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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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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 ...
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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 ...
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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 ...
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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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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!
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cannot enable display-manager

for some reason, the systemctl enable display-manager command fails: Failed to enable unit: Refusing to operate on alias name or linked unit file: display-manager.service my DE is xfce + lightdm ...
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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 ...
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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 ...
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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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How do I get dual monitors to work on Ubuntu 18.04?

I'm running Ubuntu 18.04 with GNOME 3.28.2 on my work desktop, and cannot for the life of me get more than one display to work. It has a stock AMD Radeon pro wx2100 graphics card (my work is not GPU-...
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How can I create a split-screen terminal and window manager in VNC?

I am using a Digital Ocean virtual machine with Ubuntu Server 21.04. I would like to view its GUI through a VNC app on my phone. I would like the screen to be fit to the proportions of my phone’s ...
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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 ...
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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. ...
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can't share my entire screen on ubuntu 20.04 & login loop

I have this problem When I share my entire screen this is shown as a black screen and only the pointer is shown. and also I can't share my terminal I tried many different solutions including this one ...
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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 ...
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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
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Having issues with my display

I just installed Ubuntu Budgie 20.10 and my display has been seperated into 6 different displays that area all duplicates of each other (https://i.stack.imgur.com/wUexr.jpg) This is on a Samsung ...
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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 ...
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Display manager not starting

Recently I faced a problem of not being able to control brightness on my laptop so I made a file in /usr/share/X11/xorg.conf called 80-nvidia.conf and pasted something I found online which is clearly ...
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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 ...
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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 ...
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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 ...
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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 ...
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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-...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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? Cant find any option anywhere .. Thanks for helping! Achim
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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 ...
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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 ...
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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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applications have a different theme when run as root in lightdm

I changed lightdm's default theme and icon set to Flat-Remix-GTK-Dark and Flat-Remix-Green-Dark respectively. which looks like this: problem is when I run programs as root, which then they seem to ...
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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 ...
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Kubuntu 20.04LTS on Acer Aspire A515-43-R19L not displaying properly until I log out and back in

I just bought the A515-43-R19L Acer Aspire 5 laptop and went to install Kubuntu. I added a SSD to the laptop which has Kubuntu installed, the Windows 10 installation is still installed in the built in ...
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Ubuntu 18.04 stuck in tty

I'm not able to start my GUI. I exited from some server via exit command after which I restarted my computer and then it moved to tty console. error after restarting I tried following solutions: ...
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LightDM theme is not acting normal

fellow Ubuntu Enthusiasts! I recently installed LightDM via sudo apt install lightdm and then installed lightdm settings tool via sudo apt-get install lightdm-gtk-greeter-settings And now, LightDM ...
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Troubleshoot Ubuntu 20.04 display freezing

Display on Ubuntu 20.04 has been freezing at apparently random moments. Machine under no memory or CPU pressure. Mouse moves, but no input accepted from mouse or keyboard. I have tried: Restarting ...
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content on all 4 sides of my Sony TV are cut off when connected via HDMI to be a second monitor

I have connected a sony TV to my laptop through HDMI port to use as a second monitor. But, content is being cut off on all four sides are cut off like shown in images below: top-left: bottom-left ...
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Can I adjust the White Balance/Color Temperature (hardware) settings of my monitor?

I know that one can do quite much programatically (shell commands) to the attached monitor hardware in Linux: turn it on/off (truly, hardware-wise) with xset dpms force off toggle the brightness (...
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Unable to share entire screen

I have Ubuntu 20.04 and I tried DWM window manager with the XDM display manager for a weekend but I didn't have the time to adapted to my style because I started classes at the university again. I ...
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Dual screen option is not showing in Settings → Devices → Displays in Ubuntu 18.04.4

I am using ThinkPad L490. In my Settings → Devices → Displays, display mode or dual screen mode option is not showing. Please refer screenshot:
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Running multiple monitors with different DPI

I look thoroughly and I saw that this kind of question was not solved before in the AskUbuntu community. My problem is pretty simple and am sure a lot of Ubuntu users have it: Simply explained, ...
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Failed to start lightdm (stuck on bootloop)

Currently I was using kde on ubuntu. But after trying to install cinnamon and lightdm, I can't start my OS. It is stucked on boot logo. And it's showing, "failed to start lightdm". I tried ...
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Boot lubuntu 20.04 into command and not gui

So I have been using debian, raspbian and ubuntu, and I'm used to 'systemctl disable/enable lightdm' and 'systemctl start/stop lightdm' when I setup a server so I only use the gui when necessary. I ...
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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?
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