Questions tagged [display-manager]

A system's display manager (DM) is a graphical login manager. It is the program that starts the X server and user sessions, presenting the user with a graphical login screen (greeter). As of 11.10, the default display manager is LightDM; previously, GNOME Display Manager (GDM) was used.

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Firefox won't open without a display manager on awesomewm

This is on Ubuntu 23.04 Lunar Lobster. I disabled gdm and use .xinitrc to start awesomewm on tty1 here's my .xinitrc #! /bin/sh export DESKTOP_SESSION=awesome dbus-launch --exit-with-session $...
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How can I share my secondary monitor to a remote system as if it were directly connected to it?

Introduction A laptop typically has either a VGA or HDMI connector as a display port, and some laptops even have both. If you connect a secondary monitor to this laptop, you can easily drag and drop ...
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Why I do not have gear icon or cogwheel the sign in button on my on the login (username) page?

I have Ubuntu 22.04.3 LTS, Gnome 42.9, windowing system X11. I try to use Wayland, but I can't switch to it because I do not have gear icon or cogwheel the sign in button on my on the login (username)...
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GUI Ubuntu stuck_1

I deployed several years ago open free software Dspace 6 repository docs on Ubuntu 18.04.5 LTS desktop. I deployed Dspace on http, not on https. 1,5 years ago There was situation when The virus (https:...
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Remember different monitor configurations

Ubuntu 22.10 So, I work from home a few days a week, and have different monitor setups at home and in the office. Every time I go back and forth, ubuntu assumes the previous setup until I change it ...
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LightDM showing wrong version on Kinetic

Ubuntu Kinetic, 22.10. (Will soon update to Lunar.) Originally 13.10, upgraded via LTS versions since: 13.10 -> 14.04 -> 16.04 -> 18.04 -> 20.04 -> 22.04. I use Unity because I like it. ...
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Running without a display manager

As I understand it the display manager asks you to pick an xsession and log in. I'm running icewm on Ubuntu 22.04 an old machine and just need it to start up and start icewm automatically -- no need ...
Richard Barraclough's user avatar
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Cannot log in to session after update with gdm3

I was running Regolith (an i3-based WM) with Ubuntu 22.10. I just updated my laptop to Ubuntu 23.04 using the do-release-upgrade. After booting, I could access the login session (which is GDM), but ...
Milo Moisson's user avatar
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Display manager not working in Ubuntu 22.04 on Digital Ocean

I have running VM on Digital Ocean which runs Ubuntu 22.04, since GNOME desktop is really slow i decided to install xfce and mate but after successful installation i cannot change the display manager ...
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Ubuntu 22.04 black screen after bootup following some package upgrades

I updated the following packages via the CLI (from another device) and now after Ubuntu has booted, I am just presented with a black screen... apparmor/jammy-updates 3.0.4-2ubuntu2.2 amd64 [upgradable ...
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black screen on boot with blinking cursor after Ubuntu 22.04 kernal 5.15.0.58-generic update

Just before the restart, I have installed camorama application and its dependences such as cairo, gnome-common, libv41-dev, gdk-pixbuf-2.0, gtk+-3.0. I tried some available solutions with regards of ...
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Configuring vnc server with login screen

At this point I've researched about every forum post there is on the topic and I can't seem to at least understand why I am unable to accomplish this task. Many/most posts are several years old so I ...
Sterling Butters's user avatar
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Ubuntu 22.10 GNOME never starts: boot screen ends with "[ OK ] Started GNOME Display Manager."

GNOME was starting fine on this relatively new PC. Lenovo ThinkCenter M910Q tiny desktop computer Intel Core i7-6700T Up to 3.6GHz 32GB RAM 1TB NVMe SSD Rebooting was fine too, although it hadn't ...
Andrew Arnott's user avatar
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Difference between GDM3 in Ubuntu desktop vs. server

I have one bootable USB drive running Ubuntu 22.04 LTS desktop, and another running Ubuntu 22.04 LTS server. The former came with GDM3 by default. I installed GDM3 on the latter via sudo apt install ...
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Ubuntu on mac: No display after crash

I've been using the 2019 mac pro running Ubuntu for about 6 month with no problems what so ever (I know this sounds unbelievable but i really did). Crashed a maybe 3 times in total, but this 4th time ...
Main's user avatar
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Allow multiple users to be logged-in on the same account using XDMCP and display-managers in Ubuntu 22.04

I have read somewhere that Lightdm doesn’t support multiple users to be logged in at the same time, and that can I confirm, because when I’m trying to login on an already logged on machine, it fails. ...
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Have to manually start gmd3 after installing and uninstalling KDE Plasma

Some months ago I installed KDE Plasma, didn't like it much and uninstalled it again. Now every time I start my laptop, a black screen comes up and asks for login name and password. After that I have ...
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Why does ubuntu recognize two displays when I have only one?

I have a mouse flickering issue(still unsolved) , and think that this might be due to ubuntu recognizing two displays. I have a laptop which has amd integrated graphics and a nvidia dedicated gpu can ...
Aryan Sharma's user avatar
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How do I can manager and change and add anything(like : software) on a display manager like GDM before login user desktop?

Unfortunately, I could not get an answer, so I will ask my question again. Do the sound and keyboard settings, reset the operating system and the clock, as well as the various options of the desktop ...
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How to setup up PAM to unlock gnome-keyring

I am trying to use Ubuntu with effectively using ly display manager, however it does not seem to setup the PAM settings with Debian, I so I need to do this manually. My research shows that this is ...
run_the_race's user avatar
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After Upgrading Ubuntu to latest version, display is corrupted in many applications

Recently I upgraded the Ubuntu to latest version here is the detail: But after upgrading to this version, Chrome and some other apps are behaving strangely. for instance look at the various ...
Simple Fellow's user avatar
7 votes
1 answer
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Turn off display in Ubuntu on Wayland

I recently installed a program on my Ubuntu 20.04 machine that needs Wayland instead of X11 to work. I also frequently used the command xset dpms force off to turn of my display. However, this command ...
Chaitanya Gambali's user avatar
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Black screen problem in Ubuntu 22.04

I am using Ubuntu 22.04 LTS on my Dell laptop with [intel core i3 processor, amd-64 architecture, inbuilt graphics]. Recently I have updated my laptop to Ubuntu 22.04 from 20.04. After installing, it ...
Pravesh Kumar Sharma's user avatar
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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:...
BlandCorporation's user avatar
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Xubuntu 22.04 missing Display profiles

After a fresh Xubuntu 22.04, I'm unable to see or select Display Profiles (see image below). I'm using VirtualBox 6.1.6. Any ideas on how to make it work? Thanks!
moser's user avatar
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enable display-manager after disabling

I mistakenly ran sudo systemctl disable display-manager and I now want to re-enable it, However when I run sudo systemctl enable display-manager I get the error Failed to enable unit: Unit file ...
Sunil Kumar's user avatar
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Ubuntu crashes when not logged in (some malfunction of energy saver), no longer ssh connect

Problem: Ubuntu (18, 19, 10, 22, ...) with Gnome GUI crashes if you boot the machine and do not log into the GUI. Precondition: There is a GUI (should not apply to mere server installations) Mostly ...
opinion_no9's user avatar
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Ubuntu (20.04.2.0 LTS) boots into complete, unresponsive black screen after attempting to restart display-manager (gdm3) from command prompt

Ubuntu 20.04.2.0 LTS desktop installation: Following guidance from this post's accepted answer: How to restart X Window Server from command line? I ran: sudo systemctl restart display-manager (it may ...
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Display manager SDDM doesn't make use of 3rd monitor

I have computer with 2 videocards and 3 monitors attached - 2 to one card and 1 to another one. I run Ubuntu Server with X and I want to use most lightweight display manager as possible. I’m trying to ...
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Display manager doesn't start with fresh 20.04.3 LTS install

I just installed 20.04.3 LTS as a dual-boot beside Windows 10, and the display manager isn't starting when I boot into Ubuntu. Any idea how to fix this? Instead, I see a black screen with a tiny ...
emchristiansen's user avatar
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1 answer
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Ubuntu 20.04 with KDE - issue with resize to FullScreen

I'm using a laptop with Full HD resolution, but sometimes I need the resolution to be lower. When I try to change it using the following command: xrandr -s 1440x900 the result is not what I expect. ...
dominbdg's user avatar
1 vote
1 answer
773 views

Ubuntu cinnamon display settings doesn't run

I'm working on Ubuntu 20.04 with Cinnamon 4.4.8 desktop. Some time ago I started to have issues with my displays: they either aren't detected or the layout is reset to default one. I tried to access ...
Dune's user avatar
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1 answer
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Ubuntu 20.04 top bar weird display calendar

A picture speaks a thousand words: why is the calendar transparent and generally weird display? If the background isn't white, the calendar is unreadable I'm using Ubuntu 20.04
Wboy's user avatar
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Can not access tty terminal

My HP Probook has problems with Display manager. Basically, for now I can not access even login page (While I am on login page, I can access tty isn't it ? But it is unreachable for now). I do not ...
shzetb's user avatar
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Upgrading to 21.04 leads to "screen lock requires gnome display manager" and random freezes while inactive

I upgraded my workstation (AMD threadripper + NVidia RTX 3080) from Ubuntu 20.04 to 21.04 with do-release-upgrade. After the upgrade when I logged in, there was a popup message saying "screen ...
Florag's user avatar
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Ubuntu 18.04 with gstreamer dev version 1.19

The default version of gstreamer is 1.14 , what i need to do is to use the gstreamer 1.19. What i have tried : apt purge gstreamer issue : this will remove gdm3 the default display manager Cloned ...
Thaha Mohammed.T.M's user avatar
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Command line to restart Gnome display manger

It happens to me from time to time on Ubuntu 20.04. The screen freeze and nothing seems to work. keyboard combinations like Alt-F2 , Ctrl+Alt+F4 are not responding. logging via ssh from another ...
hans's user avatar
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What XDG environment variables should be set at boot?

Recently I got rid of my display manager and that caused Plank to not run, complaining that it could only work for X sessions. I was running an X session. Upon a bit of digging, I realised that my ...
scribe's user avatar
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control what applications go on screen

For a project, I need to be able to decide what applications appear on the screen. I want it to be controllable with basic console commands I could run from a program. I will only be showing one full-...
ICE_Plane's user avatar
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Upgrade to 21.04 - Graphic login problem + Fail to start Service for snap application ... livepattch

I am not an advance user of Ubuntu, using an old HP Envy Dv7 laptop. I am happy that finally I can upgrade my Ubuntu from 20.10 to 21.04 last night. The installation runs smoothly. Once my computer ...
John Lo's user avatar
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Strange graphics issues such as flickering application windows and inconsistent display lagging [duplicate]

My computer was acting really strange; the windows were flickering and parts of windows of different applications were partly appearing at random places. Also when I was typing, my computer seemed to ...
Ricoter's user avatar
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2 votes
1 answer
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Ubuntu 20.04 screen flickering after power loss

I had Ubuntu 20.04.02 LTS installed on my work machine for months and it worked without any problems. Yesterday the power suddenly went out in the office. After it came back and rebooting the machine, ...
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How to switch the display manager to tbsm?

How to switch the display manager to tbsm? I just installed tbsm display manager from their source, but I don't know how to switch to it, I know I can go to lightdm with dpkg-reconfigure lightdm but I ...
Parsa's user avatar
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Desktop (dual boot with windows) with AMD GPU upgraded from ubuntu 18LTS to 20.04 LTS breaks login GUI

I made the mistake of upgrading from ubuntu 18 LTS to 20.04 LTS not knowing there are (login) issues with 20.04. My computer has an AMD GPU dual boot with windows ~5 gigabytes of space left available ...
user1821961's user avatar
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139 views

How to disable the "screen locking disabled" notification in gnome 3.38?

This message pops up after every login, this started happening when I removed the desktop icons gnome extension - DING https://extensions.gnome.org/extension/2087/desktop-icons-ng-ding/ (I'm using ...
Ari157's user avatar
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2 votes
0 answers
663 views

How do I switch between users, without logging out?

I am using Lubuntu, my desktop environment is lxQt and screensaver is xScreensaver. I'm trying to figure out a way to switch between users, (e.g. when pressing Meta + L). Even though, it is possible ...
doctrineplant's user avatar
3 votes
4 answers
27k views

How do I connect Ubuntu 20.04 to a Smart-TV?

How do I connect my smart TV to Ubuntu (20.04 LTS) as secondary display, wirelessly. Can't find any option anywhere... Thanks for helping!
Urban Ego Custom's user avatar
1 vote
1 answer
789 views

Remembering Screen Brightness at Display Manager/Startup

With using linux on and off on different PC's through the years, one issue I have not been able to solve is the brightness setting during boot sitting at the Display Manager. I am running KDE version ...
Kayracer's user avatar
2 votes
0 answers
815 views

Prevent mouse from leaving screen

I would like to prevent my mouse from leaving the current screen it is on after pressing a key combination. (Multiscreen setup) On Windows, this can be accomplished by DualMonitorTools where one can ...
mkV's user avatar
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How to set HDMI output exclusively to audio and prevent it from recognizing it as a display?

I have connected my Ubuntu 20.4 desktop computer with my av-receiver to get audio output via HDMI to my sound system. This is working, but it has the side effect, that my av-receiver is also ...
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