Linux monitor control

DDCcontrol

Control brightness, contrast, color levels and other monitor settings from the command line or a GTK interface.

Current releases

Program and profiles, kept in sync

DDCcontrol2026-09-28

Building now requires Rust and Cargo 1.77 or newer.
New direct Rust dependencies are ciborium 0.2.2 and sha2 0.10. Existing dependencies include encoding_rs 0.8, libc 0.2, and roxmltree 0.20. Offline builds must provide these crates through distribution packages or use the vendored source archive.
make install now installs the new ddccontrol-scanmonitor executable and its ddccontrol-scanmonitor(1) manual page. These should normally be included in the main ddccontrol package. The scanner uses the existing ddccontrol-db data and accesses /dev/i2c-* directly; it has no D-Bus dependency.
ddccontrol-dbgen is a new build-time database producer and validator. It is not installed by make install and is not required on end-user systems. The release publishes statically linked binaries for x86_64-unknown-linux-musl and aarch64-unknown-linux-musl, with separate SHA-256 checksum files.
Database packagers can use ddccontrol-dbgen to generate ddccontrol-db.cbor and ddccontrol-db.snapshot. These files must be generated from the same XML source snapshot and installed together. XML-only database packages remain supported.
There is no libddccontrol SONAME bump compared with 3.3.0 and no new explicit shared-library runtime dependency. Builds remain supported on Debian architectures including ppc64el, riscv64, and s390x.

Monitor database2026-09-28

docs(db): define the CBOR contract and reference fixtures by @larstobi in https://github.com/ddccontrol/ddccontrol-db/pull/440
build(db): validate CBOR with the pinned Rust producer by @larstobi in https://github.com/ddccontrol/ddccontrol-db/pull/441
build(db): distribute CBOR alongside XML and translations by @larstobi in https://github.com/ddccontrol/ddccontrol-db/pull/439
feat: add conservative Sceptre C275B-1858RN support by @larstobi in https://github.com/ddccontrol/ddccontrol-db/pull/447
feat: add Lenovo ThinkVision P40w-20 support by @larstobi in https://github.com/ddccontrol/ddccontrol-db/pull/450
feat: add conservative AOC Q27G42XE monitor profile by @larstobi in https://github.com/ddccontrol/ddccontrol-db/pull/449
feat: add Acer EI342CKR monitor support by @larstobi in https://github.com/ddccontrol/ddccontrol-db/pull/448
build(db): use ddccontrol 3.4.0 dbgen by @larstobi in https://github.com/ddccontrol/ddccontrol-db/pull/453

Full Changelog: https://github.com/ddccontrol/ddccontrol-db/compare/20260922...20260928

Two interfaces

gddccontrol provides a GTK interface. ddccontrol exposes the same monitor controls for terminals, scripts and automation.

Shell

$ sudo ddccontrol -p
$ sudo ddccontrol -r 0x10 \
    -w 75 dev:/dev/i2c-4

474

monitor and reusable profiles in database release 20260928

Search the generated profile index, inspect the exact XML source, or contribute support for another display.