Case study

legion-gpu-rgb: reconstructing Lenovo GPU lighting control

legion-gpu-rgb reconstructs RGB lighting control for a Lenovo OEM RTX 5070 Ti by tracing its DDC-side NvAPI I2C transactions. It documents the controller's register writes and supplies a Python controller, an OpenRGB plugin and a patch that exposes the DDC bus to OpenRGB.

Targets: Protocol
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06
Evidence class: C2 code & docs, no demo or download

Stars: 2
Last commit: 2026-09-15
Language: C++
License (GitHub): GPL-2.0

GitHub data as of 2026-11-10

Copy as Markdown View JSON Cite

Evidence

Observed: Code, documentation and a download method observed; no demo found.
Checked: 2026-11-08

How evidence classes are assigned

Requirements & limits

Prerequisites: The documented hardware is the Lenovo OEM RTX 5070 Ti with PCI ID 10DE:2C05 and subsystem 17AA:C773; other cards are untested.
Prerequisites: The standalone tool requires Python 3 and an NVIDIA driver; the plugin targets OpenRGB 1.0rc3 or 1.0rc3.1, plugin API 4 and Qt 5.15.0.
Limits: Only static effect 0x01 is implemented; the author reports that a colour update takes about 555 ms.
License: GPL-2.0-or-later licence.

Cite

BibTeX

@misc{legion-gpu-rgb-case,
  title = {{legion-gpu-rgb: reconstructing Lenovo GPU lighting control}},
  howpublished = {\url{https://github.com/violentbunny/legion-gpu-rgb}},
  url = {https://github.com/violentbunny/legion-gpu-rgb},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/legion-gpu-rgb-case/}}
}

Plain text

legion-gpu-rgb: reconstructing Lenovo GPU lighting control. https://github.com/violentbunny/legion-gpu-rgb (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/legion-gpu-rgb-case/

Useful? Star Awesome REA on GitHub2.4k

About this entry

The description was reviewed against primary sources.

Report an outdated entry Suggest a translation fix

Primary sources

docs/protocol.md GitHub · violentbunny/legion-gpu-rgb · Revision 849d011
README.md GitHub · violentbunny/legion-gpu-rgb · Revision 849d011