I'm trying to setup Xdmx, which isn't easy. I'm having issues with xinerama and differing colour depths, which can be rectified by change xorg.conf on each of the machines. Of course, these days xorg.conf doesn't exist because the drivers do all the hard work for us.

So, what should a default xorg.conf look like?

  • This is a bit of a generic Xorg question. Possibly better suited to SuperUser.
    – Jivings
    Jul 5, 2012 at 12:45
  • 1
    I disagree, the Pi is a specific setup. Jul 5, 2012 at 12:54
  • Nah, the xorg on the Pi wont look any different to any other system for Xdmx.
    – Jivings
    Jul 5, 2012 at 12:59
  • Course it will - xorg.conf is specific to the RPi - it tells the local Xserverhow to start. Jul 5, 2012 at 15:28
  • Let us talk about this in chat later. I'm quite sure it isn't Pi specific.
    – Jivings
    Jul 5, 2012 at 16:03

1 Answer 1


I've added /etc/X11/xorg.conf.d/10-monitors.conf, which seems to output the same logs as before, but allows customisation. I had problems with setting 24-bit depth though.

Section "Device"
    Identifier "main"
    Driver     "fbdev"

Section "Monitor"
    Identifier "Monitor0"
    Option "DPMS"

Section "Screen"
    Identifier "Screen0"
    Device     "main"
    Monitor    "Monitor0"
    DefaultDepth 16
    SubSection "Display"
            Depth 16
  • I also had trouble with depth and HDMI. Use config.txt to set the HDMI output.
    – Jivings
    Jul 5, 2012 at 19:51
  • 1
    I love you Alex, for replying to your own post with what worked.
    – user316054
    May 14, 2017 at 19:55

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