and manual Multiseat ...
2
votes
3answers
4k views

GDM and Lightdm don't work after update; KDM is ok

After updating Ubuntu (apt-get update, apt-get upgrade and apt-get dist-upgrade) last Tuesday, GDM stopped working, and the startup hangs on the Ubuntu logo. Lightdm also don't work (same happens). If ...
0
votes
1answer
251 views

LightDM and GDM login loop. Ubuntu 15.04 Gnome 3

At first the GDM worked just fine but all of a sudden I lost the ability to login. I can still get to my desktop using startx (sound doesn't seem to work when I do that but it might be a by-product of ...
0
votes
1answer
39 views

monitors.xml and LightDM

Firstly some background information: I have a 4 monitor situation, with varying resolutions - 2 monitors landscape (1680×1050,1920×1200) and 2 monitors portrait (both 1050×1680). Once I'm logged in my ...
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0answers
225 views

/etc/X11/Xsession & LightDM

I'm running Lubuntu 14.10. It seems that LighDM invokes /etc/X11/Xsession only if directed to so by the user. In fact there is no shadow of it in lightdm-session wrapper. startx command line ...
0
votes
1answer
560 views

lightdm won't start — “failed to use bus name org.FreeDesktop.DisplayManager”

So I want to stop lightdm. I log out, go to terminal, and type in sudo lightdm stop And my screen goes back to the login screen briefly before going to an empty terminal with just the cursor ...
10
votes
1answer
10k views

Why don't my lightdm.conf edits affect my desktop screen resolution?

I wanted to change my desktop screen resolution to 1366x768. But my VESA drivers(AMD REDWOOD) did not detect that resolution. So I created a shell script as follows:- xrandr --newmode ...
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vote
1answer
706 views

How do I get my Unity login screen back after installing Lubuntu Desktop on 14.04?

I have installed lubuntu-desktop and xfce4 on a Ubuntu 14.04 installation. After doing so, my login screen changed. I have tried resetting my LightDM and attempted to modify the lightdm file, where ...