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

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black screen on booting

I've been working with Ubuntu on my lenovo for awhile. after heavy using I started to face the black screen when I reboot. Cursor at the top left blinking with the sound of rebooting. I still see the ...
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2answers
5k views

Type password into login screen, hit enter - nothing happens

I first install Ubuntu 13.10 a few weeks ago and its been going great. I'm still pretty new to Linux, so I haven't been doing a whole lot. The past couple days I've tried installing LAMP, then ...
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4answers
6k views

How to uninstall lightdm?

I removed Unity from my computer. But still lightdm is showing when I typed sudo dpkg-reconfigure lightdm. I want to remove it. What can I do?
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1answer
2k views

How to reconfigure lightdm? [duplicate]

Last night I installed KDE. But then however my Desktop manager changed into KDM. How can I go back to my default Desktop manager lightdm??
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1answer
303 views

Cinnamon won't run on *Ubuntu 13.10

I tried to install cinnamon on my Kubuntu 13.10, just upgraded from 13.04 without problems. There is this ppa: ppa:gwendal-lebihan-dev/cinnamon-stable Also tried to use the non-ppa-versions (those ...
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1answer
1k views

NoMachine NX Client V4 and Lightdm

I am trying to connect from an Ubuntu 13.10 laptop with Nomachine nx V4 to an Ubuntu 12.04 system with Nomachine nx V3.5 I can successfully connect to the machine, but if I try to connect to the ...
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0answers
179 views

After changes plymouth theme ubuntu dont boot

After I changed plymouth theme i cant boot up my pc. plymout show but after few second screen go off. I tried pres CTRL + ALT + 1 and CTRL + ALT + 7 but after that screen turn on but i can see only ...
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2answers
53 views

How to prevent login directly to my defaul desktop?

I installed lxde on my OS. But when I start up my os it doesn't take me to the login screen it just boots to the default DE right away. How do I make it so that I can boot into LXDE right away? Or how ...
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0answers
288 views

How do I fix corrupt background in LightDM?

After a fresh installation of Lubuntu 13.10 the default background image is distorted (the provided image shows a part of it). All GUI elements are displayed correctly. If I then select a different ...
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3answers
9k views

No screens found with usable configuration (Live-CD), boot-repair CLI

I have an MSi GE70 Laptop (Graphics: nvidia GeForce GT650M). At first I couldn't boot nor install. After adding 'nomodeset' in Grub I was able to start the installation. `Try Ubuntu`` just gave me a ...
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1answer
87 views

Assigning sounds on startup and shutdown

As every time i boot into ubuntu it makes sound, i want to assign a custom sound on startup as well as on log off and shutdown. Is it possible??
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0answers
39 views

Add entry to login user menu to directly execute command

I want to add an entry to my login menu to execute and run a program with whatever parameter I specify. I'm vaguely aware it is possible, but not quite sure how. As a side note, I want to ...
0
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1answer
2k views

lightdm/unity-greeter wallpaper will not set

I am trying to set the wallpaper on my login screen, but i cant seem to get anything to stick. I have used gsettings set com.canonical.unity-greeter background '/path/to/pic.jpg' as user 'lightdm'. ...
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1answer
915 views

Login Screen on 13.10 keeps looping back to login (XOrg/NVIDIA problem?)

Upgraded from 12.04 to 13.10. Seemed to go OK, but when rebooted the login screen was very low resolution with trailing mouse, so purged the Nvidia drivers, then reinstalled via PPA as in ...
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1answer
1k views

Only Guest session can be started

While Ubuntu is starting, the following messages are shown and stays shown for long time: * Starting LightDM Display Manager [OK] * Stopping Send an event to ...
5
votes
1answer
3k views

How to get the right DPI resolution on Ubuntu 13.04 Saucy?

The physical DPI of my laptop screen is approximately 142 dots per inch as you can calculate from the correct output of xrandr --query: $ xrandr --query | head Screen 0: minimum 320 x 200, current ...
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1answer
101 views

Identification and Authentication methods in Ubuntu

Since I have a very long password, I would like to additionally use an alternative login method. Which other authentication methods are possible in Ubuntu to log in?
3
votes
1answer
225 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 ...
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vote
1answer
3k views

How to revert back to GUI as the default interface from CLI in Ubuntu desktop?

I was able to set up a text-only UI (CLI) by editing the file /etc/default/grub in Ubuntu 12.04 as per the instructions in: How do I disable X (GUI) at boot so that the system boots in CLI mode? using ...
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1answer
2k views

Wrong display configuration used by LightDM in Ubuntu 13.10 when laptop lid is closed in docking station [duplicate]

Since upgrading to Ubuntu 13.10 on my laptop (actually to Xubuntu as I switched to XFCE) I'm running into problems with LightDM: I use two external displays (one 24" and one 22" display) connected to ...
0
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1answer
280 views

Tried replacing LightDM with GDM, now computer won't start

After upgrading from 13.04 to 13.10, I was having the problems described in this bug (ie couldn't mount a USB/CDROM and couldn't use GUI shutdown button) ...
6
votes
3answers
4k views

Why is my system freezing when I switch users

Hello I've recently upgraded from 13.04 to 13.10 64bit. I'm running AMD graphics with the proprietary drivers. I have two user accounts. Mine(administrator) and my girlfriend's(standard) My ...
2
votes
1answer
1k views

How to let screen time out on sign in screen [closed]

I have Ubuntu 13.10 set up on an older PC. If I am logged in as a user, then the screen timeout and power saving mode works as expected. However, if nobody is logged in, the screen never times out, ...
2
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1answer
52 views

How can I list the WM manager sessions available from the command line?

How can I list the WM manager sessions available from the command line? I want to know what sessions are available to pass to thr lightdm-set-defaults utility.
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0answers
237 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 ...
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2answers
267 views

Is it possible to get the normal login screen when resuming from suspend?

I noticed that the login screen that I get when the system first boots up is different from the login screen I see after I resume from suspend. I'm wondering if it is possible to get the same login ...
0
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1answer
245 views

Strange crashes on Zenbook UX31A with Ubuntu 13.10

I'm facing some strange crashes. I initially installed 13.04 on my Asus Zenbook UX31A and used Cinnamon as my preferred desktop environment. After upgrading to final version 13.10 I'm not able to ...
3
votes
1answer
4k 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
144 views

Screen always on when on Lightdm login [duplicate]

Since updating from 13.04 to 13.10 my monitor when on login screen (Lightdm) is always on and the blank screensaver never works. Gnome Screensaver is activated and is working find when logged in. ...
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0answers
100 views

(How) Can X11 Know My Screen Orientation Pre-Login? (Ubuntu 12.10)

Problem: a laptop usually plugged into 2 external monitors, both rotated 90 degrees. At login time, the 3 displays are mirrored, and only the laptop itself is appropriately oriented. I'd prefer to ...
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2answers
2k views

login problem for 13.10, my username does not appear

After upgrading my Ubuntu to the newest version 13.10, in the login interface, my account does not appear. I can login the guest session. There is also a remote login. I have no place to input my ...
3
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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 ...
0
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1answer
139 views

Lightdm active user indication removed

Just updated to 13.10 and I notice the Lightdm sign in screen on a multi-user system no longer indicates which users are already logged in. Previously active users were listed in bold text.
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1answer
1k views

Replace LightDM with MDM on Ubuntu 13.10

I'm trying to replace LighDM with MDM on Ubuntu 13.10, but there already is package in Ubuntu sources called mdm. It's not display manager, but "The Middleman System"... So the PPA install doesn't ...
9
votes
1answer
4k views

Personalize monitor position before login

I'm using multiple monitors. When logged in everything I fine. Left monitor is positioned left and right monitor is positioned right, but before I login the login screen positions them the other way ...
0
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1answer
2k views

How to fix Ubuntu 12.04.3 boot to black screen full of errors in white text, after upgrading on dell inspiron 1501

I am running a Dell Inspiron 1501 I use Linux only. No Microsoft or Apple operating systems (or really anything closed-source). I've only been using Linux for a little over a year but I'm starting to ...
0
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2answers
343 views

error to install lightdm because of plymouth

When I use this command sudo apt-get update , the output is as follows: Hit http://security.ubuntu.com raring-security Release.gpg Hit http://us.archive.ubuntu.com raring Release.gpg Hit ...
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3answers
2k views

Ubuntu is in command mode how to turn on the GUI mode again?

I have HP Probook 4540s with Radeon graphic card, I downloaded drivers from This site and installed those after reboot I couldnt see my launcher and toolbar but yes i could use few shortkeys, I looked ...
4
votes
0answers
1k views

What is the “Light Display Manager” user account? [closed]

I installed Ubuntu 13.10 and suddenly I see a new user account to log in to (besides mine), called "Light display manager". Could someone explain why this account appears?
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1answer
1k views

low-graphics mode error in 13.04 with no graphics card [duplicate]

When I try to boot my computer, I get this error: "The system is running in low-graphics mode Your screen, graphics cards, and input device settings could not be detected correctly. You will need to ...
0
votes
1answer
339 views

Screen glitches or freezes after screen lock with Intel Video Driver

I'm running 13.04, and have an Intel HD 5200 display, using the Intel drivers. When the screen times-out and locks, most of the time one of two things happens: Either the current windows are still ...
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0answers
1k views

Invisible mouse

When I boot Ubuntu I can see the mouse cursor at the login screen but once I put my password is see this error could not acquire name on session bus I tried to Google the error but all I find is stuff ...
0
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0answers
37 views

Another way to fix “The system is running in low-graphics mode” error? [duplicate]

I began having the infamous "system running in low graphics mode" error after my daughter turned off the power so she could boot into Windows. Looking at the lightdm log in in /var/log/lightdm/ ...
0
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1answer
739 views

Ubuntu Remote Login help

I'm trying to register a machine in the "Universal Client Configuration Service" so I can login remotely (via the login page for lightdm), however I'm not sure what to use in the "Server URL" field. ...
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0answers
33 views

Any Mechanical Drive Tweaks?

Noticed a couple of SSD-specific tweaks like putting log files to tmpfs, discard and noatime, etc. Was curious if such tweaks would also work on mechanical drives or be advisable? I noticed a little ...
0
votes
1answer
688 views

no GUI after normal update

After I finished working, I made the usual update that ubuntu every now and then ask to do. Please notice is update, I'm not upgrading the distro. After it finished, it asked for a reboot which I did. ...
0
votes
1answer
101 views

how to save while editing in /lightdm.conf

Hi I tried disabling guest account by editing lightdm and a bug sends me to it showing low graphics. I went I to termin and undid the change I made in /lightdm.conf but don't know how to save tbe ...
2
votes
1answer
2k views

Login loop with gdm and lightdm, startx works

I am running 12.10. Attempting to login via gdm lands me back at the login page. The behaviour is the same for when I switched to lightdm. Logging in with guest is fine, and logging in with a test ...
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
1answer
106 views

Upgrading from 12.04 LTS to 12.10

I have Ubuntu 12.04 installed on my VAIO, alongside Windows 7. I know Ubuntu upgrades won't damage my Windows drive and I'm fine about it, but I've seen people saying 'Unity 2D removal' and 'purge ...