ddcutil ☆

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Description:
Control monitor settings using DDC/CI and USB

Type: Formula | Latest Version: 2.2.3@0 | Tracked Since: Dec 17, 2025

Links: Homepage | formulae.brew.sh

Category: System utilities

Tags: monitor ddc-ci hardware cli display system-utility

Install: brew install ddcutil

About:
ddcutil is a command-line tool for interacting with monitors that support the DDC/CI (Display Data Channel Command Interface) protocol. It allows users to read and write Virtual Control Panel (VCP) feature values, enabling direct control over hardware settings like brightness, contrast, and input source selection. This utility is invaluable for scripting monitor configurations and managing multi-monitor setups programmatically.

Key Features:

Read and write VCP feature codes to adjust monitor settings
Detect and manage multiple connected monitors
Support for both DDC/CI via I2C and USB-connected displays
Comprehensive logging and debugging capabilities
Can be used in scripts for automated display configuration

Use Cases:

Automating brightness adjustments based on ambient light sensors or time of day
Switching monitor inputs (e.g., HDMI 1 to DisplayPort) via command line
Creating custom profiles for different tasks (gaming, coding, media consumption)
Auditing and reporting monitor capabilities and status in a data center or office environment

Alternatives:

ddcui – A graphical user interface (GUI) for ddcutil, providing a point-and-click interface instead of a command-line one.
brightnessctl – Controls software brightness (e.g., on laptop screens) via the kernel's backlight interface, not hardware DDC/CI.

License: GPL-2.0-or-later

Dependencies: glib, i2c-tools, jansson, kmod, libdrm, libusb, libx11, libxext, libxrandr, systemd

Bottles available for: arm64_linux, x86_64_linux

Version History

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