DDCCONTROL(1)

💅 DDCCONTROL — the manual page, but make it make sense

okay bestie, sit down, hydrate, because we're learning ddccontrol, a lil' General Commands Manual entry (yes it's DDCCONTROL(1), we been knew 👑), and honestly? it's iconic.

---

✨ NAME ✨

ddccontrol — a utility to control monitor parameters via software 🖥️💖

---

🌸 SYNOPSIS 🌸

ddccontrol -p             [-cdfsvS] [-b datadir] [-r ctrl [-w value |-W
value |-t value1,value2]]
ddccontrol dev:/dev/i2c-N [-cdfsvS] [-b datadir] [-r ctrl [-w value |-W
value |-t value1,value2]]

like. look at her. two whole ways to summon her. 💫

---

🦋 DESCRIPTION 🦋

This manual page documents briefly the ddccontrol command. (briefly!! she's mysterious like that 🙈)

ddccontrol is an open source utility which allows controlling monitor parameters via software. She talks to your monitors through userspace I2C using /dev/i2c-* devices. 💅

okay and now the tea, because there's lore: the legacy direct PCI memory access and AMD ADL backends have been removed, and USB-connected DDC/CI displays are not supported yet. so if that's your setup... bestie I'm so sorry, it's giving not yet. 😭

---

💜 OPTIONS 💜

a summary of options is included below. slay, let's go one by one, no skipping, we don't do that here.

• dev — a device specifier, for example: dev:/dev/i2c-0, or a monitor selector string (exact match against the PnP ID, the monitor name shown by -p — which may include the PnP ID in brackets — or the database model name). Use selector to select all matching (DDC/CI-supported) monitors, and selector/N (for example SAM083C/0) to select one match by zero-based index. 🎯
• -p — probe /dev/i2c-* devices to find monitor buses. detective mode fr. 🔍
• -c — query capability.
• -d — query ctrls 0 – 255, except engineering/vendor-specific controls 0xe0 – 0xff unless -f is also used. 🙅♀️ (those are the VIP-only controls, you need the wristband)
• -r — query ctrl.
• -w — value to write to ctrl.
• -W — relatively change ctrl value (+/-). lil nudge, not a full rewrite. ✨
• -t — toggle ctrl value between value1 and value2 (defaults to value1 if current value is neither). flip flop flip flop. 🩴
• -f — force (avoid validity checks and include engineering/vendor-specific controls 0xe0 – 0xff in -d output). she's got the keys to the back room. 🔓
• -s — ask the monitor to save current settings (if supported — no promises, bestie 🫶).
• -S — suppress unsupported-monitor fallback warning. shhh. 🤫
• -v — verbosity (specify more to increase). stack 'em like bracelets. -vvv energy. 💫
• -b — ddccontrol-db directory (if other than /usr/share/ddccontrol-db). 📁

---

🌈 ENVIRONMENT 🌈

• DDCCONTROL_NO_DAEMON — When set to a non-empty value, ddccontrol bypasses the D-Bus daemon and accesses /dev/i2c-* devices directly. This can be useful for testing, debugging, or working around a daemon startup or connection problem. you're going straight to the source, no middleman, no cap. 💅

---

🎀 SEE ALSO 🎀

The program is documented fully in /usr/share/doc/ddccontrol/html/index.html

The project homepage: https://github.com/ddccontrol/ddccontrol 🔗 (go look, she's cute)

---

👑 AUTHOR 👑

ddccontrol was written by Oleg I. Vdovikin and Nicolas Boichat. 💖

Copyright 2004-2005 Oleg I. Vdovikin (oleg@cs.msu.su) Copyright 2004-2006 Nicolas Boichat (nicolas@boichat.ch) Copyright 2004-2026 DDCcontrol authors and contributors (see AUTHORS and CONTRIBUTORS)

This manual page was written by Roberto C. Sanchez <roberto@connexer.com>.

---

fr fr, respect the authors, they carried this whole thing on their backs. 🫶

and that's the whole page, bestie — DDCCONTROL(1), from the General Commands Manual, dated May 28, 2026. no notes, periodt. 💅✨