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Questions tagged [gdm]

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

GNOME Display Manager is a program which provides Ubuntu GNOME's graphical login screen. You may also install GNOME Display Manager manually in Ubuntu as follows:

sudo apt-get install gdm # Ubuntu 14.04

or

sudo apt-get install gdm3 # Ubuntu 16.04
839 questions
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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
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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 session the display login screen is displayed…
Aravind
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8 answers

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 login box?
gruszczy
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7 answers

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
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1 answer

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 entirely?
Aero Windwalker
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7 answers

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 service" according to Terminal. How, then, do I…
user26945
58
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4 answers

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 assume that it would also be recommended to switch…
Startec
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6 answers

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
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3 answers

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
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9 answers

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. Then I restarted the PC and it didn't boot up…
Vajira Prabuddhaka
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5 answers

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 and lightdm. It was the same screen that appeared…
Tooniis
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7 answers

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 switched off. My question is how to force gdm to…
Kirill V. Lyadvinsky
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1 answer

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 GDM to lightDM?
Eduardo Pinheiro
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11 answers

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: sudo service gdm restart ... however, this basically…
sdaau
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3 answers

Multi display issue with Ubuntu GNOME 14.04

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 order in GDM is also wrong. Copy/pasting the…
chewiiie
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