All Projects → kfix → Ddcctl

kfix / Ddcctl

DDC monitor controls (brightness) for Mac OSX command line

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ddcctl: DDC monitor controls for the OSX command line

Adjust your external monitors' built-in controls from the OSX shell:

  • brightness
  • contrast

And possibly (if your monitor firmware is well implemented):

  • input source
  • built-in speaker volume
  • on/off/standby
  • rgb colors
  • color presets
  • reset

Install

Download Binaries

Head to Releases and from the latest release download ddcctl_binaries.zip archive

Build from Source

  • install Xcode
  • run make

Usage

Run ddcctl -h for some options.
ddcctl.sh is a script I use to control two PC monitors plugged into my Mac Mini.
You can point Alfred, ControlPlane, or Karabiner at it to quickly switch presets.

Input Sources

When setting input source, refer to the table below to determine which value to use.
For example, to set your first display to HDMI: ddcctl -d 1 -i 17.

Input Source Value
VGA-1 1
VGA-2 2
DVI-1 3
DVI-2 4
Composite video 1 5
Composite video 2 6
S-Video-1 7
S-Video-2 8
Tuner-1 9
Tuner-2 10
Tuner-3 11
Component video (YPrPb/YCrCb) 1 12
Component video (YPrPb/YCrCb) 2 13
Component video (YPrPb/YCrCb) 3 14
DisplayPort-1 15
DisplayPort-2 16
HDMI-1 17
HDMI-2 18
USB-C 27

Credits

ddcctl.m sprang from a forum thread on the TonyMac-x86 boards.

DDC.c originated from jontaylor/DDC-CI-Tools-for-OS-X, but was reworked by others on the forums.

A few forks have also backported patches, which is nice 👌.

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