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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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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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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33 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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X11: XRaiseWindow and XLowerWindow do the opposite of what is expected. Why? [migrated]

While trying to implement click-to-focus in my custom window manager, I noticed that windows were lowering when I clicked on them, instead of raising. The lines in question looked like this: ...
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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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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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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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1answer
30 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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186 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 ...
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1answer
34 views

Turning off part of a monitor

I'm trying to disable the right third of my monitor, since it's broken. I can get less to be displayed using xrandr, but the monitor will then center the displayed stuff, so that's not quite what I ...
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1answer
43 views

How do you make a toggle key using Autokey?

I want to use Autokey to toggle the e key on and off in a program called "xyz". So if I press e, the program thinks I'm holding down e. I press e again, it thinks I released it. How do you do this ...
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Difference between server-side and client-side compositing in Xorg?

xcompmgr provides the following option: -s Server-side compositing with hard-edged shadows. From experimentation, I can say that this is much, much faster than the "client side" options. But ...
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Missing KeyPress event

I got new thinkpad and it's missing a ContextMenu key and has PrintScreen key where ContextMenu should have been. I remapped it using xmodmap. The problem is, the key is missing KeyPress events, only ...
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urxvt- play mp3 instead of beep

Does anyone know how to make urxvt play a mp3 file in replacement of a system beep? My PC does not have a pc speaker so I need a way to make terminal notifications go through sound card.
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How can I uniquely identify different GVim instances?

With gnome-terminal, I can use the --role command line argument to make the new terminal window uniquely identifiable by the window manager or other applications, for example: gnome-terminal ...
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FVWM: Make xterm stay on top, conditionally

Algorithm: If there is no window currently on top, then make the next new xterm stay on top (layer 6). I got that to work: Module FvwmEvent AddToFunc MyUpdate + I WindowStyle StaysOnTop AddToFunc ...
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Run a script on window focus [closed]

I have a wacom tablet and I'd like to change the button configurations when I change applications. I figure I should run a script to override the previous xsetwacom configuration every time the focus ...
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setxkbmap: Multiple layouts with different variants

Using setxkbmap from a user's .xinitrc, I'd like to configure: German keyboard layout (de) without dead keys (variant nodeadkeys). French keyboard layout (fr) with dead keys (variant basic). So ...
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How does one use the setxkbmap -geometry option?

I have a Sun Type7 keyboard on my Debian Linux (/etc/debian_version == 7.8) box, and, since it appears to be much like the Sun type6 I attempted: $ (setxkbmap -model sun6 -layout us -geometry ...
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Modeline for Dell U2415 1920x1200 resolution

I'm trying here to run my secondary display (U2415) on the native resolution 1920x1200. Xrandr unfortunately reports only 1920x1080, which is not satisfactory. $ xrandr Screen 0: minimum 8 x 8, ...
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Java programs steal focus in X11

I run IntelliJ IDEA & some other Java GUI apps on my linux box. Every one of them tends to steal focus when launching up, and doing it in stealthy way. E.g.: I run IDEA, it starts up in ...
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Can I put multiple X windows into a single larger window?

Say my main process spawns a couple windows. I'd like to group them in a session-leader master window (a just-the-frame minidesktop for the window group if you will). What can I do to achieve this? ...
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1answer
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Cannot log in to my Debian Wheezy 7 system

I have a Debian Wheezy 7 installation. When I turn it on it boots to the log in screen normally. However when I type in my username/password and try to login the screen briefly turns off for about one ...
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Xorg configuration hook for unblank screen

Is is possible to execute a command automatically when X comes out of a power saving screen blank? I.e., something that would be triggered when I hit a key/move the mouse to power up the display ...
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ssh with -Y results in “shell-init: error retrieving current directory: getcwd: cannot access parent directories…”

I ran an X app sudo'ed from my normal account, using: mylappy$ ssh -Y me@myhost.com me@myhost.com's password: [me@myhost ~]$ sudo su - [root@myhost ~]# su - me -c 'xauth list' |\ grep `echo ...
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1answer
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Nvidia drivers debian wheezy

I had some problems with my graphics card. I tried following the instructions from here https://wiki.debian.org/NvidiaGraphicsDrivers to install the appropriate drivers. The result is I can't ...
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What is `/tmp/.X11-unix/`?

I asked Google the same question and didn't like the results I got. What is /tmp/.X11-unix/?
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How to keep displays “set” and not vanishing when screenblanking or turned off?

I have thee screens and am finding it very annoying and distracting to find (1) my X settings have changed to make the leftmost Primary and not aligned right, and (2) all the windows moved onto the ...
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How to set up XKB to work with 3 modifier keys and 2 switchable layouts?

Consider the following XKB layout: xkb_keymap { xkb_keycodes { <ESC> = 9; <FK01> = 67; <FK02> = 68; <FK03> = 69; <FK04> = 70; <FK05> = 71; ...
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1answer
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How configure properly vncserver in Red Hat Enterprise Linux Server release 6.5

I'm trying to start vncserver in a Red Hat Enterprise Linux Server release 6.5 with an user created for that, and when I type vncserver I got this: WARNING: The first attempt to start Xvnc failed, ...
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build X11R7.7 from sources - in which order

Is there an automatic way to understand the order in which individual libraries of the X11R7.7 package should be built when I want to build all of util, lib and xcb?
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My shift/ctrl and numlock keys stopped working

My ctrl and right-shift keys are not responding, though they still work in a VMware window. Numlock doesn't work. A held-down key does not repeat. clicking in a field in another window does not make ...
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Cannot resize windows remoting-in through X11VNC?

As title says, I am remoting on to a Linux box (CentOS 6) using X11VNC. However, I cannot resize any windows manually by hovering over the frame, because the frame resize cursor does not appear. ...
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1answer
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Copy to both X11 clipboards from vim

As far as I can see, with VIM I can choose between set clipboard=unnamed - yank to X11's primary selection buffer (middle-mouse button paste) and set clipboard=unnamedplus - yank to to X11's ...
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General way of debugging vmware mouse issues in X11

I run a virtual vmware archlinux installation, and constantly have problems with mouse grab/ungrab. At some point it was fixed by commenting out pointer lines in 10-evdev config, but on every update ...
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How do I obtain a handle to the Window Manager frame for a given Window in Xlib?

So I'm making a screenshooter app that gets the active window using XGetInputFocus(); but when I try to take a screenshot of that window using XGetImage, I get an image without the window decorations ...
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1answer
36 views

Start a single color full screen from the terminal

For testing displays, I need to show a single color fullscreen, and quickly switch from one to the next color. Can this be done from the terminal? Something like this: DISPLAY=:0 color #ff0000
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Xmodmap remapping Caps, but still triggering Caps Lock

Im using CentOS 6.5 workstation, pretty standard config, with normal dell keyboard, EN/US lang and keyboard layout. I have the following in the .Xmodmap keycode 66 = Control_L clear Lock add Control ...
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Remapping Caps Lock to Compose

Because I now and then need to use scandinavian letters despite using US Dvorak as my layout, I would like to use Caps Lock as a compose key. (I don't need Caps Lock at all, I'm not a forum troll) ...
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X11 oddness - Installer shows squares instead of text. Font issue?

Using X11 and launching of X applications generally works (using xming). However when launching websphere installation (IBMIM) the resulting gui interfaces shows squares instead of letters. Have ...
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How Are Keys or Keycodes Mapped to X Key Symbols?

I am trying to map a function key combination to an XF86 key symbol. The key combination is Fn+F1, which I was able to use showkey to get the raw keycode for. jason@io ~ $ showkey kb mode was RAW [ ...
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2answers
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What's the closest you can get to rebooting without killing all running processes?

How can I get the effect of rebooting on refreshing the system (freeing resources and reinitialising them) without killing most of the things I have running? Could I unload and reload kernel modules? ...
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3answers
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startx autologin does not run in /etc/inittab in after Debian Jessie update

I installed a minimal Debian system (stable) without GUI, switched to testing/jessie to be able to get the Cinnamon desktop, but X didn't start on boot. If I log in as myself at the CLI, I can type ...