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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121
votes
6answers
85k views

How do I remap certain keys or devices?

I'm searching for a way to remap certain keys in ubuntu. i.e. I'd like to change PgUp to Home or PgDown to End. Does a built-in command or a tool exist reassign keys in Ubuntu/GNOME?
120
votes
37answers
335k views

How to fix “The system is running in low-graphics mode” error?

Note: This is an attempt to create a canonical question that covers all instances of "low-graphics mode" error that occurs to a user, including but not limited to installation of wrong ...
89
votes
5answers
21k views

Why is Wayland better?

As recently announced by Mark Shuttleworth, Ubuntu will be moving towards using Wayland as its display manager. What are biggest differences between X11 and Wayland? Why will Wayland make Ubuntu ...
64
votes
15answers
139k views

Higher screen resolution for VirtualBox?

I have been trying this for a while but no luck. I installed ubuntu-11.10-desktop-i386 twice. Also installed guest additions. However I always get maximum screen resolution as, 1024 x 768. Do I need ...
54
votes
12answers
75k views

How do I disable X at boot time so that the system boots in text mode?

Is it possible to disable X at boot time? I'm setting up a server so it would be nice if it wouldn't load the graphical interface every time I boot.
54
votes
6answers
186k views

Where is the X.org config file? How do I configure X there?

As Ubuntu 10.10 seems to neither detect my graphics card (Intel 82852/855GM) automatically nor use the corresponding Intel driver even after manually installing it, I am looking into manually ...
45
votes
1answer
33k views

What's the difference between the nvidia-current, and nvidia-current-updates packages?

What's the difference between the nvidia-current, and nvidia-current-updates packages? The former has a higher version number, and the description of the packages are the same. Which do I use? ...
44
votes
15answers
24k views

How do I disable middle mouse button click paste?

Is there a way to disable the middle mouse button paste behavior that is here by default on gnome? I have a sensitive mouse wheel and whenever I scroll texts, sometimes it pastes stuff randomly into ...
41
votes
2answers
28k views

What is the difference between `ssh -Y` (trusted X11 forwarding) and `ssh -X` (untrusted X11 forwarding)?

What is the difference between ssh -Y (trusted X11 forwarding) and ssh -X (untrusted X11 forwarding)? As far as I have understood it, it has something to do with security, but I did not grasp the ...
40
votes
12answers
48k views

How to determine which window manager is running

Is there any way (such as a command or environmental variable) to determine what window manager is the one actively running in the current session?
30
votes
7answers
16k views

How do I remap the caps lock key?

In the past the past I used to use xmodmap to prevent the Caps Lock button from working, and then tell Launchy to handle the key press instead. I can't seem to do this anymore. What is the best way ...
29
votes
7answers
87k views

NVIDIA drivers not working after upgrade. Why can I only see terminal?

Tonight I upgraded to 11.04. Problems. Once I had finished the upgrade, I restarted my computer as it told me too. When I got past the ubuntu 11.04 (purple background orange dots), it simply went to ...
28
votes
5answers
50k views

Nvidia driver doesn't work in 12.10

I have GeForce GTX 560 Ti. I's worked fine in 12.04 with nvidia drivers. Unfortunately, after todays 12.10 update, something broke down. I've tried nvidia-current, nvidia-current-updates and ...
26
votes
7answers
25k views

How can I change the mouse's wheel scroll rate?

I'm using Chrome, and the scroll rate is like 3 lines, and it's painfully slow. My finger gets tired really quickly on long pages. System → Preferences → Mouse lacks any scroll wheel configuration ...
26
votes
4answers
2k views

Is there a way to cheat javascript games (like Unicoin mining) where rapid clicking is required?

I saw that there's a new currency on the site today for higher privileges called Unicoin. You can mine them by clicking quickly. I was wondering if there's any Ubuntu wizardry that could speed up the ...
25
votes
10answers
57k views

Radeon HD 2000, 3000, 4000 on Ubuntu 12.04.2 and higher: fglrx (legacy) unsupported, what to do?

After upgrading to 12.10 quantal, the packaged version of fglrx no longer works. I discovered that this is because there is a separate 'legacy' fglrx driver for the HD 2k-4k series cards, but it is ...
24
votes
5answers
28k views

Increasing scroll speed

I've recently switched to Ubuntu, and the one thing that has been bothering me is the scroll speed, which I can't seem to change. In windows I used to have it set around 7 lines, but it seem to be ...
23
votes
1answer
7k views

I accidentally hit Ctl Alt F<num>. How do I return to the GUI?

I'm using 12.04, I accidentally used Ctl-Alt-F9 and got a black full screen with command line cursor (Terminal). How can I go back to the normal Unity screen?
19
votes
2answers
3k views

How does Middle Click paste work?

I don't understand the middle click paste. Sometimes I highlight text, middle click in the window where I want it to go and it does what I want. Sometimes it doesn't. For instance, when I highlight ...
19
votes
7answers
5k views

Alt+tab out of fullscreen game

Right now I'm running Trine, which is a game using OpenGL running in fullscreen, in Ubuntu 10.10. What I would like to be able to do is Alt+Tab out of the game to be able to browse the web, check ...
19
votes
5answers
16k views

Why is Xorg taking up so much memory and CPU?

I recently reinstalled Ubuntu 11.04 Natty after a massive hard drive failure. Now, for some reason, compiz and Xorg decide it's a fun idea to start eating up my RAM and CPU - GB by GB. Starts out at ...
19
votes
0answers
7k views

How well will Nvidia Optimus cards be supported in 12.04? [duplicate]

Possible Duplicate: How well do laptops with Nvidia Optimus work? Will Nvidia Optimus be supported in 12.04?It will be improvements in nvidia optimus drivers? Will no longer need bumblebee ...
18
votes
4answers
11k views

Is there a software utility to adjust screen gamma/brightness/contrast?

I use to work at night and it is eye-hurting to watch at lightbulb-bright screens (I've got two - laptop's built-in panel and an external 18-inch CRT) in a dark environment. So I adjust my screens to ...
17
votes
5answers
482 views

How to get more people involved in improving X.org for Ubuntu? [closed]

In Ubuntu, X is one of the more critical pieces in the stack. As such, we get a TON of questions and bug reports about it, probably about 100 times as many as we have manpower to handle. Canonical ...
17
votes
3answers
73k views

How to check the information of current installed video drivers?

I have just installed Ubuntu 10.04. My CPU usage is high when I do trivial things such as scrolling through a PDF file. So I think my video driver is not properly installed. I want to confirm that by ...
16
votes
5answers
189k views

How does one exit the X server?

The command sudo service gdm stop would successfully disable the X server in Ubuntu 11.04 temporarily. However, this same command no longer works in Ubuntu 11.10, because "gdm" is an "unrecognized ...
16
votes
3answers
8k views

Turn off monitor using command line

I am runnning Ubuntu Server on my laptop. There is really no reason for the screen to be on. I have been trying to use this command to turn the screen off: sleep 1 && xset dpms force off ...
16
votes
3answers
7k views

Why do I have so many .Xauthority.* files in my home directory?

I'm using Ubuntu 13.04 on a Lenovo X220. Why do I have so many .Xauthority.* files in my home directory? I.e .Xauthority .Xauthority.0JW6UW .Xauthority.2HWRVW .Xauthority.2TA6VW .Xauthority.49F8VW ...
16
votes
6answers
21k views

50-synaptics.conf options not working

How does Ubuntu come up with the default synaptics settings? I've got Ubuntu Netbook 10.10 installed on an Eeepc 900. Out of the box TapButton2 was set to 3, and TapButton3 was set to 2. I have ...
15
votes
8answers
19k views

How to change mouse cursor and theme?

How can I change X11 cursor and theme in the newest Ubuntu? I can't find it. Please help.
15
votes
3answers
4k views

Font corruption: lines through characters

I have a problem where a one-pixel high white line is displayed through certain letters of text. Almost always only a single character type is affected at once, and only in one font size (though that ...
15
votes
2answers
6k 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 ...
15
votes
3answers
2k 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. ...
14
votes
1answer
2k views

Drawing over the desktop

I am wondering if there is anything similar to ink over apps for linux. i.e. , a program that allows me to draw over any other program given Xs architecture, it should be possible, but I looked for it ...
14
votes
3answers
4k views

How do I script to open a set of programs each on specific workspace?

I looked around for a while and could not figure out the answer to my following problem: I have a setup of six desktops on Ubuntu 12.04 with Unity. On start up, every morning, I go through a routine ...
14
votes
6answers
12k views

How to run two X sessions at the same time?

I would like to run two X server instances at the same time. One would be an interactive session using the mouse and keyboard attached to the computer. The other would be a 'virtual' session that I ...
14
votes
6answers
774 views

Xsnow does not work

I have installed the old program xsnow with Apt. This program is supposed to make snow (the type of precipitation) appear on the desktop. However, running the program does nothing except return the ...
14
votes
3answers
3k views

Application which will display the current coordinates of the mouse cursor?

I'd like to be able to display the current location of the pointer on the X display. Is there any application which does this?
14
votes
2answers
643 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 ...
13
votes
5answers
3k views

How can I map a character to a key combination?

I'm a bit of a fan of the interrobang (‽), but it obviously is not on my keyboard. How can I map that character to a key combination?
13
votes
1answer
2k 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 ...
12
votes
4answers
103k views

How to kill and to start the X server?

In 12.04 How do you kill the X server from the command line and from the GUI interface and how do you start it from the virtual terminal?
12
votes
3answers
3k views

How to reverse colors for the current window in gnome shell?

I dislike that most websites use a black font on white background for their sites, as it gets too tiresome for me to read. Back in the days of 11.04, using Gnome2 with compiz, there actually was a ...
12
votes
4answers
12k 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 ...
12
votes
3answers
7k views

How can I diagnose/debug “maximum number of clients reached” X errors?

I'm hitting a problem whereby X prevents processes from creating windows, uttering something like the following into ~/.xsession-errors: cannot open display: :0.0 Maximum number of clients reached ...
12
votes
2answers
388 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
3answers
5k 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?
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
2answers
3k views

How can a script detect a user's idle time?

I want to check, inside a bash script (*), how long the user of a X session has been idle. The user himself does not have to be using bash, but just X. If the user just moved the mouse, for example, ...
11
votes
2answers
22k 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 ...