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Questions tagged [gdm]

GNOME Display Manager (GDM) is a program which provides Ubuntu GNOME's graphical login screen.

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111 votes
1 answer
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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?
user7044's user avatar
  • 3,861
86 votes
3 answers
101k views

Is there to make the login screen appear on the external display in 18.04?

On Ubuntu 18.04, I have connected my laptop to an external display and I am able to set the external display as primary and external display only mode. But when I turn on my laptop or log out from my ...
Aravind's user avatar
  • 1,408
80 votes
8 answers
100k 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 ...
gruszczy's user avatar
  • 1,161
74 votes
7 answers
330k 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)?
Ron Belcher's user avatar
60 votes
1 answer
32k views

How do I switch between console mode and GUI in 17.10 and newer?

After upgrading to 17.10 like a true pioneer, I found the old CtrlAltF1 no longer switches between console mode and GUI, and a quick Google search brought up nothing useful. Was this feature removed ...
Aero Windwalker's user avatar
59 votes
7 answers
468k 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 ...
user avatar
58 votes
4 answers
164k views

Is gdm3 preferred to lightdm?

I have hard a hard time finding good information on the performance difference between display managers on Ubuntu (specifically between lightdm and gdm3). With Ubuntu switching to Gnome, I would ...
Startec's user avatar
  • 1,825
45 votes
6 answers
389k 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?
Mysteriousness's user avatar
44 votes
4 answers
93k views

How do I change login screen theme or background in Ubuntu 20.04?

How can I change the Ubuntu 20.04 login screen theme or background? In the previous version 19.10, I can change it from the CSS file under Yaru theme but now there is no CSS file.
Dion's user avatar
  • 441
40 votes
9 answers
227k views

GDM3 does not start in Ubuntu 18.04

I recently upgraded my laptop from Ubuntu 17.04 to 18.04. It worked perfectly well and I have been using it without any problem, but yesterday I issued sudo apt upgrade and it upgraded some packages. ...
Vajira Prabuddhaka's user avatar
40 votes
7 answers
62k views

Force gdm login screen to the primary monitor

I have two monitors attached to my video card. Primary monitor has a resolution equal to 1280x1024 and the second has 1920x1200. My gdm login screen always appears on the second monitor even if it is ...
Kirill V. Lyadvinsky's user avatar
38 votes
5 answers
88k views

Can't switch to gdm3 using sudo dpkg-reconfigure gdm3

I was looking for a way to switch to gdm3 from lightdm, when I found this answer. So I tried to apply it, and entered sudo dpkg-reconfigure gdm3, then a selection screen appeared with 2 options: gdm3 ...
Tooniis's user avatar
  • 1,572
37 votes
11 answers
151k 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: ...
sdaau's user avatar
  • 3,096
36 votes
1 answer
143k 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 ...
Eduardo Pinheiro's user avatar
34 votes
5 answers
33k views

How to make the lock screen look like the login screen?

Is there any way to make the login screen from a locked session (either by using Ctrl+Alt+L or from a screen timeout) look like the login screen when you're starting a new session? I hate that ...
Chris Kerrigan's user avatar
33 votes
3 answers
50k 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 ...
chewiiie's user avatar
  • 341
32 votes
9 answers
37k 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 ...
Kristina's user avatar
  • 423
32 votes
1 answer
13k views

How do I replace the desktop by an application?

Sometimes it may be needed that a user only has access to a certain application. Running the desktop environment then may be unwanted be it either for security reasons or for acchieving a better ...
Takkat's user avatar
  • 143k
32 votes
3 answers
6k views

How can I change the order of the users in the login screen?

I have several user accounts on a machine my mother uses most of the time. How can I sort the users so that her account shows up first in the list?
ParanoiaPuppy's user avatar
30 votes
4 answers
78k views

How to disable GUI on boot in 18.04 (Bionic Beaver)?

It appears that sudo systemctl disable gdm3 && sudo systemctl disable gdm do not work in 18.04 to disable the windowing system at bootup. What's the method for doing this now?
ylluminate's user avatar
  • 1,499
29 votes
7 answers
56k views

How can I change the login screen theme in GDM?

How can I change the Login screen theme? Is there a graphical way or no?
Weboide's user avatar
  • 10.6k
29 votes
1 answer
147k views

Which display manager should I use? LightDM or GDM? [duplicate]

Possible Duplicate: What’s the difference between GDM and LightDM? I'm a somewhat experienced noob on this Linux-thing. I'm growing quite familiar with Ubuntu and I just love Gnome(3+). Just by ...
dbm's user avatar
  • 453
25 votes
2 answers
66k views

Remote login with graphical display manager (GDM, LightDM)

Is it possible to remotely (via ssh) make a login to GDM? I'll explain a situation in which I'd need this: I'm on my laptop and connect to my desktop via ssh. I realize there are some updates ...
luri's user avatar
  • 4,112
21 votes
1 answer
54k 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 /etc/X11/default-display-...
RanRag's user avatar
  • 555
19 votes
6 answers
22k views

Black screen after waking from suspend on Ubuntu 20.04

I am very new to linux. On my laptop I have a multiboot with Windows 10 and Ubuntu 20.04 on the same disk. The problem is when I suspend to RAM and then wake it up by pressing the power button, the ...
nice-guy's user avatar
  • 191
18 votes
10 answers
100k views

How I can change the GDM login screen wallpaper?

How I can change the GDM 3.6 Wallpaper? I dont mean the desktop background, but the Wallpaper at the login (GDM 3.6). Thanks Thank you for your answer, I know exactly what you mean. Recently I had ...
falk's user avatar
  • 181
18 votes
1 answer
10k views

Why is my GDM at a different TTY than my desktop environment?

I am running Ubuntu Gnome 16.10 (64bit). Gnome-shell version 3.20.4. When I start my computer, I eventually see GDM3 offering a login prompt, as expected. After I log in, my monitors flash a little (...
JoshuaD's user avatar
  • 537
18 votes
3 answers
19k views

How to get the GNOME 3 login manager installed?

I was wondering if it is possible to get the GNOME 3.2 GDM login theme working on Ubuntu 11.10. I installed GDM alongside LightDM, but the GDM greeter is really ugly.
Ubuntuser's user avatar
  • 9,836
18 votes
1 answer
6k views

Why use a Display manager?

I'm currently trying to free as much memory as possibile because I'm using my laptop for scientific simulations. One of the things I made is disable gdm and using login+startx to start GNOME session. ...
Juan Sebastian Totero's user avatar
17 votes
2 answers
16k views

Restarting gdm in 18.04 doesn't work

When I try to run one of these commands: sudo service gdm restart sudo service gdm3 restart the system gets stuck in a loop. It goes from the graphical interface to a black screen, then a terminal-...
csha's user avatar
  • 427
17 votes
1 answer
3k views

Ubuntu 22.04 won't wake after screen lock / screen dim

I have a fresh installation of Ubuntu 22.04 and it won't wake after screen lock. This is true for both, X11 and Wayland (also disabling Wayland for gdm3 doesn't help). System suspend works fine, only ...
Leszek's user avatar
  • 3,009
16 votes
5 answers
28k views

Scaling Gnome login screen on HiDPI display

Running Ubuntu Gnome 17.04 on Lenovo yoga 2 pro. Display is 3200x1800. My desktop scales fine, and was done automatically without any configuration when installing. My login screen however, everything ...
rosghub's user avatar
  • 261
16 votes
2 answers
11k views

How do I access console from GDM ? (wayland)

When on GDM login screen, Ctrl+Alt+F3 ... F7 does not work. After logging into GNOME desktop, then Ctrl+Alt+F1 will bring me to GDM, F2 back to GNOME, and F3 to F7 to a TTY terminal. But before I log ...
alci's user avatar
  • 5,839
15 votes
6 answers
58k views

How to disable GDM from being automatically started?

After Ubuntu Server 12.04 installation, I installed Xubuntu just to have a minimal GUI: sudo apt-get install x-window-system-core sudo apt-get install --no-install-recommends xubuntu-desktop gparted ...
josircg's user avatar
  • 1,249
15 votes
4 answers
51k views

How to change the screen resolution for the GDM login screen?

I use a login list with faces and the icons and text are tiny in GDM. Is there an easy way to change the resolution of the login screen? I'm currently using 10.04 Lucid.
Dennis's user avatar
  • 2,483
15 votes
6 answers
37k views

How can I stop GDM on Ubuntu 18.04 Desktop in order to install NVIDIA Driver?

In the case of Ubuntu 16.04. I can download the NVIDIA driver run file and then ctrl+alt+F1 and then do the below sudo service lightdm stop sudo ./NVIDIA-Linux-x86_64-390.48.run I follow on screen ...
user3667089's user avatar
15 votes
3 answers
12k views

Ubuntu 17.10 is not running Wayland

I am experiencing some strange problems in Ubuntu 17.10. At the login screen I am missing the small icon that allows changing between X and Wayland. In fact, the default installation is running X and ...
Ricardo Gomes's user avatar
15 votes
1 answer
6k views

How do I disable the swipe to unlock curtain? [duplicate]

My computer is not a phone. This swipe to unlock thing is ridiculous. Yes, I know Esc is supposed to substitute for the swipe, but the whole curtain thing does not interact well with my video setup. ...
Gorilla's user avatar
  • 151
14 votes
3 answers
3k views

How to change the order of users in gdm login screen?

I'm the only frequent user on a system using gdm, but in the login screens' user list I am not moved upwards (due to most frequent use), and I cannot find a possibility to order the users manually. I ...
azrdev's user avatar
  • 343
14 votes
3 answers
3k views

Software Center in Dark Theme Unreadable

So I am using the dark theme in gdm and the text in the software center is unreadable. I found a workaround by changing the font color from the .css as follows sudo gedit /usr/share/software-center/...
OdinRW's user avatar
  • 632
13 votes
2 answers
43k views

18.04: How to get Wayland back after upgrade to 18.04?

Since 17.10 I got familiar with Wayland and I really need the per-monitor-scaling! How can I start a wayland session after dist-upgrade to Bionic? There is no option in GDM available out-of-the-box. ...
user200016's user avatar
13 votes
3 answers
5k views

Cannot Switch Terminal Ubuntu 18.04

Since I installed Ubuntu 18.04, I can not switch to tty3-7 from the login screen. Until Ubuntu 17.10, this worked perfectly using Ctrl+Alt+F3, F4, .. both from login screen and from user sessions. ...
David Georg Reichelt's user avatar
12 votes
5 answers
30k 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 ...
Relik's user avatar
  • 507
12 votes
3 answers
13k views

Cannot change login screen background in 18.10

I changed both the desktop and login screen background photos. However,only desktop photo is changed. The one on the login screen is still the purple Ubuntu one. Is this a bug?
lovedrinking's user avatar
12 votes
1 answer
22k views

How do you add a new window manager to the gdm menu?

So, I've been having trouble finding a definitive answer on how to do this. I've compiled and installed a window manager that is not available in the ubuntu package repositories, and now I'm ...
gabe.'s user avatar
  • 223
11 votes
3 answers
19k views

How can I make a script run automatically after gdm login and logout?

I have a setup where my users log on using ldap and it works just fine. I want to run a script after my users login (its a script that will detect which groups they are in and map network shares ...
Fernando's user avatar
  • 1,015
11 votes
6 answers
40k views

How to change the login screen resolution in Ubuntu 18.04

I need a way to change the boot-up and login screen resolution to 1920 x 1080 resolution. I have a 4K display on my laptop and can't read the text in the grub bootloader screen properly as they aren't ...
Bernard Wei's user avatar
  • 2,145
11 votes
3 answers
10k views

Remove blur effect on lock-screen

I have a slideshow running on my desktop (which is stored in ~/.local/share/shotwell/wallpaper/wallpaper.xml) and which also is shown in the lock screen. Since 20.04, there is a blur effect on the ...
rubo77's user avatar
  • 32.8k
11 votes
2 answers
39k views

16.04 - boot stops at "A start job is running for Hold until boot process finishes up(time/no limit)

I have ubuntu 16.04 LTS running on my Pentium E2180 , 1GB RAM computer, with a 120GB SSD. I had recently installed gnome-shell, to try it out , and I got an option asking me to choose between gdm3 and ...
spark's user avatar
  • 658
11 votes
1 answer
7k views

Slow login in GDM3

I have kinda fast laptop Dell XPS 13 with SSD Computer loads and works really fast, but when I see GDM screen, enter user credentials I have a delay about 40 sec. If I lock the screen when ...
Tony Air's user avatar
  • 157

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