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Questions tagged [display-manager]

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Ideal Disto/software combination for mitigating severe migranes due to screen and backlight refresh, and open GL

I am looking for a visual accessibility focused DE or distribution to help a friend with severe migraine and nausea issues using displays, OS's, and apps, starting in 2014 with the Mac Os move to ...
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50 views

kwin_x11 becomes defunct after restarting display-manager

I am running into an issue that after stopping and starting display-manager through systemctl the original kwin_x11 process will become a zombie. (I am doing this to run a VM with a single passthrough ...
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2 votes
1 answer
141 views

can someone explain what is this non-clickable permanent window called @!0,35;BDHF always open on wayland?

Pop!_OS 21.10, amdgpu, ryzen 5 4500u, issue only on Wayland. Linux 5.15.5-76051505-generic snap attached below (i couldn't even screenshot that thing).
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1 answer
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Using a builtin GUI in openSUSE

I want to browse the internet with firefox and found that there was no DISPLAY environment variable and I also had the following message : You did not install any X-Server (e.g. Xorg)! Please install ...
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1 vote
0 answers
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Kernel error when external display connected. Needs to be reconnected several times

About 50% of the time when I connect my LG external monitor to my x1c7 laptop, the displays are both on and working, but I can only see my mouse and nothing else. It flashes every few seconds like it'...
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3 answers
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Enable a generic user to start X

I have Debian, Sid if it matters, and I'd like to start X from the console, rather than using a display manager, but when i type startx <RET> I receive the following message xinit: connection to ...
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Using ly as my display manager and disabling gdm3?

I'm currently on Ubuntu, using a virtual machine, and am trying to use ly as my display manager.Whenever I try to run sudo systemctl ly.service inside of the ly directory on my computer, I get an ...
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Running GUI solution on top of ANY display manager login/lock screen on Ubuntu 18.04

I'm back with follow up question to the same topic I created last week. Short background story I started creating PAM python 2FA RFID authorization solution, that would work on SDDM login/lock screen, ...
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2 votes
1 answer
910 views

How to get BIOS Device Name from Linux, same as Windows Device Manager format

My laptop has a display adapter and from Windows 10 I can see its BIOS Device Name from.. Device Manager > Display Adapters > Properties > Details > "BIOS device name" And from ...
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2 votes
0 answers
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Multiseat Setup: Disable display manager and use TTY on one seat

I have the following setup (HP Microserver 8): Integrated Matrox G200eH connected to Integrated Lights Out (the PH Remote Management Console) which also simulates an integrated keyboard to the system ...
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289 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 ...
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752 views

Live USB KDE Manjaro stuck at 'reached target graphical interface' 3060 ti

Then i can alt-f2 and log in without graphical interface and mhwd -l gives bunch of "...MHWDCONFIG is invalid" Is 3060 ti too new right now? What to do? tried nouveau.nomode=0 but same ...
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1 vote
0 answers
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XFCE Display manager hangs after applying settings

I often have the problem that display-manager appears to hang the UI thread after applaying some settings (like disabling a screen) (see screenshot), and thus i cant click the "Keep settings"...
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1 vote
0 answers
301 views

Run X11 programs and render on cloud machine without a physical screen

I am trying to run a program that uses X11 to display (assume xeyes or something similar) on a machine in the cloud (ec2, Compute Engine, etc). I understand that I can get the windows to show up on my ...
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2 votes
0 answers
307 views

How to configure environment variables per graphical session

Consider the following setup: I have GDM installed I have multiple graphical sessions configured, both X11 and Wayland: i3, sway, gnome(x11). I want to export different sets of environment variables ...
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2 answers
1k views

No GUI error after installing debian buster

I have installed Debian 10 on my laptop Dell Inspiron . But when booting first time into Debian, It directs me into the command-line interface, why? I am sure, I have chosen Graphical Install during ...
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3 votes
0 answers
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Set certain desktop environment as default, and revert back to it after reboot

first of all, let me put a few things out of the way: I'm about to manage a few (semi-)public workstations with Linux Mint 20 that a lot of different people have access to. And you know people; they ...
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2 answers
347 views

Is Wayland display server a userspace process?

For X11, I can see the display manager gdm3 (indirectly) launches a process named Xorg, which is the display server. However when using gnome on wayland, I do not see any children (or grandchildren) ...
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QtCritical: Could not connect to any X display

Installed copyq on Debian 10. When root@engelsmann-vaio:/usr/lib# copyq I get the error message: QtCritical: Could not connect to any X display. (:0, ) root@engelsmann-vaio:/usr/lib# env gives me ...
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1 vote
0 answers
345 views

Ubuntu using LXDE taking too long to shutdown

I have Ubuntu 20.04 and my desktop environment is LXDE. When I try to shutdown my computer the system keeps waiting and there is a message: A stop job is running for Session c2 of user ... (1min 30s) ...
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2 answers
1k views

How do I find out the display manager info on Fedora 32 Mate?

It's my first time to use Linux, Fedora and Mate environment. I want to change the default login screen (mainly the background), but I couldn't find the way to do it. I have done some research, and ...
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1 vote
2 answers
8k views

Sddm is not starting but in theory everything is working!

It wasn't a long time ago when I decided to start an adventure with Linux. I started with a virtual machine (VMware workstation Pro) and everything worked fine. I've picked Debian 10.4.0 distro with ...
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0 votes
1 answer
216 views

XDM loops while given correct username and password

I just installed XDM to set up a proper login screen on Archlinux, but it seems I did it wrong. Indeed, XDM starts and prompt a thing I guess is the default login screen, but when I enter my password/...
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How to know if my computer supports a triple monitor configuration?

I'm currently ruining manjaro KDE and trying to setup three monitors. my laptop has an HDMI output and a VGA one and I would like to use both to setup two additional screens but I seem to be able to ...
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0 votes
1 answer
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Controlling the X display manager service - on SLES 15

I'm not a fan of systemd, and have so far worked with systems which used SysVInit scripts (like Devuan); and upstart on older Ubuntu versions. Now I'm "stuck" with a SLES 15 machine. I'm trying to ...
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1 vote
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panel is covering windows

I'm currently running Ubuntu 18.04.3 LTS and sometimes the panel covers the bottom of windows where I need to access the buttons on the bottom. I'm trying to do a restore using timeshift because of ...
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0 votes
2 answers
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During boot my ubuntu box switches into graphic mode, but there is no window manager installed. How can I disable this?

Grub gives me two options, boot Ubuntu and boot Ubuntu Rescue Mode (or something alike). When I boot Ubuntu, I get to the point where dmesg gives green timestamps, but just before a login prompt would ...
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1 vote
0 answers
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How to get rid of nag screen "Authentication is required to set one's own greeter properties"?

After a recent update on my Linux system I get a dialogue window every few (5?) minutes with the same message: Authentication is required to set one's own greeter properties. It has a password ...
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1 vote
1 answer
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Two WMs simultaneously

I want to use two Windows Managers simultaneously. As I know that using two ttys for this isn't going to work (I'm on Arch and systemd-logind revokes access to hardware when switching), I am searching ...
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3 votes
1 answer
811 views

How can the shadows around windows be removed from Mate with Lightdm?

There is a shadow around each window in Mate. If it matters I run Lightdm. How can the shadows be completely disabled for all windows regardless of the application?
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8 votes
2 answers
8k views

Prevent lightdm from turning off screen when locking session

I am running Xubuntu 18.04. When I lock the session, the screen gets turned off instantly. I am using stock lightdm as display manager and lightlocker for locking the session. From my viewpoint the ...
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1 vote
0 answers
579 views

Display managers don't log me into my user account

I have been using Arch Linux for more than 5 years now (and linux for about 10 years). Never had such a problem. Searching the internet also did not reveal any answers to this ---- Here are the ...
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3 votes
1 answer
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Disable all display managers in (systemd based) ubuntu

How can I disable all installed display managers in ubuntu (18.10 or later) without removing them? In my case gdm3 and sddm are installed and I tried: sudo systemctl disable sddm -f sudo systemctl ...
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1 vote
2 answers
1k views

What order does window manager, display manager, login manager execute

I am trying to understand what is the use of Xorg. I got confused with lots of words like window manager display manager login manager etc. After that i got some links in stackexchange Terminology ...
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1 vote
1 answer
783 views

Set DM on OpenRC

How do I set a display manager on an OpenRC system? I'm trying to use the Ly display manager. E.g. on a systemd distro I'd do $ sudo systemctl enable ly.service but how do I do it here?
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1 answer
1k views

Is there any terminal tool where you can zoom in and out the screen?

So I know there's zooming tool in universal access menu in Ubuntu, but currently I can't find how to operate it through command line, plus it can't zoom out. My second attempt is use xrandr --output ...
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1 answer
311 views

Is there a login / display manager in Linux with a config GUI for setting wallpaper (NOT editing config files by CLI)?

I have looked and not found one. I'm surprised, as something as trivial as this should be configurable via a GUI. Even SDDM for KDE doesn't offer this and KDE is normally super configurable via GUI. ...
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145 views

Is a display manager a client of an X server?

https://en.wikipedia.org/wiki/X_display_manager_(program_type) an X display manager is a graphical login manager which starts a session on an X server from the same or another computer. A login ...
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1 answer
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CentOS 7 SDDM can't click GUI with mouse

I ran a fresh Minimal install of Cent OS 7. When finished, I run this command to get the GUI setup: yum -y install epel-release;yum update -y;yum groupinstall "Xfce" -y;yum -y groupinstall X11;echo "...
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-3 votes
1 answer
842 views

What does `lightdm --session-child 12 19` mean?

What does lightdm --session-child 12 19 mean in the following output? Why does lightdm fork a process to execute the above command? I don't find --session-child in lightdm manpage. Thanks. $ pstree ...
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0 votes
0 answers
680 views

Arch linux greeter without DM

I'm using Arch Linux with i3wm with xinit which results in having tty1 as my "greeter". I wanna know if there is any possibility to have a greeter, for instance, Deepin greeter at login prompt ...
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0 votes
0 answers
834 views

Kali Linux KDE not showing GUI for initial login [duplicate]

this is my first Linux OS, and I'm trying to get more acquainted with my environment. I've got Kali Linux KDE working well, but when I first start linux, it boots into the terminal screen for TTY1 ...
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3 votes
1 answer
3k views

Cannot change default display manager on Mint 19 Beta

On Linux Mint 18.3, when I used to install mdm, the command sudo apt install mdm would open a prompt such as: and I would choose the default display manager. Running sudo dpkg-reconfigure mdm would ...
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4 votes
1 answer
5k views

The difference in Ubuntu 18.04 that requires nomodeset?

My laptop which has an Nvidia GeForce 310M GPU is 9 years old and it has been OK with all Ubuntu releases until now. What is the difference between 18.04 and previous releases that causes the black (...
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1 vote
0 answers
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Display not working for any user except root on tool vnc for Os Suselinux

I was trying to install SAP Hana Data provisioning agent for which SAP Note said that we need a non-root user who should have read/write access to /usr/sap folder and display access. So I started ...
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1 vote
1 answer
906 views

Linux mint 18.3 boot at black screen

After apt upgrade, I have problems with booting into the system. Firstly, I was getting the message that Plymouth was missing and Bluetooth failed to initialize. After installing Plymouth theme I ...
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4 votes
1 answer
13k views

Catch-all command to restart display manager?

Is there a catch-all command to restart display managers (on any given common init system)? I've got systemctl restart display-manager for systemd-based systems currently, but I don't know that that'...
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3 votes
2 answers
9k views

What is the correct procedure to replace MDM with LightDM on Linux Mint?

OS: Linux Mint 18.3 Cinnamon 64-bit. I almost got a heart attack, after reboot preceding this; in an important VM: sudo apt-get install lightdm ... I chose LightDM as the default DM ... sudo apt-...
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1 vote
1 answer
1k views

Keyboard doesn't work at graphical login [closed]

After an update, my laptop keyboard doesn't work anymore when I want to login (while the touchpad does). This is true whatever the display manager used (xdm, lightdm). I can't even switch to console ...
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1 vote
2 answers
10k views

Will this damage my PC? GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pci=noaer pci=nomsi"

When I tried to install my Ubuntu 16.04.2 I faced with no screen problem! and PCI_bus errors! after many searching and trying only this modifications on /etc/default/grub solved my problem: ...
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