# rockowitz/ddcutil

Control monitor settings using DDC/CI and USB

Repository: https://github.com/rockowitz/ddcutil
Canonical: https://ross.abutalabs.com/products/ddcutil
Homepage: http://www.ddcutil.com
Language: C
License: GPL-2.0
License Family: copyleft
Topics: monitor, mccs, ddc, ddc-ci, calibration
Last push: 2026-08-26T16:10:19+00:00

## Health v2 (maintenance only)
Score: 89/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 71, longevity 100
- inputs: {"age_days": 3909, "days_push": 7, "days_rel": 116, "gap_med": 61.5, "n_releases_24m": 7}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1385, forks 73 (observed 2026-08-28T04:04:34.876120+00:00)

## What it is
ddcutil is a Linux command-line tool and shared library (libddcutil) for querying and changing monitor settings such as brightness, color levels, and input source via DDC/CI over I2C, with USB support for certain monitors. It is commonly used for color profile management, saving and restoring monitor color settings around calibration.

## Use cases
- adjust monitor brightness from the command line
- switch monitor input source without pressing buttons
- save and restore monitor color settings for calibration workflows
- query monitor capabilities and VCP features
- script monitor settings changes on Linux
- control external monitors on Wayland or X11

## When to choose
- you need to control external monitor settings on Linux programmatically or from the shell
- you are building color profile or calibration management software
- you want a stable shared library for display control, e.g. for desktop environments like KDE

## When to avoid
- you need to control laptop internal displays, which ddcutil does not support
- you are on Windows or macOS, as ddcutil is Linux-only
- your monitor does not support DDC/CI or MCCS

## Facets
- artifact type: cli-tool
- maturity: active
- function: cli, developer-tools, configuration-management
- domain: hardware, operating-systems, developer-tools
- platform: cli, c
- tags: ddc-ci, monitor-control, mccs, i2c, display-brightness, monitor-calibration, libddcutil, automation, linux

## Member repositories
- rockowitz/ddcutil (main) score 89

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:34.876120+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:39:57.729178+00:00, confidence not recorded.
  - readme: https://github.com/rockowitz/ddcutil (fetched 2026-08-28T04:04:34.876120+00:00, sha 66e3ef5ff674)
  - homepage: http://www.ddcutil.com (fetched 2026-08-29T11:55:40.024810+00:00, sha 938ab0dc69e7)
  - site_page: http://www.ddcutil.com/table_features (fetched 2026-08-29T11:55:40.030267+00:00, sha 6ca19ce3da9e)
  - site_page: http://www.ddcutil.com/install_config_main (fetched 2026-08-29T11:55:40.036214+00:00, sha db0a1a299387)
  - site_page: http://www.ddcutil.com/install (fetched 2026-08-29T11:55:40.040492+00:00, sha a8b495a9e07d)
  - site_page: http://www.ddcutil.com/udf (fetched 2026-08-29T11:55:40.033444+00:00, sha fcd0f9adfdd9)
  - site_page: http://www.ddcutil.com/config_steps (fetched 2026-08-29T11:55:40.038160+00:00, sha b6e8b3781f7e)
  - site_page: http://www.ddcutil.com/config (fetched 2026-08-29T11:55:40.042354+00:00, sha 83966e0c69ab)
  - site_page: http://www.ddcutil.com/c_api_224 (fetched 2026-08-29T11:55:40.044285+00:00, sha e43c7e843ea3)
  - site_page: http://www.ddcutil.com/devdoc (fetched 2026-08-29T11:55:40.045972+00:00, sha 9eb263844ac9)
- Data as of 2026-08-30T08:39:29.467469+00:00.