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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X11 connection rejected because of wrong authentication for one display number

As stated in the title, I am having this error when I have ssh into a remote server with a certain display number assigned. There is not X11 forwarding problem since I can use GUI application as usual ...
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How do I activate Xorg record module on Raspian?

I'm trying to automate some tests on my RaspberryPi and I'm using python's pymouse to perform some emulated clicks. On my Debian it works fine, but when it comes to Raspian it keeps failing with this ...
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manipulate multiple windows simultaneously

this is probably a long shot but I've been pondering it for a while. I realize that the actual use-cases of this sort of interaction are quite sparse. The main uses I can think of would be moving ...
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23 views

Generic screen reset for borked X display?

Is there a generic way to reset the display on a borked X session? Let's say that you open your laptop screen after it's been put to sleep, and the display is blank, or scrambled beyond visibility. ...
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37 views

X11 stops rendering during automated testing while switched to different run level

I am running automated tests on an app while recording the desktop for future analysis. I am working from a standard Ubuntu Linux setup. I would like to be able to switch to another user while ...
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Is it Possible to use Mouse Movement in a Shortcut?

I'm interested in creating shortcut keys that use mouse movement as part of their trigger to send a keycode, for example so that I could have a shortcut like: ctrl + alt + [mouse movement down] ...
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37 views

change keyboard layout

i have hp pavillion g6 running manjaro, the keyboard looks like this, i broke both shift, the left ctrl and the caps lock... hmm while trying to clean it... i don't really care about ctrl, the other ...
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X11 forwarding but open links locally

I have X forwarding between two machines. I doubt it matters, but the local machine is Windows running PuTTY and Xming. Is there any way that I can click a web link on a remote application and have ...
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83 views

How to properly change the keyboard mapping?

I will try to describe the problem in details. Very often I use external keyboard with my netbook. The keyboard is "TK Stealth": Click to zoom You can see, that the numpad, is very similar to the ...
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How to zoom into my desktop but maintain high resolution for fonts etc?

I recently bought a 4K screen (or UHD i.e. 2160p to be exact) and use it on my tower running Arch Linux. As a window manager I use awesome which runs on top of compton for tear-free compositing, as ...
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-X flag (X11 Forwarding) does not appear to work in Windows

I am using Open SSH (OpenSSH_6.6.1p1, OpenSSL 1.0.1i 6 Aug 2014) in Windows 8.1. X11 Forwarding does not appear to be working. The DISPLAY environment variable does not appear to be set. For ...
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Modifier keys in compose sequence

How is the syntax for .XCompose for sequences containing modifier keys? The manpage says (! MODIFIER ), but I did not manage to make it work. How is, e. g. the syntax for, let's say first AltGr and a, ...
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Why does my window manager (stumpwm) show a cross on the mouse pointer when it is over the root window?

My mouse pointer turns into a cross when there are no elements under it other than the root window. I've been having this issue with stumpwm since I installed it, but I know that a cross over the root ...
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133 views

How can I change the default background color of all windows in X?

I've noticed nearly every window, pop-up, right-click menu, and button all take on this same shade of gray. In the attached picture, you see PCManFM, Leafpad, and Audacity all use this color for their ...
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99 views

fail to start graphical.target on centos7

could not start graphical target after installing kde from minimal centos. startx works fine though. the system has two vcpus and 1GB ram. $ cat /etc/redhat-release CentOS Linux release 7.1.1503 ...
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318 views

Can't get GUI login screen on Debian Jessie [after upgrade from Wheezy]

As the title explains. Upon boot GDM3 is correctly started but hangs at the splash screen and no GUI login box appears. The only way to log into the system and graphical interface is following these ...
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33 views

X without Display Driver

If I would install xserver and a window manager without installing an display driver (xorg-video-intel for example) would the performance suffer a lot? Would I actually see or feel a difference in: ...
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312 views

Running Firefox in Xvfb: extension “RANDR” missing on display

I'm trying run Firefox headless with Xvfb in Debian 7.8. I run Xvfb (I tried with +extension RANDR and -extension RANDR) $ sudo Xvfb :10 -ac [dix] Could not init font path element ...
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Cursor position, dragging and resizing windows… with multiple monitors

I was finally able to get my four identically sized screens to work together, with three on one graphics card ( GeForce GTX 750 ) and one on a second card ( GeForce GT 730 ) in X11. It was a really ...
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How do I bind AltGr+key to a symbol?

I want to bind AltGr+W to æ, and some other combinations, how can I do this? I also need AltGr+Shift+W to Æ. I normally use setxkbmap to change the keymap.
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How to recover missing serverauth so user can startx?

I've been using PCLinuxOS. All was OK until the Hard Drive had a bad block. After some fsck repair, from the shell, I tried to startx: xauth: file /home/joe/.serverauth.2052 does not exist. ...
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How to custom-tweak X resolution settings

Or should I rather phrase the question: how to construct a custom mode. The story is: I am a proud owner of an old EIZO monitor (IPS, etc...) which has started to display this flaw of bad lines. I.e. ...
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X Windows special programs: do some of these still exist? Which ones? [duplicate]

I recall that X11 provided a number of "fun" programs accessible via unix. For instance, if you use the command xeyes, an interface will pop up of cartoon-like eyes which follow your cursor ...
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47 views

X Windows special programs: do some of these still exist?

I recall that X11 provided a number of "fun" programs accessible via unix. For instance, if you use the command xeyes, an interface will pop up of cartoon-like eyes which follow your cursor ...
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How I can make new pop up windows to appear in the same desktop of their app?

I'm using XFCE and I have the following situation: I open app on desktop #1 --> switch to desktop #2 --> app on desktop 1 opens a pop-up window on desktop #2. How do I change it? How do I make XFCE ...
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257 views

How to find out the current (active) XServer DISPLAY number?

I'm using Arch Linux and things are not so easy when you try to discover the current Xorg DISPLAY (not through the env variable). Here is a working example: $ cat /sys/class/tty/tty0/active tty2 ...
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Is possible to have full guest system under host installed via DebootstrapChroot?

My goal is installing Ubuntu 14.04.2 LTS under Debian 7 wheezy with full GNOME Desktop. I know I can use use tools like VirtualBox etc. but it seems like overhead. To be more precise under this Ubuntu ...
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35 views

xkbmap remap PrtScr and Insert Keys to Home and Escape

I've been fumbling with xkbmap for a while, and I can't figure out how to remap the Print Screen button to Home. It's as if the us keymap just doesn't mention the PRSC key code at all. I can't use ...
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117 views

How to display a digital clock on the monitor on top of everything?

My graphical environment is FVWM2 on OpenBSD. How can we display a digital clock in the top right corner of the screen, on top of everything? So it shouldn't matter if a new window comes up, the ...
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19 views

fontconfig availability on major linux systems

I need to install a font on my qt-based app, the function to do so says: Adding application fonts on Unix/X11 platforms without fontconfig is currently not supported. Since I'm a linux newbie ...
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587 views

How to know whether Wayland or X11 is being used

So I just installed the latest Kali Linux on my laptop which was based on Debian 7 (olstable). I then dist-upgrad-ed the whole thing to Debian 8. I've always wanted Wayland instead of X11, so I ...
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124 views

prevent multi-line paste in bash

I often use ctrl+c to copy text from some gui application and then paste it into my terminal emulator (terminator), using right-mouse-click-menu and paste. Sometimes I forget that the clipboard ...
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1answer
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Botched file op left a shade of “almost dropped” file, how to remove it?

One picture is worth thousand words, so: I know log out or restart most likely will do the trick. I want something that doesn't require them. Tried - no use: xrefresh xrandr tricks (revert, change ...
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1answer
110 views

Can I scale my HiDPI laptop display while leaving my external display unchanged?

I have a Chromebook Pixel 2, which has a HiDPI screen. My external monitor has the same resolution in width, but only about half the pixel density. I use Gnome's scaling settings to make things look ...
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PuTTY, CygwinX, and X11 forwarding connection refused

I am no longer able to forward X11 using KiTTY/PuTTY to CygwinX. I am connecting to an Ubuntu Server 14.10 machine that is correctly configured to allow X11 forwarding. I am able to initiate X11 ...
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25 views

Ignore a bluetooth mouse events

(using Ubuntu 14.04.2, X/Gnome/Unity) I'm trying to have Gnome/X to ignore a given Bluetooth mouse events. The mouse should be paired successfully, though. The reason being that the mouse is used ...
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Can you assign arbitrary keybindings in xmonad?

I know how to set up keybindings where you have to hold down one of the keys of type KeyMask. Which are: Alts, Ctrls, Windowskeys. Also, giving 0 as the KeyMask can be used to define single-key ...
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69 views

How to change the DISPLAY that an X application is running on (in Linux)?

I know that I can specify what display an X client runs on with a command like gedit --display :0 in Linux. I want to move an application to a different display after it has started. How can I do ...
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Have 1920x1200 and 1024x1280 monitors combined to 2944x1200. How to use the 80 unused lines of screen area on the 1024x1280?

The left monitor native resolution is 1920x1200 in landscape mode. The right monitor native resolution is 1280x1024 but rotated to portrait mode, so 1024x1280. Because the mouse would get trapped in ...
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1answer
79 views

Running remote GUI application over SSH as a standard non-admin user [duplicate]

I'm running a HelpDesk for internal call center employees. All employees have headsets in conjunction with their jobs, and I'm working on a script to remotely launch a minimized Mumble session via ...
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Run script after changes in X server geometry

Is there an option to run a given script after the X server geometry is changed (or every invokation of xrandr)?
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In X11, how can I create a custom key combination that maps to PgUp, PgDn, Home, and End?

My keyboard does not have keys for Home, End, Page Up, and Page Down. I would like do the following: Map Shift+Alt+⇦ to Home Map Shift+Alt+⇨ to End Map Shift+Alt+⇧ to Page Up Map ...
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Changing dwm keyboard in linux [duplicate]

I can't get dwm to set the keyboard layout. I have tried changing the file /usr/share/xsessions/dwm.desktop. I have changed the line Exec=dwm by Exec=/home/atc/dwm-init with this ...
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How to make the multiuser access to x11vnc in FreeBSD 10.0

I try to set up the multiuser access to KDE via x11vnc using x11vnc -guess I receive an login screen on vncviewer, but after user registration, when display:0 is created, other clients also get ...
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X11 sessions: when a session starts and ends, does `gdm` run a session?

I'm quite confused with X11 sessions. Namely, I don't understand, when an X session starts: I want to programmatically start an X session with my own bob-session program, analogous to gnome-session. ...
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1answer
29 views

Find processes reacting to a given keybinding [duplicate]

Is there a way to know which processes are listening to a given key binding? For example, suppose I want to know which programs will do something when I press Ctrl+g. I guess the X server manages ...
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56 views

What is the reason for the apparent lag of a mouse pointer when running a Linux Desktop?

So this question might at first seem a little vague and it's most certainly not trolling or having a dig at Linux. It's always been my observation that most Linux based desktop GUIs seem to have ...
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What are the differences between xdotool and xautomation?

xdotool and xautomation are two command line X11 automation tools. I've used the former for a while and only recently found out about the existence of the latter, and I'm curious to know what someone ...
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104 views

Map Right Alt to Alt instead of AltGr

I have a Kinesis Advantage keyboard and I'm trying to make it so that my right and left Alt keys do the same thing. Currently the left Alt key works as expected but the right Alt key just allows me to ...
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2answers
238 views

What are .serverauth.##### files in my home directory?

The files are .serverauth.##### where ##### is a 5-digit number. I have a handful of these files in my home directory with a broad range of creation dates spanning a couple of years. What are these ...