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brad
Asked: 2017-03-28 03:56:04 +0800 CST

How to create an xorg.conf in Ubuntu 16.04 to prevent 4K resolution being used

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I have an Ubuntu machine that I use as a dedicated Kodi device. It has built in Intel Graphics.

I recently bought a new 4K TV which is great except I pass the HDMI signal through an AV receiver that cannot cope with a 4K signal. If I change the resolution in Ubuntu to 1920x1080 (which is all I need for Kodi) it has a nasty habit of reverting to 4K on reboots and if the TV is switched off and on again.

I have tried a few xrandr scripts on startup but nothing has been 100% reliable in preventing the switch to 4K. Reading around it sounds like an xorg.conf file would be the best way to manage this situation but I have struggled to generate one.

If I go to a console screen ctrl + alt+f1 and shut down unity 

sudo service stop lightdm

I am not able to then generate an xorg.conf file. If I run sudo X -configure I get the following;

X.Org X Server 1.18.4
Release Date: 2016-07-19
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.4.0-59-generic x86_64 Ubuntu
Current Operating System: Linux kodi 4.8.0-36-generic #36~16.04.1-Ubuntu SMP Sun Feb 5 09:39:57 UTC 2017 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.8.0-36-generic root=UUID=2285a6a6-3668-451f-a779-9451f3880ce7 ro quiet splash vt.handoff=7
Build Date: 26 January 2017  12:26:18AM
xorg-server 2:1.18.4-1ubuntu6.1~16.04.1 (For technical support please see http://www.ubuntu.com/support) 
Current version of pixman: 0.33.6
    Before reporting problems, check http://wiki.x.org
    to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
    (++) from command line, (!!) notice, (II) informational,
    (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Mon Mar 27 22:54:03 2017
List of video drivers:
    amdgpu
    ati
    intel
    nouveau
    qxl
    vmware
    fbdev
    vesa
    modesetting
    radeon
No devices to configure.  Configuration failed.
(EE) Server terminated with error (2). Closing log file.

I'm stuck at this point before even trying to wrangle the xorg.conf file into shape to get what I want done. Any helpful clues as to what I'm doing wrong?

xorg

0 Answers