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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Setting font DPI system-wide

I have recently installed Debian 11 with the desktop environment LXQt on a laptop with a 14 inch display. By default text and icons are tiny, so to get a reasonable text size I have set the DPI in ~/....
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Audio problems in Linux when using SSH access

I am using Ubuntu 20.04 desktop, I enabled SSH access, then I tried developing a WebRTC application without GUI on that PC remotely through SSH access. Strangely the audio subsystem looks to cause my ...
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gdm3 or lighdm not working (X11 won't start)

I am using Debian 9. After installing Gnome I only see my mouse cursor on my computer screen. I uninstalled Gnome and enabled X11 but it didn't work. I need to connect to the board I use via ssh and ...
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Unable to startx with non-root user (Cannot open /dev/tty0 (Permission denied))

I'm unable to startx without root permissions, as it throws me this error: parse_vt_settings: Cannot open /dev/tty0 (permission denied) When I run startx as root, either with sudo or by login, it ...
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How to tell if an openbox menu is showing or not?

Openbox doesn't come with any option to toggle show/hide a menu, the window manager only has an option to show a menu, and then it can only be closed by clicking outside or pressing Esc. So, I am ...
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Cannot open Ubuntu (18.04) terminal window while on remote desktop (xrdp)

I am unable to open ubuntu (18.04) terminal while on remote desktop (xrdp). I am able to access using ssh where the following error is being generated whenever I am trying to open the terminal through ...
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How to get xinput device ID of touchscreen without using manufacturer string?

Chromium only shows proper touchscreen behavior when the supplied ID argument is 7 in the case of the below devices. Note that the xinput IDs are subject to change during a reboot, so I can't just use ...
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USB Ports Malfunctioning - usb 1-1: device descriptor read/64, error -71

I have a Dell Latitude 7350 2-in-1 (touchscreen tablet hybrid) that is 7+ years old. I originally had installed Pop!_OS on the system, and it worked fine for months, but one day my wireless keyboard ...
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get event when user has selected a text in any window in X11

I want to write an app that shows a popup-menu after a user has selected a text in any window in Linux (debian based). Mac users may know "PopClip" (https://pilotmoon.com/popclip/) and as I ...
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What Linux software component handles display detection and monitor arrangement

I am working on a multiple display system running Ubuntu 20.04 with Nvidia graphics card. Currently all connected displays (not just the added/removed display) turn black momentarily after the ...
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X quits when certain web pages are opened with web browsers

Whenever I visit https://github.com/vinc/level (as one example), X quits, and am taken to login screen. This happens with Firefox and Chromium. I use dwm, and following is "~/.xsession": # ...
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35 views

In X11 is it possible to instruct the client to launch a process in a reduced color palette?

Scenario: I work on my Macbook running X11 Quartz I log into a remote server running CentOS via X11 forwarding over ssh from my Macbook I wish to launch a web browser from the server but due to the ...
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How to set font sizes in minimal X Window setup

I installed openSUSE with generic/minimal desktop environment. It means there is no fancy KDE/Gnome settings program for setting the font sizes by default. On the other system I did the same, but ...
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PrintScreen key not registering in Arch Linux

I'm using Arch Linux with i3 as my wm and running an x server. All my keys work but printscreen key doesn't even register. I tried xbindkeys -k which seems to work for all keys except Print. My ...
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Not recognized screen

Often when I get out of sleep mode, or the screen gets off, or I change screen layout, or I switch VT, or anything that change the screen configuration, on one of my two screen (always the same), the ...
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How do I create a separate XWayland server for each program without a new TTY?

Wayland is a simpler, modern, more secure alternative to the popular X display protocol; however, some programs break under Wayland because they're designed for X. XWayland exists which runs an X ...
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How to set the override-redirect flag on existing window?

I'd like to make a window stay on top of every other window (even if that other window is full-screen, has focus, and belongs to another parent). In my use case these windows are a full-screen ...
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How to copy a string into the X Window clipboard with the command line on Red Hat without using xsel nor any third-party tool?

On a restricted system where installing new tools is not possible, how could one copy a string into the X Window clipboard (the clipboard that works with Ctrl+C / Ctrl+V) with the command line or at ...
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How to setup :0.1 virtual display on-the-fly in X

I want to create a virtual monitor, add it to my current display as a seperate screen (In X sense) and share it over VNC. Now what I want to do is neatly described below in Arch Linux Wiki article on ...
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Cannot enable X11 socket on an unprivileged LXC container

I have created an unprivileged lxc container using the following config: # Template used to create this container: /usr/share/lxc/templates/lxc-download # Parameters passed to the template: --dist ...
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Mouse keeps clicking automatically - 10 clicks per second

I'm having an issue with X11 on Debian: the mouse will sometimes start randomly clicking like 10 times per second for about 2 - 3 minutes. It starts when there's some kind of video content started on ...
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Emacs 27.1 freshly compiled on RHEL8 starts up, but gives "failed to open swrast" error

I just have compiled GNU Emacs on RHEL8 (version message "GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30) of 2021-09-07". When I start it up (as X11 app without any ....
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X fonts are too small / X server dpi

Every X application is way too small incl. xterm, xedit etc. I need to change font size to 17 so it looks like 12 in gnome terminal. My dpi should be 100, but I'm using default value (96). I'd like to ...
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120 views

How can I get xeyes to work? - XQuartz Display Error on Local System

I installed XQuartz on my Mac (Big Sur, v. 11.5.2) using the download available on https://www.xquartz.org/ (XQuartz-2.8.1.dmg), but I have been unable to use it. I've been failing to fix this issue ...
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38 views

Is it possible to get the screen/monitor name where a specific application is displayed on?

I would like to find out what screen/monitor (not desktop) a GUI application is displayed on. For example: my mail client is running on my third desktop, which is displayed on my second monitor ("...
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How to remove PuTTY X11 proxy: unable to connect to forwarded X server error (don't what to use X11 forwarding)

Hi whenever I ssh into my Linux machine via Putty, and edit text files via emacs, I get the following warning/error. ''' PuTTY X11 proxy: unable to connect to forwarded X server: Network error: ...
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How to emulate an X session in a window in the current X session?

How to emulate an X session in a window in the current X session? For example, I'm in the GNOME X session, and I want to emulate the Ubuntu X session, but I don't want to switch to the Ubuntu X ...
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Display glitches of X11 forwarding to Windows

My remote machine is Ubuntu 20.04 and my local machine is Windows 10. I've set up SSH X11 forwarding and my Windows is running vcxsrv. Like the screenshot shows, the majority of functions work expect ...
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Refresh X11 display on an unfocussed virtual console

I am running two X11 desktop sessions (via 2x startx) on two different virtual consoles. I am using a chromecast to continuously cast X11 running on the second virtual console, vt7, as a kind of ...
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Does ~/.Xmodmap replace the presets completely?

I've successfully switched to dedicated settings for my special keyboard in the keyboard settings panel of Xfce. However a few buttons are missing. I was able to get the keycodes for them using ...
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.XResources are not loaded automatically. - Where should I put my xrdb -merge ~/.Xresources initialisation?

I added an .Xresources file to my home directory and when I load it from my shell prompt with xrdb -merge ~/.Xresources the resource settings are recognized (for X programs started afterwards). ...
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Mouse doesn't work on xvfb

I am on ubuntu 18.04 (sadly, because of external considerations - EC2). I run the following lines: sudo /usr/bin/Xvfb :0 -ac -screen 0 1024x768x24 & /usr/local/bin/x11vnc -dp -noxdamage -geometry ...
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Startx - How to Revert Back?

in terminal I type in "xstart". From here both screens go blank and Gnome GUI brings me to a user interface. I see no where to get back to my original shell. No clue how to navigate from ...
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<ALT> - F-key or cursor switches to VT from X

In an X session, pressing alt+left will put me on a VT. Similar to this - only a reboot has no effect on my system. I tried setxkbmap -option srvrkeys:none to get X out of the line but the switch ...
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91 views

Display Constantly "Fuzzy" with Nvidia Driver

I've been having this issue for at least 3 years where my display will be blurry while using the proprietary Nvidia driver. Nouveau doesn't fix anything either. Any screenshots that I take using the ...
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Starting ffplay X-window without a window manager

I want what is essentially a kiosk, to display a video stream using ffplay, without a whole Desktop environment. I started with minimal CentOS7, and installed xterm and X11, per this simple guide: ...
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Capture picture after unlocking screen / logging in i3

Running Manjaro with i3wm, and my .i3/config has the following related to locking the screen: # Lock screen exec --no-startup-id xss-lock -- ~/.i3/lock.sh bindsym $mod+Ctrl+l exec --no-startup-id ...
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70 views

Programmatically Trigger Drag&Drop Events on Linux

I currently working on an interactive video stream application (implemented in PyQt5) which allows viewers of the stream to interact with the streamer's system, for example by moving the mouse cursor ...
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How do I swap blue and yellow in X11/Mate?

I use postmarketOS with Mate DE, I noticed my wallpaper was blue where it was supposed to be yellow so how could I fix this?
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Get an accellerated X11 driver for "XGI Z7" GPU under Alpine Linux v3.14?

I am trying to get a modern Linux up and running on an elderly PC with a Vortex86DX CPU (i586) and a built-in GPU which is reported in dmesg as [ 21.246156] Console: switching to colour frame buffer ...
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Cursor flickering between two displays

I am running the latest version of Linux Mint XFCE on a ThinkPad Carbon X1. I have two external displays connected to the ThinkPad through a Lenovo USB-C Docking Station. The horizontal ordering is ...
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165 views

How do I make xterm (not X11) mouse pointer bigger?

I got a new laptop with a much higher screen resolution than I've ever had, 2560x1440 pixels. I'm using i3 window manager, and Arch linux current xterm (version 386-1, but that might be just the ...
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42 views

Screen flickers when playing sound

I made the switch from OpenSuse TW to Arch, instead of installing arch from scratch I decided this time to try Arco Linux. Now, the flickering problem isn't new to me, it happened on Fedora 33 and 34 ...
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Changed keyboard map reverts back after short time

I use: xkbcomp "$DISPLAY" - | # Menu key = mouse button ...
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Why does xorg.conf produce an incorrect monitor order?

My monitor setup is as follows: But everytime I login to any Qtile or KDE the default layout is set to this: Even when I explicitly tell the xorg.conf to put HDMI-0 on the left. Does anyone know why ...
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Partial freeze when playing 3D games on Linux

When running 3D games (video players or 2D games work fine), at a random moment the image freezes. If I Alt-Tab out of the game window, as shown in the linked video below, the Alt-Tab dialog works and ...
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99 views

How to generate correctly a new .Xauthority file for a display missing it, without restarting X?

I have removed for a mistake my $HOME/.Xauthority file. I want to recreate it without restarting X11. ATM I have start a new X11 session with this command startx -- :1 but my :0 display still don't ...
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35 views

Unvisible application content within VNC / XFCE

I do have a weird render issue of some applications that I'm running within a tigervnc session on a remote host where XFCE is started. As you can see from the screenshot, while applications display ...
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32 views

How to specify the BusIDs for all framebuffer devices in freebsd?

I installed lxde this way: sudo pkg install xf86-video-intel sudo pkg install lxde-mate cd /usr/home/freebsd vi .xinitrc ck-launch-session dbus-launch --exit-with-session exec startlxde It doesn't ...
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174 views

Which Linux distros have good multi-monitor support for differing DPI, scaling and resolutions?

Which Linux distros have good multi-monitor support for differing DPI, scaling and resolutions? I have 4 27" monitors with 3 resolutions between them: 1080p, 1440p and 4k. Windows handles per ...

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