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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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Ubuntu Budgie 22.04 disable users list

I've just installed the pretty Budgie 22.04 on my workstation. Users list comes from SSSD Ldap integration, but only local users show in login screen. I've tried various things to hide the users list (...
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user logs out but does not get a new login screen

users, A strange problem appears on my system, but not always: There are four users: me and my three sons. They somehow succeed in logging themselves out and then the login screen disappears. The ...
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3 votes
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163 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 ...
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resizing snapped windows together with ubuntu

I want to be able to snap two windows together, then when I click on the border of the two windows and drag left or right, resize them as a whole, that is, if I resize the window on the left 50% ...
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When installing various desktop environments, how can one prevent user interactions requesting a selection of display managers like LightDM and GDM3? [duplicate]

I have a Bash setup script for Ubuntu. It is intended to be designed to minimise the user interactions needed to get to a fully set up system. In the script, there might be commands like the following:...
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2 votes
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Cannot login second user after "switch user", but can if using Ctrl+Alt+F1

For at least a year or so I have had problems with the "switch user" function on Ubuntu. If I log in (whether as "user1" or "user2") and click "switch user" I ...
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Unable to boot 20.04LTS ~50% of the time with NVIDIA 3090

Z960-Prime NVidia 3090 FE Intel i7-12700F This issue persists on multiple clean installs on a 1TB WD NVME drive, with and without using the optional propreitary drivers requested at install and no ...
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Ubuntu 22.04 Install Stuck at gdm.service

I'm trying to install Ubuntu 22.04 LTS. When I selected "try or install ubuntu", my computer never even showed me the install screen. Instead it is stuck at "gdm.service". Can ...
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gdm-password's child process Xorg makes my computer sluggish after suspend

Suspend and resume makes my system sluggish. The CPU load itself is not that much (10 %), but it's more than noticeable, I see it only moving the cursor around. Logging out and back in does not solve ...
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Failed to prepare CRTC for page flipping, disabling TearFree

I have the following issue: My laptop is suspended and connected via Thunderbolt to by Docking Station. When I press a key to wake up the laptop the external monitor (connected via the dock) turns on ...
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Automatically select gdm3 as display manager [duplicate]

I'm using this command to install xfce4: apt install -y -o Dpkg::Options::="--force-confold" xfce4 xfce4-terminal And I got a prompt similar to this one: How can I avoid this dialog and ...
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Don't boot shortly after upgrading to 20.04 - but can launch startx manually on recovery mode

Using Kubuntu with Gnome installed (I think this is Ubuntu with extra steps but it's work computer, I did not choose flavor) Computer is Lenovo T440P with 16 Go RAM (Core i5, integrated GPU) Upgraded ...
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  • 101
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Can't install gdm3 ubuntu-desktop

Image of the problem: I received this msg while trying to install gdm3 as I had a problem it was removed and I don't know how. It says The following package have unmet dependencies: I dont ...
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Errors prevents launching of gdm in 21.10

Installing gdm3 on Ubuntu 21.10 leads to the following errors: $ systemctl status gdm3.service ● gdm.service - GNOME Display Manager Loaded: loaded (/lib/systemd/system/gdm.service; static) ...
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Dummy monitor in 21.10

Until 20.04 I was able to create a fake monitor for remote access of an headless machine in this way: $ sudo apt install gnome-session gdm3 $ sudo systemctl set-default graphical.target $ sudo apt ...
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Ubuntu 20.04 somehow starting 2 users?

I have Ubuntu 20.04. I was trying to setup chrome remote desktop and then after I set it up and try to connect I had to choose session it was black screen and when I restarted my computer I prompted ...
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Something has gone wrong even if the upgrade was successfully

There are tons of questions about this error but almost all of them refer to interrupted dist-upgrades. Instead, I've upgraded from 20.04 to 21.10 without any problem (at least, no popups that show ...
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1 vote
1 answer
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Ubuntu 20.04 Hangs when Unlocking

The problem manifests as follows: I walk away from my computer, come back about 15 minutes later to find that the screen has gone black and the computer has locked (as expected). I tap the space bar ...
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0 votes
1 answer
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How to use Wayland for the gdm login screen?

I'm on Ubuntu 20.04 and would like to use Wayland as the GDM login screen, to avoid the gnome-shell owned by gdm consuming my RAM. WaylandEnable=false is disabled in my /etc/gdm3/custom.conf
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1 vote
1 answer
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Dozens of gdm-session-worker [pam/gdm-autologin] processes

I have a non-server Ubuntu installation which I mainly use as a headless server. I don't remember what was the first version installed (there were several major upgrades) but right now I'm using the ...
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2 votes
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Active Directory SSSD - Change Password on GDM login Screen

Looking to see if I can expand the capabilities of the SSSD/AD system with GDM, or SDDM. We want users to be able to change their Active Directory password through our Ubuntu machines, if their ...
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Stuck at blank purple screen after login Ubuntu 20.04

After logging in after a reboot, it just removes the login window thing and gives a blank purple screen with a mouse cursor instead of my desktop. I can ctrl-alt-f2 and then ctrl-alt-f1 back and it'll ...
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wayland login loop after moving $HOME to new SSD

TR;DR I moved my home dir to a new SSD and manually changed owner to my user. Now I cannot log into wayland unless I log in to Xorg session first. I moved my home directory to a new SSD using rsync -...
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Ubuntu login slow in SSD after changing login background to wallpaper

I have ubuntu 20.04 installed on ssd along with windows 10 dual boot. After I used this tool to change the login screen background to a wallpaper, it takes much longer for login to complete than ...
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When I suspend Ubuntu 20.04 with running GDM3, it turns to black screen with no cursor and no mouse-pointer

When I close my laptop's cover, it suspends. But when I open it, it is blackscreen with no cursor or mouse-pointer. I tried sudo apt reinstall gdm3, but it does not work.
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Ubuntu 20.04.3 LTS - Xorg remote connection refused on port 6000

I'm having this error when I try connect (Windows >> Ubuntu). connection refused on port 6000 I have no idea how to configure Xorg to accept connections on port 6000. /usr/bin/X #!/bin/sh # # ...
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2 votes
0 answers
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Starting X-server with different configs for different seats with gdm3

I have PC with two video cards. I want to use multiseat: 1 seat is local 2 seat is remote (with xserver-xspice package) There is no problems with lightdm display manager, i can specify x-server ...
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ubuntu doesnot diplay the login screen when "join display" is select and there is only one monitor

I spent a night to debug why the login screen is not showing up. I was able to blindly type in my password to login to a colored background but empty screen. The problem persisted after I upgraded the ...
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1 answer
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Boot hangs when starting gdm.service

The problem is that it suddenly hangs once the service gdm.service starts. I know this because I have set it to display the processes instead of the splash screen and the last thing that comes on the ...
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1 vote
0 answers
352 views

gdm3/gnome does not start/crashes

I installed Ubuntu 20.04.3 (Gnome version 3.36.8) on two different systems (one desktop, one laptop). On both systems after the first boot the login manager does not come up and I have to login via ...
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2 votes
2 answers
467 views

Black screen after sudo systemctl stop gdm

I had a problem with my NoMachine Programm so I decided to use the possible solutions from their website: https://knowledgebase.nomachine.com/AR03P00973 I tried the commands in the graphical desktop ...
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1 answer
113 views

Distortion and tearing effect on internal 4k screen (HP elitebook laptop) with gdm/lightdm

I have a weird distortion and flickering effect happening when embedded videos (inside text content) are running in web browsers or when I scroll in any sort of scrollable content (e.g., webpage, ...
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Monitor standby after login

I just switched to Linux and I have an annoying issue. When using two monitors (main monitor and TV) after login my main monitor turns off. The only way to turn on the monitor is by starting the TV. ...
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Execute script every time a user login/logout using a service (gdm)

I'm a newbie in linux and I'll be glad for any help. I'm using gdm and I want to execute a script **every time** a user login/logout . To see that the mechanism works, I tried at first to execute the ...
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0 votes
1 answer
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Custom gdm session logs me out on Ubuntu 18.04

I have a requirement where a sandbox user only needs to see a single application without running Gnome or any DE at all (basically a kiosk setup). I created a new .desktop file in /usr/share/xsessions,...
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7 votes
4 answers
1k views

How do I stop the GUI (in Kubuntu 21.10)

I need to stop the GUI and access a TTY for the NVIDIA drivers. I found this question. However, when I tried sudo service lightdm stop (or the same with gdm), it said this: $ sudo service lightdm stop ...
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1 vote
1 answer
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autostart is delayed? takes around 90s

After login i expected my autostart apps to immediately start, but they seem to only start after about 90s. I tried googling but all i see is people who want to delay apps in startup... i was looking ...
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1 vote
1 answer
72 views

How to navigate gdm3 login manager with keyboard shortcuts

Pretty much I want to know how to access the cog-icon with a keyboard shortcut. Is there a way? (Everything I know about Linux tells me there should be and probably is.) I know this is a question that ...
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How to create ZFS home dirs using pam_exec

How do I get pam_exec.so to create a new home dir ZFS dataset for each user who logs in via GDM/LDAP? I'm running Ubuntu 20.04, using GDM and nslcd for LDAP auth. pam's mkhomedir library doesn't have ...
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1 vote
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GDM logout script doesn't write to a file

I'm trying to write a logout script that will be executed when a user graphically logout. For this purpose I've added the script into the file: /etc/gdm3/PostSession/Default In the script I'm writing ...
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0 votes
1 answer
118 views

Ubuntu gets stuck in a login loop unless a different user logs in

I'm trying not to make a duplicate of a previous question, but I do have the same problem. I'm using gdm3 and have purged, and reinstalled multiple times. A different user 'test' and sudo startx work. ...
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Unable to go to bios settings and stuck at gdm.service [duplicate]

Logged off from my Ubuntu 20.04 and restarted the system. When I'm trying to check bios settings, my system is getting stuck at gdm.service Stuck at gdm.service I tried to plug my usb drive and usb ...
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-4 votes
2 answers
444 views

Upgrade from 18.04 to 20.04 causing many failures

I upgraded Ubuntu 18.04 to 20.04 and now everything is broken. apt doesn't work.keep getting dpkg errors when trying to use it. cant install anything. nautilus and terminal doesn't work. lots of icons ...
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1 vote
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How to disable Username-input field (StEntry) Ubuntu 20.04?

Is it possible to hide or disable the input-field for Username in the logon screen on Ubuntu 20.04 - making it "impossible" to type into the field for a period of time? Reason for this is to ...
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GDM3 does not start at system boot after upgrade from 18.04 to 20.04

After the upgrade, I get the default logon screen (not gdm3). From a terminal, when I issue sudo systemctl status gdm it says "dead". Then, if I issue: sudo systemctl restart gdm3 the GDM ...
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2 votes
0 answers
403 views

Purple screen after upgrading to Ubuntu 21.10

Couldn't log in because the gdm3 login screen has no password field, see screenshot: The unability to switch from current session to the TTY3 text console (Ctrl+Alt+F4 or F3 didn't work here) forced ...
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Using Smartcard Insert Event to Bypass Username Prompt in Greeter

I'm switching over from CentOS 7 to Ubuntu 18.04 and setting up smartcard login. The smartcard login using pam_pkcs11 with opensc works just as well as it did in CentOS, but the greeter in CentOS (GDM)...
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1 vote
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124 views

Display manager doesn't load desktop and instead shows a black screen for 5 minutes after entering login info. then loads after the 5 minutes

After I get to the login screen from a reboot, once I enter my password and login, instead of getting the desktop, I get a completely black screen for exactly 5 minutes, once those 5 minutes have ...
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gdm.services sometimes stop working when booting to ubuntu

I have a dual boot (win 10 + ubuntu). when booting to ubuntu sometimes it hangs on gdm.services by the way, I use the tweak tool to change the looking of the shell and to add themes. I was unable to ...
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1 vote
0 answers
253 views

Cannot install A GUI in my computer

I am on Ubuntu 20.04. Whenever I try to boot up my computer I get nothing only black screen. If I press ESC, then I can see only /dev/sda2 clean, etc. Nothing else. It looks like there is no GUI on it....
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