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

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Complication over VNC, lightdm and startx

I managed to run x11vnc server on my Ubuntu 14.04. I can log into my Ubuntu from my Windows PC using UltraVNC Viewer. The Ubuntu machine is headless. I followed instructions below. ...
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0answers
20 views

Cannot login on 14.10 GUI

So I booted up my laptop like normal and got to my login screen (unity) and once I logged in I was brought to my desktop with icons missing, then thrown back to the login screen. I tried changing my ...
0
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1answer
20 views

Ubuntu fonts are corrupted on certain windows

I'm running ubuntu 14.10 on a lenovo yoga pro 3. Specifically I followed the instructions detailed here during the istallation process: Yoga 3 Linux HOWTO When I login to Ubuntu sometimes the fonts ...
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1answer
14 views

How to hide administrator account or root in Login screen?

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. ...
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0answers
13 views

Double entries on lightdm screen

Actually there is 4 entries on my lightdm login screen . First is Ubuntu default fourth is cairo-dock session second and third are both Kodi(aka XBMC) . Obs: One of Kodi session inside the ...
29
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1answer
4k views

What is the relationship between Unity, Gnome, Gnome 3, Compiz, Metacity, and LightDM?

I am learning about Graphical User Interfaces in Ubuntu and constantly come across different terms, which cause a lot of confusion for me. I have tried reading easy-to-understand tutorials about the ...
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3answers
2k views

Ubuntu 14.04 Login screen password always incorrect

I have just installed Ubuntu 14.04 for the first time boot. I am a long time MS Windows user and don't like where Windows is headed so I decided to switch to Ubuntu and only use Windows for gaming. ...
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1answer
33 views

VMware tools crashing with root access in Ubuntu 14.04.2

I'm trying to enable graphical root login with commands on Ubuntu 14.04.2: sudo passwd root sudo sh -c 'echo "greeter-show-manual-login=true" >> /etc/lightdm/lightdm.conf' Portions of the ...
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0answers
3 views

How can I remove this discoloration from the lightdm-kde-greeter?

I am using Kubuntu 14.04.2 LTS. Recently (not sure since when but it certainly wasn't there at my earliest 14.04 install last year) my locker has started to display some discoloration in some parts. ...
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0answers
25 views

How does LightDM treat PAM?

I use XFCE as my desktop, and I wanna know how LightDM works with PAM. when I use normal kernel arguments, LightDM starts and then XFCE is started by LightDM. When I add "text" to kernel parameter, ...
4
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2answers
408 views

lightdm: cannot type password on login screen

I am running 12.04 LTS, fully updated. My system is configured to automatically log me in into my account. Auto-login works fine. However, sometimes I need to access the unity-greeter/lightdm login ...
0
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1answer
5k 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
52 views

Handling laptops with docking stations on XFCE

Anyone here running a setup in which they use a laptop + docking station setup for XFCE? At work, I plug/unplug from multi-monitor setups all the time and on unity I didnt have an issue (Radeon ...
138
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37answers
405k 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 ...
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1answer
42 views

How to customize login screen for Ubuntu 14.04.2 LTS

is there a way to customize the login screen for Ubuntu 14.04.2 LTS. I want to move my login area of Ubuntu 14.04.2 LTS from left side to the middle. After searching in the web i came across this ...
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0answers
40 views

How to set unity as default?

I followed this link to set unity as my default: How to set Unity as default again? But when I sudo /usr/lib/lightdm/lightdm-set-defaults -s ubuntu, it produced an error. ls lists the following for ...
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5answers
67k views

How do I kill the x-server?

Every time I try to kill the x-server, sudo service lightdm stop so that I can install the latest Nvidia drivers, I get an error message. stop: Unknown instance: What am I doing wrong?
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0answers
61 views

How to run Remote Desktop at startup before logging in?

I've tried Google Remote Desktop first, and added this line to Startup Applications Preference /etc/init.d/chrome-remote-desktop start , but unfortunately this won't be executed before logging in ...
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1answer
627 views

12.04 After HWE upgrade and running Ubuntu Tweak to clean cruft, can't start lightdm

I did the HWE upgrade and that worked fine. System started fine. But I ran Ubuntu Tweak and it reported massive amounts of cruft. So I did the Janitor and uh-oh...system boots to command line ...
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0answers
113 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 ...
42
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1answer
12k views

What happens under the covers to log me in and start up Unity or another Graphical User Interface?

When there's trouble, it might be good to understand what happens under the covers to sign a user into a GUI session and get a Unity (or other window manager) to bring up a desktop.
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1answer
20 views

log in bounce back due to missing system file

I have stupidly uninstalled some system component. And after restart I can not login, every time I typed in the corrected username and password, the login page just bounce back. I am on ubuntu 14.04 ...
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1answer
109 views

Lightdm is broken when used ubuntu tweak to change the default background!

I have ubuntu 14.04 and I used the "change login screen background" and now, when I change my wallpaper, The wallpaper on the login screen dose not change and if I change it via ubuntu tweak, The ...
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0answers
81 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
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 ...
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1answer
124 views

Is sudo killall -u lightdm safe?

I realized that my server has many processes runned by lightdm: Can i killall processes from lightdm? Is sudo killall -u lightdm safe?
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5answers
4k 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? ...
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1answer
54 views

google chrome tearing with integrated intel graphics, but working with optirun

Whenever I run google-chrome, I get a lot of tearing issues. These are easy to notice, for example, when scrolling on facebook. The top bar, the one with the logo and the notifications button, tears ...
0
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1answer
78 views

solved :lightdm using too much of CPU resources

I am using ubuntu 12.04. The lightdm is taking too much amount CPU constantly. I have tried restarting the system many times, but no use. Please help. lightdm version : 1.2.3 Thanks Saravanan
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0answers
28 views

Unable to replicate xsessions/ubuntu.desktop in Ubuntu desktop 14.04 (with xsession-errors)

I have been loosing quite a lot of hair over this one. I am trying to get a second x-session behaving exactly as the default one provided by ubuntu.desktop. So here is what I did: copied ...
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2answers
34 views

No Desktop appear after logged in using lightdm Ubuntu 14.04

Guest Logged in working fine...But When i do logging with my user account..logged in gets successful but after logged in ..nothing appears on desktop except wallpaper of ubuntu. Facing this problem ...
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0answers
50 views

How to disable a monitor at startup?

I am using a notebook with a broken screen, and a monitor. I was having this problem, and pressing the fn key coresponding to the monitors set up worked when logged in. Eventually I managed to fix ...
0
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1answer
35 views

How to restore the Unity greeter after installing and uninstalling xfce-desktop?

After installing the xfce-desktop package, the lightdm greeter runs instead of the unity one, even after uninstalling it. I've looked in every lightdm conf file, and greeter-session is unity-greeter. ...
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0answers
29 views

my lubuntu gui can not login by my user and guest user

I can not login in the gui, it flash and back to login gui after I input password, this is in my /var/log/lightdm/x-0-greeter.log file: ** (lightdm-gtk-greeter:2893): WARNING **: Error retrieving ...
4
votes
4answers
127 views

Cannot unlock session if user has no password

I created an account with no password for my 3 year old child. After some time of inactivity on that account, the session locks. Then I cannot unlock the session. Trying to unlock with an empty ...
3
votes
0answers
61 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 ...
0
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0answers
21 views

User no longer appears in greeter after UID change (14.04)

I've hunted around for solutions to this but to no avail. I've changed my UID to 501 in order to access files on a drive pulled from my old Mac (HFS+). Now I can access the drive with no problems, ...
13
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2answers
31k views

How do I switch from LightDM to GDM?

How do I switch from the default display manager (Lightdm) to the older display manager (GDM)?
0
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1answer
34 views

How do I select the keyboard layout when I log into my Kubuntu 14.04 machine?

I have a laptop with a German keyboard in it, so upon installation, I thought I would set that as the default layout of the system. But most of the time, I use an external keyboard with a dvorak ...
0
votes
1answer
108 views

How to change my onboard keyboard theme in lightdm gtk+

I'm running Xubuntu 14.04.02 and have created a custom Onboard keyboard theme, which works fine once I'm logged in. The problem is my greeter screen, when I launch Onboard it keeps the default theme ...
0
votes
1answer
129 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 ...
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votes
0answers
13 views

How to execute a script on logout

I created a shell script and want it to be executed everytime i logout from the system. I found a thread that already explains it but since the lightdm.conf folder is missing in Ubuntu 14.04 at least ...
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0answers
58 views

Stuck at splash screen when changing to GDM

After considering it for a while, I finally decided to install GNOME onto my Ubuntu 14.04 system to give it a play and see if I it was worth switching to Ubuntu GNOME. Everything seems to be fine ...
0
votes
1answer
57 views

Login screen design / wallpaper does not work

I am using Ubuntu 14.04 but installed xubuntu-desktop afterwards. Now the login screen is very ugly: The theme is not applied and I cannot change the background picture (only black one shown) Only ...
0
votes
0answers
37 views

lightdm crash after changing resolution

my laptop is dual boot win8.1/ubuntu 14.04 lts two gpus: gtx980m/hd4600 I use nvidia-346.47 and bumblebee, following the configuration tutorial How to install nVidia drivers with Bumblebee on Ubuntu ...
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votes
2answers
234 views

Log Out problem after upgrading from 13.04 to 13.10 [duplicate]

After I've upgraded from Ubuntu 13.04 to 13.10, I can no longer use the Session Indicator "Log Out..." menu. As soon as I click on it, the screen goes blank with no mouse or keyboard input, so I ...
0
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1answer
61 views

Guest account works, but regular account does not

My System is Samsung R580 and I am having a problem logging in to Ubuntu 14.04.02 LTS. Yesterday, I ran sudo apt-get update and apt-get upgrade, and have not been able to log into my admin account ...
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0answers
91 views

Ubuntu 14.10 system program problem detected after login and no desktop

I messed up with lightdm by CTRL+ALT +F1 and stopping it. Then tried to return by pressing CTRL+ALT +F7 switched to black screen. Then I tried everyting I saw on the web like reinstalling gdm, ...
2
votes
2answers
9k 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 ...
54
votes
15answers
33k views

How do I disable the drum beat sound on the login screen?

I would have expected System ▸ Administration ▸ Login Screen ▸ Play login sound to control this, but unchecking it does not prevent the drum beat sound from playing.