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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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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12 views

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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1answer
60 views

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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20 views

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 whatsoever....
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57 views

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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94 views

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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42 views

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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369 views

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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2answers
88 views

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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67 views

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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1answer
57 views

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
493 views

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 maintaining/...
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69 views

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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0answers
58 views

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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1answer
168 views

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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59 views

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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1answer
42 views

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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1answer
48 views

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 ...
3
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1answer
75 views

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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1answer
123 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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0answers
123 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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2answers
232 views

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 Terminal/...
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13 views

trigger a Control_Latch in X [closed]

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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2answers
142 views

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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21 views

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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1answer
41 views

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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3answers
83 views

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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35 views

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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0answers
17 views

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
47 views

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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59 views

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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265 views

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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21 views

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 ...
3
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1answer
399 views

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 ...
4
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2answers
968 views

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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2answers
137 views

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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0answers
23 views

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 ...
3
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2answers
47 views

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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2answers
67 views

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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0answers
29 views

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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2answers
31 views

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 ...
4
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2answers
85 views

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 ...
1
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1answer
73 views

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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1answer
64 views

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?
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43 views

What is the equivalent of xset led 3?

I am using gnome on wayland on arch. I used to start my keyboards leds with xset led 3. How can this be accomplished while using wayland?
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1answer
23 views

How do I change the height of GIMP to less than 1266 pixels?

I'm having trouble editing in GIMP 2.8.16 because the window is much taller than my monitor, and can't be resized to anything smaller. From xprop: WM_NORMAL_HINTS(WM_SIZE_HINTS): ...
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1answer
40 views

Is it possible to run a thin client in virtualbox?

I have a Mac laptop for work. I would like to keep my personal stuff off of my work computer. Obviously I can just ssh to my home computer and/or tunnel X using Quartz. But this always feels clunky, ...
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0answers
24 views

Render everything in two colours

Is it possible to recolour everything on the screen, every application, web pages, menus, everything, in two colours (with intermediate shades, i.e. monochromatic)? Some document viewers support this....
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1answer
125 views

RHEL6 && OEL6 How is $DISPLAY determined on startup?

I'm experiencing inconsistent $DISPLAY variables on my OEL6 servers which have caused quite a bit of trouble with socket files. I have found surprisingly little on what actually sets the environment ...
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48 views

Elementary OS Run script at login

I have an old Thinkpad T400 and currently running Elementary OS. Since two finger scrolling does not work out of the box I have to run a command whenever I want it to be enabled. I found the command ...