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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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Why gdm3 don't start on boot no more?

Since i tried to change some driver and configuration for my GPU, gdm3 don't start on boot. Boot stop on the dell logo and i have to open a tty session and start gdm3 service manually. Then everything ...
tottilafrite's user avatar
0 votes
1 answer
1k views

GDM screen icon theme?

Does anyone know which file configures the default icon theme (indicator and status icons) used in the top bar of the GDM screen on Ubuntu 20.04? I looked inside the /usr/share/gnome-shell/theme/Yaru/...
Enterprise's user avatar
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1 vote
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How to play a video before/over top of GDM in Ubuntu 20.04?

On my PC running Ubuntu 20.04, I want to play a video before GDM starts/over top of it. Not after logging in, but that. Is there any way to make Ubuntu autoplay a video in the plymouth screen before I ...
Frekkelsaurus's user avatar
1 vote
0 answers
969 views

Screen goes crazy with noise and ubuntu freezes

Description: Ubuntu screen gets crazy with black and white "noise", this has happened several times. It seems that Ubuntu is also frozen in this state because I cannot connect with ...
1618's user avatar
  • 511
2 votes
1 answer
611 views

Set user SystemAccount to false

I have the same problem listed here. But when I change the SystemAccount property to false and reboot, it is set back to true. Even if I only logout the property is set back to true. I also tried ...
tommasop's user avatar
  • 171
0 votes
1 answer
84 views

Getting issue with display on Ubuntu 18.04.4

While running docker for scraping/splash, I kept getting notification of "Empty Trash" which indicated that the disk was out of space. After few seconds,GUI got stuck. I powered of the ...
Danyal Mughal's user avatar
1 vote
1 answer
602 views

problem with ubuntu booting

I guess I ran some command trying to install something. After that, when I tried to restart my PC, it showed error while reading block run fsck manually which I did. After that, it was stuck in ...
Subham Sahoo's user avatar
3 votes
1 answer
2k views

What is the difference between GNOME desktop and Ubuntu in SDDM?

I installed Kubuntu on my machine, and then decided to try the regular GNOME desktop. Thus I installed ubuntu-gnome-desktop and logged in from the welcome screen running SDDM. This has been a ...
Diego-MX's user avatar
  • 608
9 votes
3 answers
10k views

why am i getting ' event processing lagging behind' msg in Ubuntu 20.10

seeing my system logs, they are full of msgs like this: /usr/libexec/gdm-x-session[2564]: (EE) event4 - SIGMACHIP USB Keyboard: client bug: event processing lagging behind by 25ms, your system is too ...
pdeva's user avatar
  • 151
2 votes
1 answer
2k views

Can't logon to xfce4

I'm using Ubuntu 18.04 bionic and installed the xfce4 package. However, when I choose "Xfce session" in the login manager, it does not log me on to Xfce4 but instead throws me right back to ...
stdcerr's user avatar
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0 votes
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Need help to fix the below packages error

zeppelin@ubuntu:~$ sudo apt full-upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done The following packages were ...
Husain's user avatar
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0 votes
1 answer
2k views

Login only via Ubuntu Wayland possible and User is missing in Login List, Ubuntu 20.04

After update from Ubuntu 18.04 to 20.04, all works fine. My notebook has two users there have access to the client with a separate user profile. After Unsubscribe from my profile, is it impossible to ...
bueltge's user avatar
  • 325
0 votes
0 answers
855 views

How do I stop xserver but still have a terminal/display to run stuff?

Hi i've looked at some other questions on stopping GDM/Lightdm to run stuff (Nvidia installs/patches) but my problem is using service stop gdm or init 3/init 5 just leave my screen with no connection ...
Cyan101's user avatar
2 votes
0 answers
672 views

How can I add a splash screen to gnome 3.36 Ubuntu 20.04?

My gnome takes 30 seconds to load(I know this is rather long but it's a low end pc) and staring at a purple screen the whole time sometimes gets boring. How can I add a custom splash that would show ...
Regern Faraja's user avatar
0 votes
1 answer
236 views

I can not use ubuntu with the gdm disabled

Hello everybody this is my first post here I'm new to linux. Here's my problem when I disable the gdm (with this commandsudo systemctl stop gdm) to have only a console interface, my screen goes ...
Sutekina's user avatar
3 votes
1 answer
117 views

Might modifications to scripts in "/etc/gdm3/" be overwritten by updates?

I modified /etc/gdm3/PostSession/Default. Is there a risk that a GDM update will revert my changes? This is especially of interest because the systems with the modified scripts run unattended upgrades....
Thomas W.'s user avatar
  • 480
3 votes
1 answer
1k views

Ubuntu 20.04.1 LTS - Mouse removed and added intermittently

update: The same problem occurs in 20.10 with kernel 5.8. I'm having a mouse hiccup that comes and goes where the mouse becomes unresponsive where the device is deleted and added again by UDEV. See ...
bol's user avatar
  • 39
1 vote
1 answer
1k views

Gdm new user set default desktop

With gdm preferred, how do I get the new user to log in as cinnamon desktop instead of gnome desktop?
nakrerkan's user avatar
2 votes
1 answer
2k views

Ubuntu 20.04 always forces me to create a new user at boot

I have newly installed Ubuntu 20.04, customized GDM3, installed my needed software and everything appeared to be successful. However, when I reboot, Ubuntu asks me to create a new user for some ...
emc2's user avatar
  • 79
0 votes
1 answer
698 views

Gnome login screen only displays on LED TV

I have an issue were when I boot up or logout the default gnome login screen will only display on my LED TV (which is normally off) connected to my graphics card. How do i ensure that the login screen ...
SpacemannGaf's user avatar
0 votes
1 answer
3k views

gnome-shell freezing (and gdm restarting)

I have a problem with gnome-shell and gdm. My shell sometimes (not reproducible atm) freezes. Under some circumstances gdm will be restarted and I am logged out and all programs are killed. When ...
Eike's user avatar
  • 169
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
1 vote
0 answers
35 views

How do I disable the guest user without lightdm? [duplicate]

In versions of ubuntu above 16.04 the default display manager is gdm3. I am attempting to remove the guest user from an ubuntu VM but I don't know how to do it without lightdm. How do I do this? I ...
lkotlus's user avatar
  • 32
3 votes
2 answers
2k views

GDM cannot show user after upgrade to 20.04

I just upgraded from 18.04 to 20.04 on my workstation. It uses LDAP authentication. I already have an authenticated user. It used to be shown in GDM prior the upgrade. However after the upgrade only ...
Alper Kanat's user avatar
2 votes
0 answers
5k views

After system boot, many processes belonging to `gdm` user are created

My Ubuntu 20.04.1 notebook is a fully up-to-date Ubuntu desktop installation upgraded from previous versions (18.10 -> 19.04 -> 19.10 -> 20.04). Lately, I noticed that a "system user&...
FedKad's user avatar
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3 votes
0 answers
2k views

Ubuntu 18.04 crashes with EXT4-fs error and systemd-journald

Oct 22 Update: I changed my SSD two weeks ago from LITEON CV3-8D256 to Samsung 970 Evo Plus, and the problem described below hasn't happened since then. I suspect the problem was due to the ...
Simon's user avatar
  • 31
1 vote
0 answers
498 views

Ubuntu login screen customization - show an animation when correct credentials are entered

I know we can customize the Ubuntu 20.04 login background, however I want to develop something slightly different. I would like, when the user enters a correct login and credential and then click the ...
mika's user avatar
  • 23
1 vote
1 answer
4k views

Change Ubuntu 20.04 login theme

I want to use Materia theme as my login screen (gdm) theme. I used loginized app for changing the theme, I used it on arch and it worked well. But it is not working for ubuntu 20.04.
Mansoor Ahmed Memon's user avatar
0 votes
0 answers
290 views

How can I use SSH as a domain controller?

I would like to use SSH as a domain controller instead of samba as the lab is only running 8 Ubuntu computers and 1 Ubuntu server. Is there a way to get Ubuntu to do this at GDM or after a user logs ...
james curtail's user avatar
1 vote
0 answers
854 views

Must do Ctrl Alt F1 to be able to start graphical session

I recently installed Ubuntu 20.04 using a mini iso. I added gnome-session firefox and some other things. For some reason, when starting the PC I only get a black screen. If I press Ctrl Alt F1 I see ...
Pablo Posso's user avatar
0 votes
0 answers
859 views

Custom GDM3 Logo In Ubuntu 20.04 (With GNOME Shell Theme)

I'm Ronaldo, I'm having a serious problem, I installed the fresh ubuntu 20.04 LTS, I also installed the GNOME vanilla, and the GDM3 Also, then I changed the theme of the GDM3 yaru to gnome shell, with ...
Ronaldo Pereira's user avatar
1 vote
1 answer
2k views

Search your computer => "Sorry, there is nothing that matches your search."

Switching from GDM (GNOME Display Manager) to LightDM on Ubuntu 20.04 LTS broke "Search your computer" functionality. Fix found: apt install ubuntu-unity-desktop apt remove gnome-shell dpkg-...
Erkko's user avatar
  • 25
2 votes
0 answers
1k views

Unable to log into 20.04 -- How do I fix Fbcon?

Noob here. I messed something up when I tried to install Linux Homebrew and now I'm unable to log into my main desktop (I get kicked out when I correctly enter my credentials). I've since uninstalled ...
Visipi's user avatar
  • 21
3 votes
1 answer
2k views

change GNOME 3.36 gdm3 lock screen (screen shield) font colour - what css selector to target in gdm3.css?

I am aware from other posts that you can change e.g. the login screen background by modifying the css selector #lockDialogGroup in gdm3.css that you get when extracting the .gresource binary. What is ...
Zegheim's user avatar
  • 33
0 votes
1 answer
1k views

Ubuntu 18.04.4 LTS stuck on black screen 2 days after OS being installed (won't start GDM or lightdm)

I installed ubuntu 18.04.4 LTS 2 days on a desktop with intel processor and integrated VGA, and was downloading and configuring everything how I liked, including xubuntu-desktop, but I was using gdm3. ...
Tiago Mendonça's user avatar
1 vote
0 answers
510 views

Some issues in logs after the upgrade to 20.04

I am a newbie in ubuntu, and would be most grateful if you could help me in an appropriate manner, please, if you can. I have upgraded the 18.04 system to the 20.04 version on my v3-471G acer aspire ...
Sasha Smith's user avatar
0 votes
1 answer
775 views

Cannot open log file Xorg.pid

I encounter serious problem. When I am trying to login to my LDAP User, gdm doesn't start my user session and want me to log in again. I have connection to LDAP Server I can login to that account on ...
Eddy's user avatar
  • 101
8 votes
1 answer
4k views

How to diagnose/stop gdm-x-session spamming syslog

[Note: this is similar to issue #418 in the gnome gitlab but it happens to me constantly and I'm not running Evolution. I filed this there too, but gnome 3.28.2 is no longer supported there.] I'm not ...
turix's user avatar
  • 81
3 votes
1 answer
229 views

Mysterious image on first boot lock screen

I'm using Ubuntu 20.04 and noticed a weird behavior. When I select a wallpaper image, it is selected for both lock screen and background wallpaper, but on every first boot I see a mysterious image. I ...
taq's user avatar
  • 31
2 votes
0 answers
37 views

Why is my ubuntu display manager doing this?

I rebooted my ubuntu machine and this happened with my display manager - the options on the sidebar jumbled together. How can I fix this?
Oneiros's user avatar
  • 121
4 votes
4 answers
21k views

gdm3 not starting on ubuntu 20.04

I recently upgraded from Ubuntu 18.04 to 20.04 as I was having this issue as well (with a different error). I was hoping upgrading would fix it. After upgrading Ubuntu worked a few times but now it ...
danbeggan's user avatar
1 vote
1 answer
2k views

TTY startx runs different GUI than graphical.target

I recently setup a live Ubuntu 20.04 stick. This is the first time I'm trying Ubuntu, but I am somewhat familiar with the system because I have a RaspberryPi running Raspbian. Everything works great. ...
Travja's user avatar
  • 11
2 votes
2 answers
1k views

How can I uninstall or disable a gnome extension in an encrypted user home directory?

After installing the good-bye-gdm-flick GNOME extension on 18.04.4, I am no longer able to log in. After logging in, only a purple screen is shown (mouse cursor active). My next course of action would ...
nilo's user avatar
  • 31
2 votes
1 answer
440 views

Can no longer lock my screen on Ubuntu 20.04 with vanilla GNOME, how to debug?

Background: I am using vanilla-gnome-desktop on a Ubuntu 20.04 which was installed from scratch. What was not done from scratch was the user profile. It got ported from another machine. Now for some ...
0xC0000022L's user avatar
  • 5,722
3 votes
0 answers
469 views

How do I make GDM run ~/.xsession? [duplicate]

I need to run my own session script without changing any system files. In older Ubuntu versions I was able to create a ~/.xsession script in my home directory containing all session initialization ...
Fernando Silveira's user avatar
1 vote
0 answers
927 views

No desktop, only tty, sudo startx doesn't work

I am using Ubuntu 18.04. The problem is I have no GUI, stuck in tty... I can't run apt-get update and there is no internet in tty. When I run sudo startx it is showing this: marker: (--) probd, (**...
Atish Antu's user avatar
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
1 vote
0 answers
312 views

lock screen when screensaver is deactivated? gdm3

Is it possible to lock screen AFTER screensaver is deactivated in dgm3? I was using lightdm/light-locker what had this setting Ubuntu LTS 20.04 GNOME 3.36.2
dk1's user avatar
  • 41
1 vote
0 answers
4k views

"System program problem detected" Ubuntu 20.04

After upgrading from Ubuntu 18.04 to 20.04 following error message appears after logging in to the desktop. How can I find the underlying problem? I know apport can be disabled but that will be a last ...
Maximus's user avatar
  • 11
0 votes
3 answers
7k views

gdm3 login loop, lightdm works in Ubuntu 20.04

A lot of people seem to have this issue, and many people have been able to fix it, but I have used every fix (besides reinstalling Ubuntu or creating a new user and moving stuff over) and have not ...
Everett Flynn's user avatar

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