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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Ubuntu 16.04 need to start Compiz desktop first then X11 forward be enabled?

My Ubuntu 16.04 won't forward X11 until I physically login(Compiz started). Is there a solution for this? Error before Compiz start: Invalid MIT-MAGIC-COOKIE-1 keyError: Can't open display: :0 ...
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How to install xev if it is not present

I'm teaching myself about xmodmap and some of the tutorials say that you can get the keycode of a key by using xev. When I try to run the command, I get -bash: xev: command not found Running apt-...
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Xorg conf for multiterminal setup (zaphod)

I have a machine with a Silicon Motion SM750 graphic card and the conventional onboard graphics from motherboard. The SM750 has two VGA outputs. I need to configure this machine on zaphod mode: use ...
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Turn on/off Debian screen / HDMI

I want to turn off / on the screen remotely via SSH / using cron. I'm using Debian 9. I've found some commands, but they're not working at all. I got commands from this answer. These commands are ...
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Libinput/xbindkey sensitivity for side-swipe

I am ultimately trying to setup my touchpad so that I can swipe left/right (two-fingers) to change desktop, (like the three-finger side-swipe in macOS). A few three-finger gesture approaches like ...
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Linux Mint - Cinnamon - How to trigger a visual feedback from terminal [duplicate]

During my work i run some bash scripts on linux terminal that takes 5 to 6 minutes to complete. I would like to append some command on that scripts, so that when it finish, it shows some visual ...
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/dev/console behavior that makes no sense to me

[Context: After I read Linux: Difference between /dev/console , /dev/tty and /dev/tty0, I invented a few tests to check my understanding. As a result, I learned that my understanding of /dev/console ...
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Copy large texts to clipboard in X11

If I try to copy a large file (around 30K) to clipboard with xsel (or xclip), the copy operation fails and the content of clipboard remains unchanged. If it's a hard limit in X11, is there any way to ...
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X11 error: BadValue (integer parameter out of range for operation)

What underlying problem does this imply? Which integer parameter is out-of-range? Which part of the source code? And most importantly, how can I fix the problem? [vo/opengl/x11] X11 error: BadValue (...
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Startx as non-root user via SSH

I have a remote VM running Ubuntu 1804 and would like to run VNC. I am using x11vnc, which requires an X server to be running. Currently, I'm connected through SSH. The VM has an Nvidia card, and ...
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Caps lock is behaving like shift lock

I'm not sure how this happened. Maybe it was when I was adding a second layout to my keyboard somehow (although I only added another language). When I press caps, which I only use and have only used ...
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Send mouseclicks at coordinates

I am currently utilizing a script to send mouse input to certain buttons like this: xdotool mousemove <x> <y> xdotool click --window <window_id> This works fine, but it is annoying ...
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Replicate Gnome UI display scaling in i3

I'm using i3 with some xrandr functions to set up my displays. I'm on a Dell laptop with 4K OLED screen. When I log into Gnome, by default its displaying scaling is set to 200% and everything is ...
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Windows 10's 3-finger emulation of middle button: Click, hold, drag, release?

I asked X-windows users how they obtain full 3-button functionality on Windows 10 laptops, which generally lack a middle button. I assumed that Windows 10's multi-finger tap emulation of different ...
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X-window requirement for 3 mouse buttons on a modern Windows laptop

I'm a big fan of using bash, gvim, xpdf, xterm, x-windows, and many of the unix-like utilities that Cygwin has. I have a question that I suspect goes beyond Cygwin and applies to anyone using a Unix-...
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No xauth program; cannot forward X11

I got the following error message when I use ssh -v -Y. The server OS is mojave. Does anybody know what is wrong? debug1: No xauth program. Warning: No xauth data; using fake authentication data for ...
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Setting display scaling and resolution with xrandr

I just completed a fresh install of arch and I'm configuring the i3-gaps window manager. Using a 2560x1440 monitor, all the graphics (text, symbols, etc..) are really small and I'd like to adjust ...
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Nvidia Optimus screen tearing despite PRIME Synchronization

I have persistent screen tearing on Nvidia Optimus laptop running Mint (but every other distro I've tried as well) and commonly recommended solutions don't work for me. I have an external monitor that ...
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Debugging a mate terminal session which won't start

I'm configuring the Windows Subsystem for Linux on my company-issued laptop (windows 10). Things were going nicely until I tried to get MATE Terminal working. On my devbox in the office, I run ...
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VNC connection to Xorg window

I have a computer with an attached display starting a Java application via startx. Now I want to access the application remotely via VNC. Is it possible to open a x11vnc session for one Xorg window? (...
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Two X servers are running

I am running to a weird issue. After installation of Suse Enterprise Linux Desktop (this is a custom installation using script), I found that we are running to X servers one on tty7 (default) and one ...
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Why two unicode-characters are not allowed in xkb?

I wonder why a sequence of Unicode-characters is not allowed on one key-press in xkb. Eg. I use the Indian keyboard for typing in Devanagari. This keyboard is based on the inscript keyboard layout. In ...
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Is it possible to simultaneously enumerate X Server display connections and identify the monitor attached to each?

I would like to enumerate the X Server display connection points, e.g. DisplayPort-1-7 or HDMI-A-1-1, while simultaneously identifying the physical monitor (if any) attached to each. Motivation: I'm ...
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Release modifier keys after using xdotool

I use the following command in a bash script file: xdotool type --clearmodifiers $(xclip -o -sel c) I invoke it with a shortcut such as CTRL+SHIFT+e The action works as expected. However, after it ...
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How to start Lumina by default? [OpenBSD]

Question: How do I configure OpenBSD to start Lumina by default instead of OpenBSD's default desktop environment?
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Build an embedded setup with custom QT/X11 application as desktop background

I am writing a custom application in QT5 (for X11), which will be used in an embedded setup. When the system boots, I want the system to boot into my application, with the main window of my ...
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261 views

Debian 10 cannot open display:

I have a Debian 10 system with a desktop environment installed and running. When I open a terminal and try to run any GUI application , such as gedit, from the command line, it fails to open with the ...
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29 views

Keybindings: Mapping them from keyboard to application?

I would like to understand the mapping of keys from Mac OSX to end applications. What are the mappings, configuration and diagnostic tools at each point for these inferences? Does the provided step ...
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How to start programing simple screenlet/desklet with minimal dependencies?

I would like to make something like Screenlets-Folderview but stand-alone and with minimal dependencies (because installation of screenlets on recent Ubuntu 18.04 is a hell, and I don't want install ...
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SSH X forwarding too slow

I have the following setup: internet host_1 --> router_1 <----------> router_2 <-- host_2 Both host_1 and host_2 run Ubuntu 18.04. From host_2, I ...
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How do I inform Firefox about a change in the X server resource database?

When docking/undocking my laptop, I change Xft.dpi in the X server resource database using xrdb. After that happened, I would like to inform as many applications as possible that they should re-read ...
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Linux Mint 19.2 Tina GUI won't startx automatically

I am running a standard Linux Mint 19.2 system. By all accounts every single default was chosen. The main problem is that X Windows does not want to start automatically. I have a vague suspicion this ...
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1answer
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Finding APL symbols on the keyboard

I use GNU APL on Debian 10. My Apple keyboard is configured to input APL characters using the right Alt key and the latter is remapped to the right Command key: setxkbmap se,apl -variant ,dyalog -...
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Standalone X program to list open/minimized windows

I'm currently using a floating window manager (w9wm) which does not provide a "taskbar"; windows are either on-screen or, if minimized, listed in a menu available by right-clicking the desktop. If a ...
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Saved file changes in editor lost when disconnected using X forwarding over SSH

I have a very strange problem on a debian stable server: There is a file opened in a text editor on the remote machine using X11 forwarding over SSH. The file changes were supposedly saved to disk ...
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1answer
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Keyboard events not reaching X server

I'm on Raspbian 10 (buster) with no GUI. Then I installed X server and did a startx but then pressing keys on the keyboard has no effect on the screen, as depicted in this image. When I plug the ...
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Is “xinput set-button-map” the only way to remap mouse buttons?

I know remapping mouse buttons can be done with xinput set-button-map. However, can it also be done with hwdb files and scancodes?
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How to scale two displays differently and rotate one of them?

I have two screens: 4K, HDMI-0 1680x1050, DVI-1 HDMI-0 is left of DVI-1. DVI-1 is rotated physically 90 degrees clockwise ( --rotate left will make it rotate correctly to fit the physical rotation)....
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1answer
33 views

“Can't open display” when trying to start X program on a remote machine

I have 2 virtual machines, one running CentOS 7 and the other one CentOS 6.5. I'd like to run an application on the CentOS 6.5 VM but display it on the 7 one. I cannot use ssh -X (or -Y), I have to ...
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Script to detect mouse clicks like a screen saver while ignoring mouse movement

Would like to disconnect an nic after a minute of user inactivity, where inactivity is defined as no mouse clicks or wheel scrolls. Mouse movement is to be ignored so xscreensaver is not suitable and ...
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1answer
115 views

X11 won't come up on Centos 7.7 systems

I have 2 production machines with Centos 7.7. They've been off for the summer, and when turned back on X11 won't come up. They use the NVidia manual install driver, so I reinstalled it, but no go. I'...
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1answer
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Debian 10 - Commands stop working in console after laptop being on for a while

A couple times after waking my laptop up from sleep after I use it for around a minute all commands stop working and my firefox tabs give errors. When I type any commands in console they all give a ...
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Full desktop experience to another computer [duplicate]

I have two computers: one is a very robust desktop with Ryzen 3600, 16GB of RAM, SSD storage and a RX 5700; the other is a weak laptop with a i5-4200u, 4GB of RAM and HDD storage. Most of the time I'm ...
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Xfbdev not found after including X (tinyx/kdrive) in Buildroot

I'm trying to add Xorg to an evaluation board for which I've already been provided with a working linux kernel. The evaluation board has an LCD display and I can confirm hardware & drivers are ...
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1answer
82 views

Switch between X applications without a window manager

I currently have a Java application that interacts with a web application. The Java application is launched first and becomes a full screen application; then chromium-browser is launched on top of it ...
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164 views

OpenBSD - How to start x by default?

Question: How to startx by default in OpenBSD? Backstory: I recently reinstalled OpenBSD and it doesn't load the Desktop Environment environment and is text-only upon startup. Personally, I like ...
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Xorg starts on display :1 at reboot

When rebooting a RedHat Linux, screen sometimes gets blank (=black). This is because Xorg launched itself on a display :1 instead of the expected :0 display. It is possible to connect via ssh, or open ...
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Can't get font to load in URxvt from .Xresources

I've been trying to change my font in URxvt to Overpass Mono, but I've been having some problems. I moved the font files to /usr/share/fonts/ and ran fc-cache -f to scan for the fonts. The fonts are ...
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Linux Mint 19.2 cinnamon desktop becomes very sluggish if left logged in for 24hrs

Running Linux mint 19.2 with all the latest updates and the video drivers from NVIDIA installed. Upon logging in, the desktop is very snappy, even with multiple windows open. Switching windows is ...
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fcitx inverts scroll direction

I am trying to set up Japanese input on Arch Linux / XMonad using fcitx-mozc. After following the fcitx setup instructions given on the arch wiki, I noticed that after starting fcitx, my scroll ...