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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How does GDM authenticate to the X Server?

Given that you usually have to authenticate to the X Server by way of a "magic cookie" stored in the .xauthority file in the user's home directory: How does GDM (like most login processes, running as ...
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2answers
412 views

How do I find out the pixel depth of my graphic card?

Is there a command that can tell me which my graphic card is and its pixel-depth? I am running vncserver and I would like to learn which is the best parameter for pixeldepth (-depth).
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190 views

How do I prevent Skype notifications during a call

If I am on a Skype call with a person (with Share Screen Option switched ON), I don't want to get notified if someone calls me or messages me. They shouldn't know who my contacts are. What should I do ...
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urxvt not loading xft font from ~/.Xdefaults

Some basic details: archlinux 3.9.3-1 xmonad 0.11 urxvt 9.18 I can get urxvt to load my desired font manually using: urxvt -fn "xft:Ubuntu Mono" However, I'm unable to get this font to load ...
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Playing a remote movie on the remote computer

I have two computers (a desktop and a laptop) running linux connected to my local area network. I like to ssh from my laptop over to my desktop and run programs there, and sometimes listen to music on ...
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1answer
197 views

Intel 82845G Video Crash workaround

I have the Intel 82845G video card and trying to get X11 working with it. It routinely crashes with artifacts. I know the existing history with this driver and X11 and I am about to buy a replacement ...
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536 views

Screenshot of non active window

How to take a screen shot of non active window? If I have 2 windows, I want to capture the screenshot of the one which is running in the background.
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1k views

How to Save X Session — ArchLinux+Openbox

I use Arch Linux and Openbox. How can I save the state of my current openbox/X session and later restart them? The scenario is like this: I've several browsers windows open, terminals, file ...
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1answer
306 views

Querying display power status on Linux (Xorg) on command line

Is there a way to query the power status of an Xorg/X11 display from command line? I want to know if my laptop LCD is powered on after the screen saver--apparently the backlight is still on. This is ...
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1answer
364 views

Start the GUI automatically in OpenBSD

I can't find the GUI to start up automatically in OpenBSD hppa 5.3. What commands must I use to get this working? I want to use Gnome like in OpenSuse which I am more comfortable with.
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471 views

Udev rules involving X11 don't run on startup

I have some udev rules written to run when I connect certain usb devices. For example, I change pointer velocity for certain mice, and change xmodmaps for particular keyboards. The scripts work well ...
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4answers
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X11 forwarding not working from putty and XMing to centos 6.4

I have centos 6.4 running on VirtualBox. I can connect to it via putty just fine. However X11 forwarding is not working. I Have Xming 6.9.0.31 running and putty 0.62 is setup for X11 forwarding: ...
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Single key audio capture in Linux (save on key release)

I'd like to run a program that records audio only when the Right Control key is held down. On keyboard release the result would write to disk as, e.g. yy-mm-dd hh:mm.ogg. How might I do that? $ ...
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1answer
9k views

X11 forwarding an OpenGL application from a machine running an NVIDIA card to a machine with an AMD card

I'm interested in forwarding an X11 session over SSH, in order to launch a remote process that utilizes OpenGL (specifically, gazebo for anyone familiar.) The problem that I seem to be running into ...
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1answer
252 views

Virtual mouse driver, possible X11 problems

I created virtual mouse driver according to Essential Linux Device Drivers book. After I wrote coordinates echo x y > /sys/ ... /coordinates into sysfs node, my program generates event packets ...
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So the design of client-server separation is not the bottleneck of X Window?

In the answer of this, it mentioned: People also hear that X uses the "network" and think this is going to be a performance bottleneck. "Network" here means local UNIX domain socket, which has ...
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1answer
319 views

Can AMD and NVIDIA display cards work together on linux?

I know that two AMD graphics cards/two NVIDIA graphics cards can work together ,e.g. in xinerama/crossfire/multi-view. But if I have one AMD graphics card and one NVIDIA graphics card, can I use them ...
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1answer
425 views

difference between X and Xorg executables under Debian 6.0(kernel 2.6.32-5-686)

What is the difference between X and Xorg executables? I have both in /usr/bin directory: # file /usr/bin/Xorg /usr/bin/Xorg: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically ...
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How to prevent the caps-lock toggle effect, without remapping or disabling it?

I have an X11 program that grabs caps-lock, and uses it. The problem is, I want to disable the regular caps-lock toggling, but doing so seems to disable the key. So whatever X11 gets for a caps-lock ...
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How does X-server calculate DPI?

From Xfce Docs: In case you want to override the DPI (dots per inch) value calculated by the X-server, you can select the checkbox and use the spin box to specify the resolution to use when ...
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1answer
397 views

Anti Aliased Fonts with NoMachine NX

I am running nx server on a headless ubuntu server. Its desktop is to Unix -> Custom -> Emacs which gives me an Emacs window on the local machine. The only thing that does not work as expected is the ...
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Launch a GUI browser on server without a GUI? [duplicate]

What's a simple way to launch a browser on an server that doesn't have a GUI, but needs a GUI-like browser? Something like Firefox or Chrome. I need to trigger a page load but it needs full javascript ...
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1answer
179 views

Can I access X11's clipboard from tty1-6?

Sometimes, when I'm running on battery and don't need a window manager, I'll log into tty1, fire up fbterm and Vim and work. Later, if I need the window manager, I'll use the log in GUI but switch ...
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1answer
307 views

Is it possible to x-forward windows apps to linux if windows PC running Xming?

I have been digging around looking for an answer to my question but have no been able to come up with anything. I know that xming server allows you to transparently run linux applications on windows ...
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1answer
439 views

Openbox doesn't seem to have correct environment variables set

I've installed Debian 7.0, and then installed Openbox on top of it. I've got some executable files in ~/bin, and this line in my .bashrc and .profile: export PATH="$HOME/bin:$PATH" I can normally ...
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284 views

Which user owns X display?

How to determine, as root, which user owns X display :0? (on a Fedora 18 system with defaults)
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1answer
724 views

Cannot open GUI after ssh -X and chroot

I ssh ( with -X option ) to another computer then I I do a chroot. I then encounter problems running X11 apps. As one example, after the ssh I would run emacs and it would open a new window as a X11 ...
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2answers
583 views

Two GUI applications as different users on the same screen

I am logged as user A. I want to run a GUI application as user B. User, not root. User B is local too, not remote, I only need different environment variables. I don't want to run the second X, I want ...
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2answers
336 views

Fully Disable PrntScr Key

I recently came across a Linux feature I have never seen before, where pressing the PrntScr button on the keyboard prints a physical piece of paper with the contents of my console. I really need to ...
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3answers
7k views

How to get near-perfect screen recording quality?

Someone suggested I direct a copy of the unmodified X display to a file and afterwards convert that file to a general purpose video file. What commands would I use to do this on a Kubuntu system? ...
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2answers
902 views

Running Mono on CentOS 5 CLI

I have vps server (virtual private server) running on Linux CentOS 5 32 bit , I installed vncserver X-Windows , GNOME and KDE environment and I connect to the VNC server from vncviewer in my Windows 7 ...
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1answer
992 views

Setting mouse speed in Gnome just like in other desktop environments

When I'm using XFCE I can set mouse pointer speed to "Acceleration: 5.0 | Sensitivity: 4 px". When I have to switch KDE I can use same settings because these are simply configuration tools for X11. ...
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1answer
745 views

What are the origins of rgb.txt?

Where did the list of X11 color names come from? Every resource I've found online claims the origin is unknown, but it must be recorded somewhere. The best information I've found was in an archived ...
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3answers
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How to troubleshoot failed X11 forwarding with ssh?

When I try to establish an X11-forwarding connection to myserver, I get the following error: % ssh -X myserver xlogo X11 connection rejected because of wrong authentication. X11 connection rejected ...
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0answers
974 views

A real non-“better touch tools” solution for select-to-copy on Mac OS X

I recently moved to Mac. I am missing my X11 copy-paste style. I can't find a way to exactly emulate X11 behavior "select-to-copy", "middle-click-to-paste" globally on Mac OS X. I am aware that this ...
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1answer
780 views

Setting the minimum pointer speed with no usable GNOME GUI

I use Debian Squeeze x86-64 (Kernel 3.2) with gdm3 and GNOME on a 2010 MacBook Pro. Recently, as I tried changing the pointer configuration, I accidentally set the minimum speed of the pointer to 0 ...
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1answer
691 views

Disable sticky keys

Sometimes my X behaves like it has «sticky keys» turned on. I have no idea how I activated it. Usually hitting the "sticky" key multiple times solves the problem, but it is nevertheless annoying. I ...
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1answer
275 views

Move terminal emulator process from xorg to tty? [duplicate]

Is it possible (and if so, how?) to move a process from a terminal emulator running in X to a different virtual terminal, so that I can restart the X server without killing the process running in the ...
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1answer
622 views

Laptop keyboard occasionally stops working

I have a dirty solution that is to plug a USB keyboard in and execute the following command: setxkbmap -rules evdev -layout us -model evdev Afterward my keyboard will work. This solution only ...
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1answer
298 views

Install x11 on my own linux system

I have developed my own tiny linux file system using buildroot and busybox. I used linux-2.6.38.8 kernel configured and cross-compiled for target system(X86) according to needs.Now the filesystem is ...
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1answer
98 views

Sawfish and fvwm bindings not working when logging in with a display manager

On one machine running Debian squeeze, when I log in with a display manager (I tried xdm, gdm or kdm), none of my Sawfish key or mouse bindings have any effect. If I log in in text mode then run ...
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How to switch xsessions?

I run xmonad/slock/lxdm currently, and I cannot find a way to get a "switch user" system working. Here's what I'd like: key combination returns me to login (applications still run in the background) ...
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1answer
4k views

Can X11 scale to virtual resoltions on HiDPI/Retina screens the way OS X does?

I've recently had the chance to use a Macbook Pro with Retina Display, and its quite clear that the display is futuristic enough to actually warrant Apple's over-the-top marketing. I've got sensitive ...
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1answer
2k views

Mouse and keyboard not working in FreeBSD 9.0

Could not use keyboard and mouse at KDM log in screen in FreeBSD 9.0 KDE Typed on nano: hald_enable="YES" dbus_enable="YES" local_startup=${local_startup} /usr/local/kde4/etc/rc.d" kdm4_enable="YES" ...
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1answer
344 views

Remap altgr key to AC10 in XKB

I'd like to remap the altgr key to AC10 key. So far, I edited /usr/share/X11/xkb/symbols/us as follows: // key <AC10> { [ semicolon, colon ] }; key <AC10> { [ Alt_R ]} After $ ...
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203 views

X windowing system remote desktop procedure? (No VNC, no XN)

I want to display the desktop of my raspberry pi on my laptop. On the rPI runs Raspbian with LXDE. I am on Ubuntu 12.04/awesome. Is it possible to display the complete rPi-desktop on my laptops ...
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702 views

change terminal window default location

How do I change the default gnome-terminal location on screen. I checked out the preferences but they only have option to change default size. I also checked out .gconf/apps/gnome-terminal/ but didnt ...
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219 views

Changing one character in keyboard layout

I edited the file /usr/share/X11/xkb/symbols/us and added a definition with my new layout as follows partial alphanumeric_keys modifier_keys xkb_symbols "us_pl" { include "us(basic)" ...
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0answers
145 views

Is there a way to undo VGA adapter modesetting in Linux

I'm looking for a way to reset the graphics adapter to textmode after it has been set to some sort of graphical mode by the kernel on bootup, and possibly used by an X server. Is there any code to do ...
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2answers
556 views

Why does my Emacs toolbar look different over ssh w/ X forwarding on Cygwin vs CentOS?

I'm using Emacs 24.2.1 installed on a CentOS 5 server, which I ssh into with X forwarding (using -Y). I have both a Windows laptop with Cygwin/X installed, as well as a desktop running CentOS 6. When ...