GNOME Display Manager (GDM) is a program which used to provide Ubuntu's graphical login screen until Ubuntu 11.10; since then it has been replaced by LightDM. You may still install it manually if you prefer, however.

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30
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6answers
284k views

How does one exit the X server?

The command sudo service gdm stop would successfully disable the X server in Ubuntu 11.04 temporarily. However, this same command no longer works in Ubuntu 11.10, because "gdm" is an "unrecognized ...
3
votes
1answer
30 views

gdm/lightdm: can't login, but startx works

I just ran apt dist-upgrade. I had ubuntu 14.04. Things went smoothly, but after reboot I can't get past the login screen. I tried both GDM and lightDM, but running startx from the terminal works. ...
0
votes
0answers
9 views

can't change from gdm and monitor swaps after login

I ran updates yesterday. This morning, the login screen had changed from lightdm to gdm (i think) and three seconds later the screen went blank. I couldn't even get to ctrl alt f1 terminal. I did a ...
0
votes
0answers
20 views

GDM not starting after installing GNOME 3 on Ubuntu Server 15.10

First thing after installing Ubuntu Server 15.10, I got all the updates and installed GNOME 3.16.4: sudo apt-get update sudo apt-get upgrade sudo apt-get install gnome-shell But after a reboot I ...
0
votes
1answer
27 views

How to switch off gdm?

Because after update - gnome and gdm are not working, and I need to switch off gdm as display-manager. Now am logged in with bodhi-linux ... how can I disable gdm for to log in into ubuntu to proceed ...
6
votes
2answers
118 views

Email on failed login attempt?

I was wondering if it is possible to set it up in such a way that on a failed login Ubuntu will send me an email? And of course if the computer is not connected to the internet when the attempt ...
-1
votes
0answers
34 views

Lightdm is giving me “The system is running in low-graphics mode”

I was trying macbuntu on Ubuntu 15.10 and due to some bug in it, i wasn't able to login into the system as login screen was coming again and again even after feeding in the right password. So, i ...
40
votes
6answers
39k views

How to hide users from the GDM login screen?

I have recently added several new users, that I need for qmail. Now they appear in the box in the login screen and clutter it, and I have to scroll to find my user. How can I hide those users from the ...
7
votes
1answer
29k views

How to change from GDM to LightDM?

I've upgraded to 12.04. My upgrade didn't go as expected; X crashed at the middle of the upgrade. I had to install many packages manually. This left me with a GDM login screen. How do I change from ...
2
votes
0answers
61 views

Change the login screen theme in Ubuntu Gnome 14.04

Can anyone show me a way to change the default login screen theme with the ones available at http://www.gnome-look.org ? For eg, this http://gnome-look.org/content/show.php/HexLogin?content=169840 ...
1
vote
1answer
32 views

Why am I getting gdm and a bunch of packages in the list of apt-get autoremove?

Of late, I've done a lot of configuration changes on my Trusty laptop (14.04 LTS). Firstly, I installed gnome-shell, did all updates and migrated to the LTS enablement stack. After that, I added the ...
0
votes
0answers
19 views

Cannot update /var/lib/gdm/.ICEauthority after restoring /var directory

I have tried the following for getting this error fixed. Boot into "Recovery Mode". Input the root password for maintenance mode. Go to the /var/lib/gdm folder (cd /var/lib/gdm). Remove the ...
18
votes
3answers
46k 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
votes
0answers
68 views

Cannot make it to login (gdm/lightdm bugs) after Nvidia driver update tentative

I used my girlfriend's computer which runs on Ubuntu 15.10 (wily) and wanted to update the Nvidia GPU. I did install the last driver released on the Nvidia website corresponding to this Geforce GT720. ...
3
votes
1answer
55 views

How to make GDM have a limit of incorrect password attempts before action is taken?

I am currently running Ubuntu GNOME 15.10 with GNOME 3.18, though I used to (a long while back) run Windows 7, and though Ubuntu is better in most ways, there is still a feature lacking or at least a ...
0
votes
0answers
29 views

Ubuntu 15.10 Alt Above Tab shortcut for Guake

I can't get Guake to use <Alt>Above_Tab (or "`", or sometimes called tilde?) for hide/show shortcut. I first disabled the original actions of both <Super>Above_Tab and <Alt> ...
1
vote
2answers
70 views

Ubuntu 14.04 stuck in login loop after update, nothing seems to help

I updated my ubuntu 14.04 after it was being unused for 4 months. The updating took enormously longer time than usual, and after that the computer was very slow. I rebooted the computer and now I ...
0
votes
0answers
23 views

Won't suspend-screen locks with black screen and cursor

When I leave my computer alone and the screen blanks after X minutes. Then instead of going fully blank, then suspending after the set time I'm left with a black screen with my cursor. If I touch the ...
0
votes
1answer
4k views

Log in fails and returns to log in screen

I am running a very nearly fresh Gnome version of 12.10, with no particular tweaks or customisation. I performed an upgrade yesterday using sudo apt-get update; sudo apt-get upgrade which completed ...
0
votes
1answer
60 views

15.10 lightdm broken - gdm works

After some updates to my system lightdm seems to be broken (can't get a session with lightdm to work, always ending up in low graphics mode at boot). If I chose gdm it however works. But I would like ...
0
votes
1answer
25 views

GDM fails to launch xfwm4, but lightdm succeeds?

I use GDM and usually run an XFCE4 session. Suddenyl, if I attempt to boot in using GDM, the following symptoms appear> 1) the GDM background does not go away 2) windows from two applications (remains ...
2
votes
1answer
88 views

Two different login/lock screens

I have Ubuntu 15.10 installed and when I first start my computer it gives me the really nice looking ubuntu lightdm login screen but anytime I lock the computer I get the really nasty looking gnome ...
4
votes
1answer
7k views

Setting up the GDM Theme

I'm using Ubuntu 12.04 with Gnome Classic (no effects) and because of the fact that some system options have disappeared with the new system release I've been struggling with this for a while and ...
0
votes
0answers
56 views

Using i3wm on Ubuntu Gnome 15.10

I am having trouble figuring out how to use i3wm on my installation of Ubuntu Gnome 15.10. The only way I've got it working was through stopping gdm with systemctl stop gdm in text-only mode, and then ...
0
votes
0answers
39 views

Desktop not responsive after ubuntu-gnome-desktop installation (Ubuntu 15.10)

In order to use gdm instead of lightdm I followed the instructions from this post I could then use gdm but my desktop (meaning the background area) is not responsive anymore and shows the login ...
11
votes
5answers
25k views

How to install the full GNOME desktop as close to upstream as possible?

Just like the title says. I don't want just Gnome Shell I want to know how to install the whole entire desktop, with the latest GDM(not the 3.0.4 currently in the repos), all the default apps, all of ...
4
votes
2answers
59 views

How to make 4 equally sized windows in corners of screen in GDM?

I recently saw this answer to a great question, and I wondered, is this also possible on Ubuntu GNOME 15.10 with GNOME 3.18 and GDM, as well as on Compiz as the answer to that question shows? But the ...
6
votes
1answer
633 views

How do I set up automatic login?

How do I get 10.04 (Lucid) to log me in automatically on each reboot?
22
votes
8answers
28k views

How do I disable GDM and Graphical User Selection?

The new Ubuntu features a completely unkillable GDM. Is there a way to disable it? It is not enabled in services , the GDM startup script is deleted, it is removed from update.rc but it still starts ...
0
votes
0answers
37 views

How do I disable GDM's automatic screen locking *after a virtual terminal (VT) change*? It's too buggy and never works correctly

Every so often either my touchpad stops behaving or some program (Firefox or QEMU) freezes my system and I have to switch to a virtual terminal to fix it (merely switching to a VT and back fixes the ...
1
vote
0answers
9 views

how do I stop gdmdisplay

I am getting about 65000 log entries per hour from gdm. it generates the standard message: WARNING: GdmDisplay: display lasted 0.050808 seconds We do not use gnome on this machine and I want to get ...
11
votes
6answers
110k 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?
4
votes
6answers
22k views

GDM isn't able to login

The login screen shows and i choose myself. Then the screen goes black, and the login screen shows again.
0
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0answers
60 views

Lightdm not working properly in Ubuntu 14.04.3

Recently I installed ubuntu-gnome desktop and then purged the same after trying and I have chosen my default desktop manager as lightdm and there is nothing like gdm as I have purged it also.The ...
0
votes
0answers
17 views

Black screen with cursor after login ONLY FOR ONE USER

When I login in to gdm, I get a black screen with just a cursor (tested, stays for 10 mins). However, I made a test user and I can log into that account without any problems. I use nvidia-restricted ...
14
votes
6answers
54k views

How to restart only missing/invisible mouse pointer/cursor?

For some reason, the mouse pointer on my Ubuntu 10.04 PC disappears after the computer is woken up from suspend. That PC is missing a keyboard, so I can fix this by logging via ssh, and issuing: ...
0
votes
1answer
58 views

How to disable 'Tap to click' on the login screen

Due to lots of chocolate cake getting into my computer my touchpad doesn't work very well (along with the rest of the computer) any more, so I have disabled 'Tap to click', however this seems to have ...
1
vote
1answer
56 views

On screen keyboard for locked screen

As I am having some trouble at the moment with the locked screen and entering my password, I was wondering if there was some sort of on screen keyboard which could be displayed to me on the locked ...
1
vote
1answer
4k views

gdm not working with Ubuntu 15.10

I just upgraded to 15.10, and everything went smoothly. One of the first things I did was install gnome-shell, and switch from lightdm to gdm. However, when I restarted, after an initial purple Ubuntu ...
29
votes
3answers
37k views

Multi display issue with Ubuntu GNOME 14.04 [closed]

Fresh install of Ubuntu GNOME 14.04 with 3 displays (fglrx driver). I can correct the screens order in System Settings / Display but it is not saved when I close the session and reopen it. Screens ...
0
votes
0answers
12 views

Is log-in back into (encrypted) installation possible?

Here is 15.04 with encrypted home-partition and because of system-d I was kicked out of gdm and then I was not able to log-in back into desktop. So then I changed the password to an empty password ...
0
votes
1answer
156 views

yoga 2 pro won't boot after update to ubuntu 15.10/ GDM

After upgrading to Ubuntu 15.10, my mouse pointer was no longer visible. As a remedy, I installed GDM as suggested in some posts here. That worked, but now (first full boot after installation of gdm) ...
3
votes
1answer
395 views

Is “gdmflexiserver” part of the default installation?

While playing around, I discovered a folder in my $PATH that I did not recognize: $ echo $PATH /usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games $ ls ...
2
votes
0answers
84 views

gdm and fluxbox on ubuntu 14.04

unable to run fluxbox with below package installation on ubuntu 14.04. I have mini iso installed ubuntu 14.04 running on embedded board. I am trying to configure fluxbox with below minimal package ...
66
votes
1answer
88k views

What's the difference between GDM and LightDM?

What is the difference between GDM and LightDM? How can one switch between them. I mean if I have selected LightDM during installation process, will I be able switch to GDM?
0
votes
1answer
18 views

Building custom live Ubuntu Gnome 3.12.2 based, only for GDM: authentication failure

I'm building a custom live Ubuntu Gnome 3.12.2 based, Only if I create a new user, set password and add him to sudo group, setting by dpkg-reconfigure GDM ad default greeter, obtain a black screen ...
9
votes
1answer
187 views

Set a different passwords for unlock and sudo [duplicate]

I am running a single-user Ubuntu install. When I enter the password to unlock my screen after suspend/timeout, it is the same password I use for sudo - my user password. Is there any way for me to ...
0
votes
0answers
25 views

Display legal banner before (graphical) login

I'm using Ubuntu 14.04, and want to have a legal banner displayed before login in. This was possible with older versions of GDM. I tried to do it in lightDM but did not succeed, and GDM 3.10 for ...
0
votes
1answer
157 views

Ubuntu gnome slow boot (over a minute), 15.04

I am experiencing some unusual booting times in my gnome environment. I have ran bootchart and dsmeg but I am not sure what to extract out of it. Here's the dsmeg log at about the time the timestamps ...
3
votes
1answer
147 views

User switching broken in 14.04

I just upgraded to 14.04. I have an nVidia graphics card and am using the nVidia driver (proprietary, tested). I am using gdm as I don't light the look of lightdm (also, I have two monitors and it ...