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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What is X11 exactly?

I'm reading Wikipedia about X11 and it says that: In its standard distribution it is a complete, albeit simple, display and interface solution which delivers a standard toolkit and protocol stack ...
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X11 touch the value of the shivers . Is there any way?

I am using the X- widnwos. I use the touch screen. If you are a touch on the touch-screen cursor is unstable. Below is the video. https://youtu.be/jMub9-T_wEA How do I improve the following ...
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Securing X window displays

I want to install X on a system I'm in charge of. I plan on running it with local connections only, e.g. with startx -- -nolisten tcp (which I understand is the default these days). Some relatively ...
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Ubuntu .desktop file not working but command line launch works

Ubuntu 15.10 running in a VM. I have an application installed in /devel that I am able to run from the command line with the command: /devel/dbvis. This launches the GUI and works fine. I created a ...
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ddd fails to connect to X Window: Is it a bug or a local misconfiguration?

I am currently analyzing a problem where ddd hangs because it cannot connect to X Window. Here is the output of strace: connect(4, {sa_family=AF_LOCAL, sun_path=@"/tmp/.X11-unix/X0"}, 20) = 0 ...
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save state and detach from an xming session and attach to the same session later

Welcome to the Xming X Server Vendor: Colin Harrison Release: 6.9.0.31 FreeType2: 2.3.4 and Linux 3.8.13-118.4.2.el6uek.x86_64 #2 SMP Tue Mar 22 20:47:10 PDT 2016 x86_64 x86_64 x86_64 ...
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Running X11 apps on a screen with limited bit depth

This is a bit of an esoteric query, but I want to export the X11 display from my Raspberry Pi to an old Mac capable of only 256 colours. That's fine as far as it goes - but the colours are so mangled ...
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The window would like the X- represents at the same time in two frame buffers

I'm using the two frame buffer. /dev/fb0: 1024x768 (LCD) /dev/fb1: 1920x1080 (HDMI) I want to be the same content simultaneously on two frame buffer output. Is there any way ?
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I want to increase the size of the close button on the openbox

I am using in the OPENBOX X- window. Was subjected to increasing the size of the title bar, it is the relatively small size of the close button. Can I file through rc.xml adjust the size of the ...
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chroot into a Linux with X window system installed, from a Linux without X window system, and then run xinit, there is no mouse and keyboard working

I have two systems on my machine. One is Ubuntu and the other one is Linux from scratch (LFS) which I built it my self. Ubuntu has X window system installed but LFS has no windowing system ...
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how can i start xfreerdp on localhost?

I've installed Kali sana on my android tablet -lenovo a5500-hv- using Linux deploy and I use either vnc or xrdp to connect it to my android and have ability to use GUI But they don't support audio and ...
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Why is my system freezing when I try to unbind GPU from radeon?

Right now I'm trying to accomplish this: http://arseniyshestakov.com/2016/03/31/how-to-pass-gpu-to-vm-and-back-without-x-restart/ I've gotten everything on the host to work. DRI_PRIME is working ...
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Where does Linux vncserver (Xvnc) get the list of geometry possiblities

I have looked through through parts of the code, and the places obvious to me, but I have not found the place that I can add legal geometries for a vncserver that I can set using xrandr. I have tried ...
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startx fails fedora 23

Under Fedora 23, I cannot start the X server by normal means. How can I fix this? I am aware that there's no shortage of similar problems reported over the years, but so far none of those fixes have ...
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X11 forwarding fails when switching users

X11 forwarding works when I am logged in my CentOS 6.6 cluster as myself (using ssh -AY user@ipaddress). When I try switching users, e.g. sudo su user2 and try to fire up xterm, I get the error : ...
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Opencl only detects 1 gpu instead of 2

I have an ubuntu 14.04 setup with r9 390 and the r9 nano. aticonfig --list-adapters detects both the r9 390 and r9 nano. The nano is connected to the motherboard via a 1x to 16x pci-e USB riser. When ...
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new debian installation doesn't like showing native resolution of display

EDIT: not sure if I can delete this? Everything corrected itself once I turned the other pc off. Seems interference was happening across certain wires. (Still wouldn't mind knowing what the ...
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1answer
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How do I make “startx iceweasel” launch full-screen?

I've done a clean install of Raspian Lite on my Rasperry Pi (there is no desktop environment installed). I'd like a kiosk-mode browser running fullscreen without having to worry about ...
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Unresponsive Java Application with ssh X forwarding

I have an X session forward via ssh. I run a Java jar application (Apache JMeter) on the remote server. It functioned really well with acceptable lag until today. Recently has become really ...
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How to add xeyes to the taskbar

Hoping my question is not regarded as silly, I would like to know how, if possible, I can attach the xeyes utility to the task bar. I do not simply want an icon on the task bar for launching xeyes, ...
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Arch Linux: Cannot start X

I installed Catalyst drivers from the AUR using makepkg -sri, and the installation went through successfully. However, now I can't start X at all. On boot, X tries to start but instead gives me a ...
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xrandr does not set a new resolution (switch back automatically)

I have a Dell Inspiron 15R with a dual-boot Ubuntu 15.10/Windows 7, but the HDMI port broke (it does not appear with xrandr on Linux nor on Windows). So I used a VGA cable but the resolution seems to ...
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SSH'ed into remote machine, but run certain graphical apps locally

I have a terminal window and am ssh'ed into a server, possibly running tmux. Both the remote server and my local computer have the same view of the filesystem I am working on. I would like to be able ...
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i3 xterm menu (ctrl+mouse) too small

I've recently started to use the i3 window manager. I configured i3 and xterm to fit my needs, but whenever I start xterm and want use the menu (ctrl+mouse_button), the menu gets displayed as a small ...
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Why are some apt-get-installed fonts being ignored by fc-list, xfontsel, etc?

Even after I run dpkg-reconfigure fontconfig (and getting the message Regenerating fonts cache... done.), font-related programs such as fc-list, xfontsel, gnome-font-viewer, etc. omit some fonts ...
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109 views

Strange warnings when cursor moves from one monitor to the other

I am not sure whether this is a real problem. However, every time I move my cursor from one screen to the other on a dual monitor system (i.e., laptop + external monitor) the following warning is ...
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103 views

Short blank screen a few seconds after login

I am using Ubuntu 15.10 with unity on a Lenovo Thinkpad T460s laptop. A few seconds after I login my laptop screen as well as the external monitor go blank (i.e., black) for a very short time. I ...
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x11 Keeps Freezing Virtual Console

I have a problem on my Arch-Linux system. I use startx to start my GUI, and this issue occurs randomly throughout my day. There is no sign of anything going wrong (until I switch to a Virtual ...
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trigger a Control_Latch in X

hi I'm looking for a way to bind a control_latch event using some key or key combination. By control_latch I mean the ability to have a behaviour similar to a sticky control. So far I tried a bit ...
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How to create an X window which won't close by any way other than a terminal command

I'm trying to create a process that will start with X11, will be graphical and unkillable by my own user. More specifically, I have an urxvt drop-down terminal starting at startup and running a tmux ...
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Mapping CapsLock to Escape for Colemak layout

I use vim and I mapped CapsLock to Escape. Recently I decided to switch from qwerty keyboard to Colemak keyboard layout. Colemak maps CapsLock to Backspace. How can I map CapsLock to Escape back? In ...
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How can I make screen fade to black from terminal rather than just shut off?

I set up a hot corner that uses xset dpms force off to turn my display off. However, I want the fade-out effect to black that OSX has. How can I achieve this with a terminal command?
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What happened with X12? [closed]

Wikipedia says that "The protocol has been version 11 (hence "X11") since September 1987". That's almost 30 years. Why did the X protocol freeze?
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Maximising resources for a Raspberry Pi 2 while streaming Steam

I've set up my Raspberry Pi 2 to stream Steam games from my computer, however I would like to have a script that basically closes the X server completely before streaming so it's not using the few ...
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dual monitor support on a non-GNOME system

I have Ubuntu-14.04 with x11 drivers and lightweight WM installed on my laptop Toshiba Satellite Z930. I also have an external monitor connected to the laptop via HDMI interface. Currently, the ...
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1answer
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Distinguishing between running a process in client terminal or on the server when using SSH [duplicate]

I'm new to Linux. I was trying to play a video on my laptop using SSH command from my android phone(JuiceSSH). but the video started playing in bytes in my phone's terminal. the player was VLC player. ...
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Adding a second GPU greatly reduces my graphics performance

I'm currently running Ubuntu 15 desktop with an ATI R9 390 and a 4k monitor via display port. Everything runs smoothly. I have a second monitor which is VGA-only, and since the R9 has no VGA ports, ...
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Cygwin/X DISPLAY number no longer :0?

I use Cygwin/X to ssh into a linux computer cluster using a Windows (10) pc. Yesterday I was in the middle of an ssh session using X11 forwarding. Suddenly one of the X windows open started to hang ...
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GDM not launching GNOME

So, I installed everything including Bumblebee, nvidia, intel drivers, and GNOME on my laptop. It worked fine at first. I noticed it said XServer could not be found while running nvidia-settings, so I ...
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1answer
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How to get Debian Jessie to use the nvidia proprietary driver?

I followed the instructions in the Debian wiki to install the nvidia proprietary graphics driver on Debian Jessie via backports. Unfortunately, despite my best efforts, the X server will not use the ...
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2answers
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How do I scale i3 window manager for my HiDPI display?

I have a Dell XPS 13 9343 2015 with a resolution of 3200x1800 pixels. I am trying to use i3 windows manager on it but everything is tiny and hardly readable. I managed to scale every applications ...
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Command to simulate keyboard input

Is there a command that exists that can simulate keypresses? I want to pipe some data to it to make it type into a GUI program for me.
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Querying X from a daemon [closed]

I'd like to be able to query the local X server and get the idle time of the machine. This would be run from a daemon that wants to act as soon as the user has been idle for long enough. Right now we ...
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2answers
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Can I force screen blank and ignore input?

I want to force my screen to blank and to stay blank regardless of what I do with my keyboard and mouse until it receives a command to unblank (kind of like a lock). The commands I know are: xset ...
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Is the current screen resolution saved to a file anywhere?

I'm trying to do a low level set of functions to get and set the display resolution, and I was wondering if there was a file that contains only the used resolution and that could be used to change it. ...
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Freeze slide on external display (projecter), when using OpenOffice, and use laptop to do other (secret) thing

I am running kde on debian jessie (X11+Gnu+Linux). When doing a presentation, using LibreOffice (OpenOffice) presenter, the audience sees the external display, and I see the presentation console on ...
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Program run from udev cannot open a window [duplicate]

I have a script, written in python: #!/usr/bin/python3 from tkinter import messagebox variable = messagebox.showinfo('title', 'question') This python script does nothing else than showing a message ...
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2answers
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What does it mean to set a terminal's “icon title”?

I generally see the syntax for setting the terminal title as (something like): echo -e '\e]0;Some Title\a' But I noticed this answer used 2 instead of 0, which prompted me to do a little more ...
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1answer
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X11 authentication is not working in `sudo sux / sudo su`, but works in `sux / su.` Why?

I have a vnc session and I can access X11 just by doing su - user, for other user, without the need of sux. Also, when I am trying to switch to user, using sudo sux - user or sudo su - user, I can't ...
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What's the difference between X11 forwarding with `ssh -X hostname and xhost +hostname; ssh hostname`?

In both the cases, I am able to connect to X11. What's the difference? And is xhost +hostname permanent, even after the base terminal is closed?