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 configuring X (shouldn't I?). Where can I find the configuration files I need to edit?
6Even if you come up with a solution, don't forget to file a bug on Launchpad so that this hardware configuration can be made to work out of the box in future Ubuntu releases.– ændrükSep 24, 2010 at 2:14
1We deliberately don't load the intel driver on your hardware because it is too unstable. See this answer: askubuntu.com/questions/4658/…– RAOFApr 29, 2011 at 8:02
The xorg.conf does not exist by default any more. You CAN create one though.
Boot into recovery mode and select Root Shell. Then run:
cp /root/xorg.conf.new /etc/X11/xorg.conf
Reboot and you can edit the new Xorg.conf.
7This is the correct way. It is just that X now auto-detects the settings, and a xorg.conf is not mandatory. If you know what you want to edit, by all means create one. Sep 24, 2010 at 2:10
12There is absolutely no reason to reboot even once. Just open terminal, write
sudo X -configure; sudo cp ...and
sudo /etc/init.d/gdm restart(assuming Ubuntu, not KUbuntu).– OlliMar 19, 2011 at 13:31
6@Olli; it doesn't work, you need the X server to be inactive for X -configure to run– JRGJun 5, 2011 at 0:46
18Josh G: If you are already running X, just say
X :1 -configure. You have to open the X server on its own display port; if you already have an X server running, the default port of :0 will fail, so you have to specify display :x (where x is the first available display; in most cases 1). Mar 21, 2012 at 18:45
8When running X :1 -configure I have the error : Number of created screens does not match number of detected devices. Configuration failed. ddxSigGiveUp: Closing log Server terminated with error (2). Closing log file.– chmikeFeb 4, 2013 at 14:37
The configurations files are at
Check the current manual.
If you create a xorg.conf file the configurations of this file will prevail.
Also check this answer.
Usually, you don't need the
xorg.conf any more.
If you need to configure some devices anyway, you can do so by placing a file in the
/usr/lib/X11/xorg.conf.d/ (Ubuntu 10.04) or
/usr/share/X11/xorg.conf.d/ (since Ubuntu 10.10). There are some files in this directory already.
You can find more information on xorg.conf.d (in german, but the configuration files are in english of course). What is important is that the filenames should start with a two-digit number greater than 10.
Another guide - in english - is on x org archive. It's still using /usr/lib but it's good.
1Good point and the rigth way to go. The Arch Wiki also has more on this too (wiki.archlinux.org/index.php/Xorg#Display_Size_and_DPI) though their X server is configured to use /etc/X11/xorg.conf.d/ which makes more sense to me. Dec 16, 2011 at 20:35
1In Ubuntu, user-added Xorg options should also go into
/etc/X11/xorg.conf.d/files. You'll have to create that directory first, but it works, and is actually mentioned in Ubuntu's
/usr/share/X11/xorg.conf.d/*files.– taniusFeb 25, 2015 at 3:45
1So many upvotes, but while this answer will work, it is still incorrect, IMHO. The distribution places its X configuration files in
/usr/lib/X11/xorg.conf.d, but per the Filesystem Hierarchy Standard, "/usr is [for] shareable, read-only data.... Any information that is host-specific or varies with time is stored elsewhere." To override the system config, the host configuration should be in
/etc/X11/xorg.conf.das in the accepted answer and @tanius comment above. Jun 9, 2022 at 21:50
cookiecaper's suggestion to use
sudo X :1 -configure
worked for me - right from the desktop! It did finally error-out, but not before providing a nice new xorg.conf.new in my Home directory. Thanks cc! All the other suggestions I had tried failed to produce a file.
Oh, by the way,
in the terminal will provide a bunch of useful, and up to date, info (a bit terse, perhaps) on editing the xorg.conf file.
X -config /root/xorg.conf.newAug 20, 2015 at 22:35
1It removed my second monitor from my PC. No easy fix for that one, so I guess I have to reinstall ubuntu. Nice one.– SimonAug 16, 2016 at 10:12
2@Simon seriously? Did you try to just undo what you did? (ie, remove the /etc/X11/xorg.conf file?) Read desgua's answer, it explains how the newly created xorg.conf will override all other settings for XOrg. Oct 23, 2016 at 5:18
This works fine for me with Nvidia Optimus (Bumblebee) without any special configuration, just the defaults:
#!/bin/bash # # Source: https://bbs.archlinux.org/viewtopic.php?id=140315 # r=`zenity --width 400 --height 250 --title "Display setup" --text "Choose display mode:" --list --column "Modes" "Internal" "External" "Clone" "Extended"` case "$r" in Internal) xrandr --output LVDS1 --auto \ --output VGA1 --off ;; External) xrandr --output LVDS1 --off \ --output VGA1 --auto ;; Clone) xrandr --output LVDS1 --auto \ --output VGA1 --auto --same-as LVDS1 ;; Extended) xrandr --output LVDS1 --auto --primary \ --output VGA1 --auto --left-of LVDS1 ;; esac
The monitors LVDS1 and VGA1 are defined in ~/.config/monitors.xml. For more information about monitors.xml take a look at http://www.sudo-juice.com/dual-monitor-settings-in-ubuntu/.
<monitors version="1"> <configuration> <clone>no</clone> <output name="LVDS1"> <vendor>AUO</vendor> <product>0x213c</product> <serial>0x00000000</serial> <width>1366</width> <height>768</height> <rate>60</rate> <x>1280</x> <y>256</y> <rotation>normal</rotation> <reflect_x>no</reflect_x> <reflect_y>no</reflect_y> <primary>yes</primary> </output> <output name="VGA1"> <vendor>GSM</vendor> <product>0x43ff</product> <serial>0x00035928</serial> <width>1280</width> <height>1024</height> <rate>60</rate> <x>0</x> <y>0</y> <rotation>normal</rotation> <reflect_x>no</reflect_x> <reflect_y>no</reflect_y> <primary>no</primary> </output> <output name="HDMI1"> </output> <output name="DP1"> </output> </configuration> </monitors>
Yeah for most free graphics drivers, recent releases of Ubuntu haven't required a xorg.conf file. You can generate one pretty easily though:
sudo Xorg -configure
For lost amd users: Please note that amd drivers provide a tool to generate xorg.conf
aticonfigis proprietary; it does not install with
xserver-xorg-video-ati. AMD/ATI users can use
xrandrto configure displays. Aug 20, 2015 at 22:45
For users running Ubuntu 19.10, I can confirm that adding a configuration file by booting into recovery, selecting root shell, then running:
cp /root/xorg.conf.new /etc/X11/xorg.conf
will both allow you to edit the configuration file, and fixes the common dual-monitor mouse flickering issue.