Questions tagged [x11]

The X window system (commonly X Window System or X11, based on its current major version being 11) is a computer software system and network protocol that provides a basis for graphical user interfaces (GUI) for networked computers.

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How to configure the virtual keyboard in the X server?

I am using an embedded Linux for a Toradex system on module. The Linux runs an X server/X11 with xfwm4 window manager. Also, I use a Python desktop app created with the GTK framework. How can I ...
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How to disable screen going blank/off in X11? [duplicate]

Is there a simple way of disabling this? I don't have any power saving constraints currently, as my desktop is always plugged in and I don't mind having it running forever. All of the explanations on ...
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Start a GUI application with a specific x11 instance name

I have used the following post to create a workspace for my i3 that can be filled with windows. Populate an entire pre-configured workspace in i3wm Now I would like to fill it with specific programs ...
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Recording screen with pulseaudio causes desyncs

Following the ffmpeg's Capturing Desktop guide for linux, when audio source is pulse format it causes frame freezes and desyncs, fps slows down, and video is delayed compared to audio. I have tried ...
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How to disable focus stealing in GNOME 3.30.2 on Debian 10?

Basically the header - I can no longer tolerate windows popping up under my mouse pointer while I wait for the applications to load. I tried the solutions for Ubuntu with Compiz, but it had zero ...
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What causes green RGB pixel errors in X11 with an AMD Radeon card and the amdgpu driver?

I would like to find and eliminate the reason for soft pixel errors on my screen. I am looking for tools or a strategy how to find quickly the origin of this problem. The pixel errors are pure RGB ...
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How to run an X11 application in weston via xwayland

I was told that most X11 applications should as well run on wayland, when using xwayland. I am not sure if I fail to call weston in a proper way, or if the application does something special, which is ...
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Trick Linux Mint Cinnamon in headless mode to think a monitor is connected?

Here is what I have so far: Headless server running Linux Mint with Cinnamon as the desktop x11vnc installed No monitor is connected to the server The problem I'm running into is that x11vnc is ...
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Screensharing with Firefox and Discord makes the mouse unresponsive on the shared monitor

The problem When I screenshare an entire screen using Discord or Firefox, the shared screen becomes completely unresponsive to my mouse. Stopping the screenshare doesn't fix the problem. Window-...
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WSL2 GUI Apps without X Server

This post indicated back in September that WSL2 would soon support GUI apps without needing a third-party xserver. However, I've not been able to find any more up-to-date references to this or whether ...
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Set default font in XQuartz xterm?

With XQuartz 2.8.0_rc1 running on MacOS 10.15.7, when I run an xterm and ctrl-middle-click on an xterm I get a popup font menu as shown here. How can I set the default font so that all xterms open ...
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“Listen” for change in full-screen status of a screen?

Under X-11 there are various ways to detect if a screen is currently in full-screen mode. Is there any way to "listen" for a change in full-screen status, other than checking every second ...
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Issue while running GUI through LibGL with swrast error

I am receiving an issue with LibGL while running GUI through X11 forwarding. Previous errors which are available online are mostly because of Nvidia drivers, though none of those fixes worked. I tried ...
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Xsession keeps crashing [closed]

I can't login. I'm getting the error as shown. As soon as I click "okay", I'm taken back to login manager. What could be wrong? I'm able to launch xsession from tty, using startx command.
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Screen Mirroring with xrandr super zoomed in

I am trying to set a second monitor to mirror the main display of my laptop (which is a hiDPI screen, 3840x2160), however, whenever I configure the second display with xrandr, using a simple command ...
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How do I successfully run a second X session?

I'm trying to run startx -- :1 vt1 on a tty with a standard user (named stduser), which is already natively logged on Debian 10 with XFCE as per this answer: https://unix.stackexchange.com/a/85384 The ...
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How to set X11 Window Class on application startup

I have an application that doesn't set its own x11 window class, is there an easy way to do this from the command line? I've searched around for an x11 command to do it and haven't been able to find ...
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Running SDL code in SSH

I have a C program using SDL on my linux PC, when I try to launch this program from my windows pc with ssh it give me an error : no protocol specified and no available device. I have try to start SSH ...
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How long time period does the .xsession-errors log file cover?

I have a hard time understanding how long time period my .xsession-errors file covers. There's also a .xsession-errors.old and taking a quick look it seems there's one file for each time X was started?...
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Remap keys only for a particular application/program/process

Sometimes it is convenient to have Escape where Tab usually is and arrows where h,j,k,l usually are. Sometimes applications are not very configurable in terms of keybindings. There is xmodmap which ...
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TBrowser won't open (ROOT)

I have installed the ROOT program on ubuntu shell, but I have some problems when I try to run the TBrowser. Somehow the TBrowser don’t show up when I type “new TBrowser()” , but instead I get the ...
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Raspberry OS lite, TFT display, Openbox : Cannot init x

I just installed Raspberry OS lite (no desktop environment), plugged a WaveShare 2.8 TFT display in and installed Openbox and the tools below: xorg openbox obmenu openbox-menu menu slim (slim for auto ...
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Linux Header error while installing nvidia-drivers in Kali Linux

I ran the following command after disabling nouveau: apt-get install nvidia-driver nvidia-xconfig I got the following error in the very end: dkms: running auto installation service for kernel 5.10.0-...
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One monitor, 2 boxes - want to do remote login and X from one to the other, how?

So I have a laptop, an older box, and one monitor. The former has some work stuff which is sensitive, I want to use the other one for anything web browsing etc. Both run linux (manjaro the first, pop-...
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How to increase maxclients on Xvnc

I'm running a headless VNC server (TigerVNC with Xfce). I need to increase the maximum allowed number of X clients because I'm hitting the 256 limit (yes I've got that many) and I get the "...
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xrandr panning when two monitors have same resolution with different dimensions

I have a 15" 1920x1080p laptop aligned on its bottom screen line with the bottom screen line of an external 21" 1920x1080 monitor, oriented in portrait mode, as in that unsolved thread https:...
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Some applications open unexpectedly at full height

For a couple of days some applications have been opening at full height after being closed when their height is more than half the desktop height: VSCodium 1.52.1 LibreOffice 6.1.5 Rhytmbox 3.4.3 VLC ...
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XDM stuck on login prompt

I've recently attempted experimentation with Arch Linux, and have managed to get an install with basic utilities, a network manager, etc going. I plan to use the Openbox window manager, with (at least,...
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How to show pointer after it has been hidden by unclutter

I am automatically hiding the cursor with unclutter -idle 3 in my bspwmrc. But I want the cursor to show again ever time I focus a different window with the keyboard. (This would provide a little more ...
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Function key of HP laptop changing behaviour after waking up from sleep mode in Arch Linux

I'm in the process of setting up an Arch Linux system on an HP laptop, but because of the funky way the keyboard is laid oud (the key labeled as the less/greater key sends scancode 105, which is ...
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X Logical Font Description and HiDPI

The problem: X-server serves fonts at a fixed resolution of 100dpi, rather than the current window system resolution (xdpyinfo | grep -F resolution). A bit of theory. There are legacy server-side ...
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xev does not respond to numeric keypad keys

xev gives no response for my "/", "*", and "-" keys!! but outputs those responses below for "0", "+", and "." on my numpad keys, ButtonPress ...
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Why is DISPLAY=:0 incorrect when I only have 1 screen

I've never connected my laptop to an external monitor so I am always using the laptop's primary display. Occasionally, when waking from sleep, I realize that some of the GUI apps (e.g. gitk, git gui) ...
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Using python to probe ioctl console

I have a situation where my tty is stack in blank screen when trying to switch VT (Using X11 in Ubnutu 20.10) I found out that I am frozen while I am probing with the VT_WAITACTIVE. Basically ...
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1answer
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Environment variables in window manager not propagating to X clients

Whenever I start my BSPWM session, and regardless of how I start it (I have tested LightDM and Startx), I find that environment variables are somehow not being propagated as expected to X clients ...
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Switch between dummy xserver and a real monitor

I would like to set up my Ubuntu 18 to use a real monitor if is available or use a dummy xserver if the monitor is not available. It is possible to setup xorg.conf to autodetect monitor and if no ...
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On screen display (OSD) linux utilty that works with X11 and accepts vector (.ttf, .otf) etc. fonts?

Is anybody aware of such a CLI tool that could be invoked from a script in order to display text on the root window of an X11 display? I know of an xosd-bind package available from most linux distros ...
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Can XDMCP be encrypted with RSA or AES? Can XDMCP be forwarded over SSL or TLS?

I know XDMCP cannot be forwarded over SSH because XDMCP uses UDP and SSH uses TCP. Can XDMCP be forwarded over SSL or TLS instead? XDMCP is not encrypted by default. Can AES or RSA be added to XDMCP ...
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Why is the behavior of the Compose key different under pure console and X?

I'm setting up the keyboard layouts in Xubuntu 20.04. I generally want to be able to input various Unicode characters, both in pure console and in X, using the same keystrokes. I know that console has ...
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Keyboard conf at `/etc/profile` does not work

This is a script that I can source or run to setup my keyboard layout: #!/bin/bash # Testing to only apply the layout to Kinesis keyboard. # Get Device ID with: `xinput -list | grep -i key debug_out=/...
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xrandr not respecting '--primary' or '--left{right}-of'

I have the following in my .xinitrc: xrandr --output eDP-1 --off xrandr --output HDMI-1 --off # set monitors if [ xrandr -q | grep 'HDMI-1 connected' | wc -l == 1 ] ; then xrandr --output HDMI-1 -...
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multi-monitor layout/detection not persistent (docking, displaylink, kde)

Context : I have a dock labelled DisplayLink, 4HDMIorDP (actually DVI under the hood) to USB-C PD charging. So I use it with 4 external monitors and the internal monitor. I'm running Kubuntu20.04, on ...
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pam_xauth isn't working with sudo: Unsupported authorisation protocol

I'm trying to set up xauth cookie forwarding between users, so that GUI programs could be run as any user via SSH. I have added the following line to /etc/pam.d/su and /etc/pam.d/sudo: session ...
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1answer
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Can't connect to xrdp as normal user, connecting as root is fine

I am trying to connect to Debian 10 machine with KDE from Windows 10 using RDP. I am able to connect as root, but not as a less privileged user. The connection drops after I type the correct ...
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Upon restarting Plasma from a tty it shows could't sync environment with dbus

I start X11 from a tty via startx, where .xinitrc is !#/bin/bash /usr/bin/startkde After leaving the session, if want I to re-invoke the session then I set the ownership of /dev/tty... to $USER if ...
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gitk crashes when viewing commit containing emoji: X Error of failed request: BadLength (poly request too large or internal Xlib length error)

I'm able to open gitk but it crashes as soon as I open a commit whom changes contains an emoji (not the commit message). Error ❯ gitk --all X Error of failed request: BadLength (poly request too ...
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What is the current best way to connect to remote X server?

I have a computer that is running Debian, and has Xorg started. What is the best way to interact with it? Previously I was using x11vnc tool, but it seems to be old, and rather slow. Are there better ...
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sudo to another user, but unable to start X applications

This is on Ubuntu 20.04.1, in case it makes any difference. I open a terminal, sudo to another user, then try to run chromium and get the output pasted below. Every search I've done turns up ...
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Application not using full display area running X11 without window manager

I am trying to run a piece of software on an arm SoC. I have x11 running and I launch manually with xterm -geometry 800x480-0+0 while this opens up a xterm that uses the entire panel when I run the ...
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Fuse “primary” and “clipboard” clipboards

Unfortunately I'm finding it difficult to configure PRIMARY and CLIPBOARD like I want to. If there weren't two different clipboards, then it'd work exactly as I want. How this would work is: If ...

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