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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 to make X load it...

Should I put my custom commands in a file that already exists? Where is it? Should I make my own xorg.conf file and put it in /etc/X11?

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up vote 8 down vote accepted

For Nvidia based cards I suggest to install the binary driver from the repositories and then run nvidia-xconfig. It will create a fishbone with basic configuration. Similar commands for other binary drivers may exist.

If there isn't, just start by creating the file and enter your settings.

All configuration not set will X find by itself. It has a lot of heuristic, but yes, it may be hard to find the right setting keywords and values in order to tweak everything to your needs.

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I installed the driver but it didn't make the x file. But I resolved my issue anyways. – parker.sikand Nov 17 '12 at 20:28

If you would want full and proper xorg.conf file (tested on Ubuntu 12.10):

  1. switch to console mode: Alt+Ctrl+F1
  2. kill x server: sudo service lightdm stop
  3. generate new xorg.conf file: sudo X -configure -- this will create file in your current dir
  4. rename and move: sudo mv /etc/X11/xorg.conf
  5. return to GUI: sudo start lightdm

taken from Linux Mint forums (go to point 3. In Mint, xorg.conf is not present by default...)

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Running Gnome 3.12, I replaced lightdm with gdm and it was generated. Thank you! – Rasmus Jun 13 '14 at 13:03
This solution saved me after hours of trying on my own. Thanks so much! – deltree Nov 24 '14 at 22:53

Figured it out. It's as simple as making a file called "xorg.conf" and putting it in "/etc/X11/". I guess I thought that seemed too simple :P

X will read the config file and try to accept your statements. It will then auto config anything you don't explicitly say.

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