Questions about X.Org Server (commonly known as Xorg Server, XServer or Xorg), the software that runs the X window system used by most desktop window managers (GNOME, KDE, etc)

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16
votes
2answers
9k views

.xsession. .xinitrc, xmonad, and lightdm

Let me preface my question with the following: I am pretty sure that I can hack together a solution by modifying /usr/share/xsessions/somesessionfile.desktop and make it run /etc/X11/Xsession, and get ...
16
votes
3answers
15k views

Switch between nvidia-current and nouveau without a reboot?

Is it possible to switch between Nvidia's BLOB and Nouveau video drivers on-the-fly? I think I need to be able to: [✓] Unload nvidia [✓] Unload nouveau [✕] Restore the console ...
16
votes
1answer
3k views

Multiple keyboards with different layouts

I have ubuntu (11.04) running on a recent macbook pro. I use both the built in keyboard and an external keyboard. I want to remap capslock on both keyboards to super, and I want to swap left-alt (mac ...
16
votes
3answers
3k views

How are key codes mapped to the appropriate action?

After figuring out how to change the mapping of scan codes to key codes using udev, see this question, I was wondering how those key codes (or events if you will) are mapped to the appropriate action. ...
16
votes
1answer
808 views

(alt) and (super) keys suddenly stopped working in gnome 3

For my daily work I use two keyboard layouts: The normal German Qwertz (setxkbmap de) as well as Neo (setxkbmap de neo). Yesterday suddenly between switching back and forth between keyboard layouts ...
15
votes
6answers
49k views

Run application on local machine and show GUI on remote display

Is it possible to run an application on my local desktop but display the GUI on my laptop (remote X)? I'm wondering if it is possible to emulate a dual-monitor setup using 2 distinct lan connected ...
15
votes
1answer
12k views

Where do I find a list of all X keysyms these days?

They used to be in /usr/lib/X11/XKeysymDB or /usr/share/X11/XKeysymDB, but those have been missing from Ubuntu for a while. I've tried google, but all I get are more references to XKeysymDB or the ...
15
votes
8answers
7k views

Mouse flickering on one of my two screens

I just installed ubuntu 14.04 and the mouse is now flickering on one of my two screens. The other screen doesn't have any flickering. I was previously using ubunutu 13.10 without any issue. If I ...
15
votes
2answers
1k views

Is there a gui application for managing multiple mice/keyboards?

I remember a few years ago seeing an application for Fedora that allowed you to manage multiple mice or keyboards as separate input devices (based on multipointerx technology). With this application ...
14
votes
4answers
15k views

Screen brightness isn't taking effect on a Lenovo Z570

My Lenovo Z570 has two GPU's, nVidia and Intell. Brightness control has no effect what so ever over the screen brightness, and because I've had some major issues in the past when I was trying to ...
14
votes
6answers
38k views

NVIDIA X Server Settings lost on every reboot

I am running a GeForce GTX 770 on a Z87 Gigabyte mobo and dual-boot Windows 8.1 Pro and Ubuntu 12.04.3 LTS. The setup runs smoothly overall except for when it comes to video and 3D performance in ...
14
votes
3answers
10k views

How to run multiple user X sessions on the same computer, at the same time?

I want to have more than one user logged on at the same time, on the same computer. Each user should have a full GUI X session... It's easy enough to log in to multiple concurrent non-X linux ...
13
votes
6answers
35k views

Configure mouse speed (not pointer acceleration!)

Is there way to increase the mouse speed in KDE4? I don't want any pointer acceleration, it's just the mouse speed that I want to change. Edit: Unfortunately, editing the xorg.conf is not an option ...
13
votes
3answers
11k views

Cannot get past login screen

I have lubuntu 12.04, and it was working fine until I installed something and I do not remember exactly what I installed because I was trying to build a ruby gem and it required a lot. now I rebooted ...
13
votes
1answer
23k views

list existing X display names?

How do I get a list of current X display names? Apart from being a useful thing to know, I want this so that (hopefully!) I can use xcalib -invert -alter as suggested in this question to invert the ...
13
votes
4answers
15k views

How do I get a 4k monitor on DisplayPort 1.2 to show as one screen?

I've just picked up a UP2414Q and I've connected it via displayport 1.2 which runs 60hz. The issue is that it ends up showing X two screens, well kind of, so that I end up with it acting as if I've ...
13
votes
2answers
4k views

How can I get my monitor's maximum resolution without the proprietary AMD graphic driver installed?

I am using Ubuntu 14.04. I have an AMD Radeon 5570 HD graphic card. Actually, the default open source REDWOOD drivers aren't allowing me to choose my monitor's maximum screen resolution(which is 1366 ...
13
votes
2answers
23k views

Xconfig xrandr badmatch

Recently I minimal installed my OS, but got an unexpected error while setting my monitor resolution. it seems like a very old problem, but this time there are something else(I think). to install the ...
12
votes
3answers
10k views

How do I run a graphical application on a remote server when logged in through SSH?

I am trying to run gedit from an SSH terminal on Windows, connected to an Amazon EC2 instance running Ubuntu 12.04 Server and I am getting this error: Cannot open display: How do I fix it?
12
votes
6answers
12k views

Why isn't my monitor's native resolution appearing as an option? [closed]

I'm on a clean install of Ubuntu 10.04 LTS. My monitor's native resolution is 1280x1024. However, in the Monitor Preferences application, I am only presented with 640x480 and 800x600 as options. My ...
12
votes
1answer
2k views

How to trigger a color inversion effect for one window?

I want to have an inverse color effect (light to dark) like 'negative' in compiz, but without compiz, and only for one window (like compiz's Super+N) . Is there a way to get a similar effect (...
12
votes
3answers
11k views

How do I prevent .xsession-errors from eating disk space?

Is there any way to completely disable the .xsession-errors file? I have it as a symlink to /tmp so that my laptop hard disk can (hopefully) go to sleep for once, but at least 95% of the stuff in the ...
12
votes
2answers
7k views

What is the X server?

I have been using Ubuntu for quite some time but, I have no idea what the X server is? I hear it quite often. I would like to know what the X Server is and what it does. How ~/.xinitrc file is used ...
12
votes
3answers
40k views

How do I disable intel graphics in a hybrid graphics setup?

I have a Dell Vostro 3700 version A10. The relevant bits from lspci -v | grep VGA are: 00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 18) 01:...
12
votes
2answers
40k views

How do I set the correct monitor resolution with Nvidia drivers for a monitor that does not send EDID?

I keep having trouble getting the correct monitor resolution - every time I reinstall, I happen to use a newer Ubuntu release and the old tricks I used to know no longer work. Instead of leaving a ...
12
votes
3answers
58k views

How to restore xserver?

I have recently killed xserver on my machine after a regular update. I have uninstalled and reinstalled nvidia-current with no success. Looks I have reinstall xserver. How do i achieve this? ...
12
votes
2answers
4k views

How can I start a different X session on tty8?

Let's say, for an example, I want to run a full-screen opengl application on tty8 and have my standard GNOME desktop on tty7. How can I configure Ubuntu to meet my requirements?
12
votes
1answer
2k views

Use local button styles during forwarded X11 session over SSH

Is it at all possible to have a forwarded X11 session be styled with something other than the default X button styles? It doesn't even appear to use my server's actual styles seeing as both computers ...
12
votes
2answers
938 views

KDE Sometimes Glitches On Wakeup

Well, a picture is work 1k words: Looks bad, huh? I am using the 331-updates latest 331.67 drivers from NVidia's website on a Dell Latitude e6400. Everything else is up-to-date. This only happens ...
11
votes
2answers
1k views

Will Mir display server be able to launch X11 applications?

I've checked the wiki but Xorg is not even mentioned there.
11
votes
5answers
10k views

How can I toggle between single and dual monitor setup?

I have two monitors working just right with nvidia driver. There are times, however, where I want to have just one monitor and other times where I need two: I must open NVidia XServer Settings, go to ...
11
votes
4answers
46k views

How to install NVIDIA driver in Ubuntu

I'm running Ubuntu 13.04 on DELL XPS L501 - Nvidia GeForce GT 420M. I'm using kernel 3.9.0-030900-generic. All kernel-headers are installed in the system. and I've tried the following. Use apt-...
11
votes
2answers
41k views

Where is Xserver log file located?

My Ubuntu 10.10 sometimes totally freezes. I suppose that it is somehow related to my graphic card and would like to check Xserver log. Where is this file located ?
11
votes
2answers
26k views

“You do not appear to be using the nvidia x server”(screenshot included)

I am running ubuntu 11.04 at my asus laptop. Laptop specs: CPU: i5-2410M @ 2,3GHz RAM: 4GB GPU: nvidia gforce GT 520M / (also the cpu has a bult-in graphics processor) I am getting this error when ...
11
votes
9answers
23k views

xorg.conf changes from nvidia-setting have no effect after reboot

I have upgraded from 13.04 to 13.10 today and everything works smooth apart from one thing. I have a dual monitor setup and every time reboot the screens have switched places (left screen on right ...
11
votes
2answers
13k views

How to run 2 X sessions with different display managers?

I read about the virtual terminals a little and that gave me an idea. I searched for a way to have two X sessions simultaneously. I had a look at these sites : 1. How to run multiple user X sessions ...
11
votes
3answers
10k views

Extend Desktop to Monitor over LAN

I want to make use of an old laptop by extending my the desktop from my main PC onto the monitor of this other, old laptop over a LAN connection. I've looked into Xdmx/dmx, but the project seems to ...
11
votes
2answers
9k views

Revert to open source graphics drivers - options greyed out 14.04

I tried switching to the proprietary AMD/ATI drivers using the Software Center > Edit > Software Sources > Additional drivers window in 14.04, which left me with a scary black-as-the-night ...
11
votes
2answers
14k views

Free RAM disappears - Memory leak?

On a fresh started system, free reports about 1.5G used RAM (8G RAM alltogether, Ubuntu 12.04 with lightdm and plasma desktop, one konsole window started). Having the apps running I use, it still ...
11
votes
6answers
8k views

Can't get nVidia drivers working with 16.04, logs out right after login

I have installed Ubuntu 16.04 beta 2 on Monday, Apr 18th. When I try to install nvidia-current, nvidia-361 or the version that jockey installs, either lightdm fails to start entirely or I can't get ...
11
votes
4answers
447 views

Is there a way to see the text of tty7 without shutting down Xorg?

Is there a way to see the text of tty7 without shutting down Xorg, just like switching to another tty?
11
votes
0answers
7k views

Where is /etc/X11/xorg.conf? [duplicate]

Possible Duplicate: Where is the X.org config file? How do I configure X there? Where is the xorg.conf file in Ubuntu 10.04? I couldn't find it in /etc/X11/xorg.conf
10
votes
7answers
24k views

After apt-get upgrade system always boot to low-graphics mode

Some time ago I have installed xorg edgers nvidia 331 drivers for my Nvidia 420M with Ubuntu 13.10. Today I have run like always sudo apt-get update && sudo apt-get upgrade -y && ...
10
votes
3answers
89k views

How to make an xorg.conf file

I just installed Ubuntu 12.10 and I need to make a custom xorg.conf file. By default, there is not an xorg.conf file on my system. I know what I need to write in the config, but I just don't know how ...
10
votes
3answers
29k views

How to install Intel 82852/855GM driver?

When I installed Arch Linux, it detected my video card and monitors correctly "out-of-the box". Now I've installed Ubuntu 10.10 "Maverick Meerkat" and it has not. How do I configure Ubuntu to use ...
10
votes
2answers
19k views

How to disable -nolisten?

I just installed ubuntu 11.10. I want to run an x-app from another system. I updated ./xinit/xserverrc and removed the -nolisten option. I rebooted. I can see that X is started with the nolisten ...
10
votes
1answer
18k views

How to check if Xvfb is (already) running on display :0?

Title says it all. pgrep Xvfb only does half of the trick. It will not tell me the display number.
10
votes
6answers
3k views

Will Wayland have network transparency?

The Xorg server/client architecture allows for network transparency which means it is possible to start x-clients on a remote machine and display the GUI on the local machine (i.e. via x-forwarding by ...
10
votes
4answers
3k views

How to set up Ubuntu to automatically turn NumLock on when an external keyboard is attached and off when it is not?

Having NumLock on is convenient when using a full-sized external keyboard (having a keypad) and very inconvenient when using laptop's built-in keyboard (which places digits instead of letters on the ...
10
votes
2answers
2k views

Application-specific key combination remapping?

I'm aware of a number of ways of remapping key combinations in Ubuntu on a global basis (e.g., globally remapping Ctrl+S to send Ctrl+D or something), such as the xbindkeys application. What I need, ...