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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Unable to start gedit from terminal

I use remote desktop connection & XRDP to remote to my Ubuntu 14.04 VM which is running Xfce. I can start any program from the Application Menu (diffuse, meld, gedit) but when I try to run those ...
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20 views

Inverting FN keys

My notebook is equipped with one of those fancy multimedia keyboards where you have to hold the FN key in order to use the classic function keys (F1-F12). Is it possible to invert this behaviour in ...
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How to foword firefox graphics from remote to local system?

I have installed CentOS7 in virtualbox through vagrant. Both guest and host operating system is CentOS7. Guest operating system is minimum installation of centos7 with no graphics. On both system I ...
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Displaying X programs on remote systems

I have Ubuntu 14.04 and Fedora 20 as a test environment. I am trying to send X programs from Fedora to Ubuntu through an SSH session. My setup is as follows: On Ubuntu ran: Xhost +IP Address of ...
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Is it safe to run GPG tools in x11?

Given the relative (anyone with my present user permissions can swipe scancodes) ease of keylogging in an x11 environment, should I run GPG tools only in the TTY?
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Why does Caps Lock key behave as Caps Lock key without the Lock modifier?

At first, there is no key mapping. The Caps Lock key on my keyboard behaves as Caps Lock. lone@debian:~$ xmodmap -pke | grep Caps_Lock keycode 66 = Caps_Lock NoSymbol Caps_Lock lone@debian:~$ ...
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After mapping Caps Lock to Escape using xmodmap, how to revert Caps Lock back to Caps Lock without altering Escape key?

I have mapped my Caps Lock key to function as Escape using this command. xmodmap -e "remove Lock = Caps_Lock" -e "keysym Caps_Lock = Escape" Now how can I undo this mapping? I tried the following ...
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How to obtain mouse events from the kernel when X is active?

When switching to a virtual terminal on my system, The kernel successfully delivers mouse events to a generic input event interface -/dev/input/event6 in my case- as well as legacy interfaces mouse1 ...
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2answers
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How are window-ids given out by MATE window manager?

While trying to write a script involving wmctrl ( since MATE on LMDE 2 doesn't offer as many advanced features as other WM configurations involving Compiz, which I don't have on LMDE 2), I came across ...
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X11 forwarding Amazon EC2 significance of sequence number in DISPLAY variable

I am X11 forwarding from an Ubuntu instance hosted in a Amazon EC2 to my localhost. I am able to do the forwarding only when the remote (Amazon EC2) DISPLAY variable is set to localhost:10.0 I ...
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21 views

emacsclient connection refused

I am running emacs in daemon mode and I got dissconnected from the server on which it was running. After re-connect, when I run emacsclient -nc I get the error connect localhost port 6012: ...
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Gnome - input source not working

I have Elementary OS and there is problem if custom keyboard layout should be added, because currently the switchboard-plug-keyboard uses hardcoded layouts from data/layouts.txt and does not scan ...
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22 views

Enabling X11 forwarding permanently

I have a PHP program and in order to run a batch file, I have typed: $> xhost + $> ssh username@hostname -X $> ssh username@hostname -Y And, it works fine. But, my problem is that when I ...
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3answers
59 views

How can I copy text from xterm (Awesome, Debian, VirtualBox)?

I ran the minimal Debian installation inside a VirtualBox instance, installed X11 and Awesome window manager manually (without any custom configuration yet) and installed VirtualBox additions as well ...
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1answer
34 views

How do I enable Shift Lock? (Sticky shift key)

I want to map one of my keys the shift lock key. In my understanding, the shift lock key is a kind of a 'sticky' shift key: it remains pressed, shifting all keys of the layout until pressed again. It ...
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1answer
14 views

Keep aspect ratio true to the mode

I've recently installed Linux Mint 17, replacing my ageing Mint 13 installation. I've got a 16:9 screen. In case it matters, my graphics card is an NVidia GeForce 210. Now back in Mint 13, if a game ...
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40 views

X stopped working

A couple of weeks ago I made a system upgrade (aptitude upgrade) on my Debian Stretch x64 system. I finished my session normally, but since then I cannot access X anymore. When I turn on my computer, ...
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Difference between 'xhost + ' and 'xhost +SI:localuser:AnotherUser'

If I do xhost + >access control disabled, clients can connect from any host su AnotherUser -c xterm an xterm popups, but if I do xhost +SI:localuser:AnotherUser >localuser:AnotherUser being ...
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su success, but says No protocol specified

I can successfully log in as root on Debian Jessie as follows ...:~$ su Password: No protocol specified root@... It's a fresh installation, just a few applications added so far. I just had to do ...
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Debian - X11 not displaying until switching VTs

I am trying to make my own very light Debian-based system, using Fluxbox as window manager and Slim as login manager. I just added Slim but I had a problem before that, being that X11 worked ...
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2answers
37 views

Using reverse SSH tunneling in one step instead of two steps (with -X)

Suppose we have three hosts: miki - my computer behind a NAT vps0 - my VPS mum - computer of my mother, behind a different NAT. The task is to connect from my computer to my mum and keep X11 ...
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24 views

Installing libx11-devel from source, error in string.h

I'm running Linux version 2.6.32-504.8.1.el6.x86_64 (mockbuild@c6b9.bsys.dev.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-11) (GCC) and trying to install libX11-devel from source on a ...
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Using remapped Left Control <LCTL> key as shortcut

I have remapped the <LCTL> key to Tab in /usr/share/X11/xkb/symbols/en using key <LCTL> { [ Tab, Tab, Tab, Tab ] }; key <MENU> { [ Alt_R, Alt_R, ...
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How to detect whether a window is in focus?

I'm not experienced in scripting but I've made this script: #!/usr/bin/env bash # hint: use "xdotool getmouselocation" to get values if xdotool getwindowfocus getwindowname | grep -Eq " - ...
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Create shortcut in Windows to launch xterm on remote server via SSH and X11 Forwarding

I am not sure if this should go in Windows, but I figured the Unix section would know more about this. I am running a CentOS VM on my Windows 7 host and would like to have the ability to simply ...
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52 views

Swap shift and caps-lock

I would like to swap the behavior of the two keys Shift and Caps Lock on my keyboard. I have read the options in /usr/share/X11/xkb/rules/base.lst, played around with'em, but none of them seems to be ...
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134 views

Why is my R graphics device not refreshing and gets drawn so slowly through VNC?

The plotting speed of the graphics device is extremely slow when I use a VNC connection. The rest of the connection works perfectly fine so I cannot blame the network, it is specifically R devices ...
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System clipboard flushed out, once i exit vim

I use yy to access the system clipboard always. yy is mapped to a function as, function! Copy_ToSystemClip() .w !xsel -ob end function inoremap yy Copy_ToSystemClip()<CR> It copies to the ...
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Remap key to two modifers or use meta shortcuts in terminal (terminator)

Background: Running Arch Linux on KDE. KDE shortcuts have a problem with being saved past reboot so i'm using xmodmap and xbindkeys. So I am using xmodmap. Right now caps lock is mapped to meta ...
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Why are the X11 window identifiers so large (long unsigned) integers?

I would imagine that the window IDs would simply be the count of windows for a specific display but why are they in practise so large?
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101 views

Why isn't there a Unix API?

Why isn't there the Unix API? I mean, as there is the Windows API. I know a lot of things in the Unix world is modular, and those things put together creates a whole system. This sounds good but does ...
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Emacs, window mode is not seeing .bashrc shell variables

I launch emacs from my ubuntu menu bar icon and when i try to access .bashrc variable as, (getenv "ENV_VAR") it returns nil. I collected Gilles' inputs on this issue, added the line . ~/.bashrc ...
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4answers
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Insert both characters if a dead key combination is not recognized (e.g. 'a → á, 'b → 'b)

When I use any variation of English, US international (with dead keys,altGr dead keys or alternative) on my Linux Mint machine I always encounter this behaviour. When I press one of these keys: ' " ...
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0answers
59 views

X11 controlling root window or setting a window to be the background window (wallpaper)

I would like an animated background image. Or better, to make an application be the background, with no interactivity, so I don't accidentally click on it. I've seen many discussions about setting ...
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Displaying a remote window in a EOD session

Please can someone tell me how to display a remote window in a EOD session? The usual way of setting "setenv DISPLAY local.host.com:192" in the remote session and doing a "xhost +" in the remote ...
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33 views

Ctrl + y on shell terminal, paste from system clipboard [duplicate]

I use emacs style bindings for my bash terminal. And i use only the system clipboard and never use any of the application specific/primary selection stuff. When i copy text from emacs window and use ...
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2answers
36 views

Cycle between open windows with wmctrl

I have a script that I'm trying to use to make handing applications easier. Right now it gets the window id of an application name (the first parameter) and checks if the window_id exists or not. If ...
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1answer
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Clear X clipboard using cron [duplicate]

Is there any way I can clear the X clipboard from a cron job? The usual commands for xclip don't seem to work. echo -n | xclip -selection clipboard doesn't work from cron.
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Unable to operate mouse in GUI on Ubuntu Server in VBox VM

Mouse can't work on Ubuntu Server (minmal virtual machine mode) in VBox VM. I ran: sudo aptitude install --without-recommends xserver-xorg-core sudo aptitude install jwm startx output: -bash: ...
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“Replay” feature (repeat / rewind)

This occurred to me playing some games where there is no live rewind feature. Basically what I'm looking for is an application which records the screen, and - when pressing a shortcut - rewinds what ...
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2answers
123 views

Run an app with a window manager behind in a separate X server

I want to launch an app in a separate X server. It needs a window manager behind it, though. I created a script #!/bin/sh x-window-manager & my-gui-app and launched it with xinit ...
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1answer
45 views

Can't enter capital letters using shift key

In some applications entering capital letters works like hitting ESC key. Reproducing: Open LibreOffice document Select "Save as" (Unity dialog) Hit "Create folder" Enter a capital letter using ...
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1answer
26 views

Remove formatting from copy/paste buffer

Whenever I copy any text via X11's copy/paste feature, I would like all formatting to be removed. I waste time daily dumping the text into a terminal, then copying again. Is this possible?
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1answer
28 views

invalid MIT-MAGIC-COOKIE-1 error whenever computer falls asleep

Whenever my laptop falls asleep and is woken up (Lenovo Thinkpad X1 Carbon Gen 3), certain applications will no longer run. For example, when trying to launch dmenu or google-chrome-stable (XMonad ...
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1answer
39 views

How to programatically control X11 forwarded apps?

I'd like to set-up X11 Forwarding to run remote X applications on the server and X11 client can handle the UX interaction. However I would like to configure the X11 client or fake it to actual do the ...
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Middle mouse button behaviour in Iceweasel (FireFox): paste at *text* cursor

In Iceweasel under Gnome on Debian Jessie, the middle mouse button exhibits the following behaviour: If clicked on a hyperlink, it opens the link in a new tab. If clicked anywhere in an editable ...
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3answers
189 views

Larger “xterm” fonts on HIDPI displays

After several years of happily using different terminal emulators like Konsole, Gnome-TERMINAL, and lately XFCE Terminal in their appropriate desktop environments, I decided to use good old xterm with ...
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1answer
67 views

Create an ARGB struct for C header from a PNG

I need to update a logo bitmap to an updated logo. The existing code uses a C header which is loaded via XChangeProperty. I have looked into imagemagick and the Gimp in order to convert the updated ...
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How do I run X11 applications over ssh from a Gentoo server that does not have a GUI installed (with minimal added software)?

Currently I am renting a VPS from VPS.net running Gentoo. How can I run "X11" applications remotely without installing a full GUI on the VPS. What is the minimum pieces of "X11" I would have to ...
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1answer
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Play videos in a different screen without showing desktop environment and cursor interactions in Gnome

I'm editing videos for a live music event. There's a video for each song. I'll have a projector and each song will have a video playing in a big screen behind the artists. I have the length for each ...