diogenespolanco / l5p-keyboard-rgb

Cross platform software to control the lighting of the 4 zone keyboard included in the 2020 and 2021 lineup of the Lenovo Legion laptops. Works on Windows and Linux.

Preview

Index

• Download
• Available effects
• Usage
• Compatibility
• Building from source
  • Using cargo-make
  • Building manually

Download

⚠️ Use at your own risk, the developer is not responsible for any damages that may arise as a result of using this program.

Builds will be periodically uploaded to the releases tab.

You may also download precompiled versions from here (requires github account) by clicking the latest entry with a ✅ and going under the "artifacts" section.

Available effects

All stock effects: Static, Breath, Smooth, LeftWave, RightWave.

Custon effects:

• Lightning: Adds a little spark.
• AmbientLight: Reacts to content on your screen.
• Smooth(Left/Right)Wave: An implementation of the classic wave effect.
• (Left/Right)Swipe: Transitions the selected colors from side to side, useful for custom waves.
• Disco: A portable dance floor!

Usage

ℹ️ Note

If you are using the program on Linux, you'll need to run the program as root.

With GUI

Execute the file by double-clicking on it or running it from a console without arguments.

Via the command line

Usage:

$ legion-kb-rgb [OPTIONS] [SUBCOMMAND]

Examples:

• Getting the help prompt

$ legion-kb-rgb --help

• Setting the keyboard to red

$ legion-kb-rgb Static 255,0,0,255,0,0,255,0,0,255,0,0

• Using the SmoothLeftWave with speed 4 and brightness at high

$ legion-kb-rgb -s 4 -b 2 SmoothLeftWave

Compatibility

This program has been tested to work on the 4 zone keyboard of the Legion 5 2020, Legion 5 2021 and Legion 5 Pro models on both Windows and Linux.

"How about X model"

• Legion 7(i): Won't work, the backlight on these is per-key and uses a different way of communicating.
• Any variant with a white backlight: Havent figured out how to talk to this one yet, but given the limited number of states (off, low, high) there's not many effects I'd be able to add anyways.

Building from source

Prequisites

• Rust
• Git
• On Linux, you'll need additional dependencies:

Ubuntu

$ sudo apt-get update && sudo apt-get install -y libpango1.0-dev libx11-dev libxext-dev libxft-dev libxinerama-dev libxcursor-dev libxrender-dev libxfixes-dev libudev-dev nasm libxcb-randr0-dev libusb-1.0-0-dev libdbus-1-dev

EndeavourOS (Arch Linux)

$ sudo pacman -S nasm cmake

Using cargo-make

Works on both Windows and Linux.

• Install cargo-make

$ cargo install cargo-make

• Clone the repository

$ git clone https://github.com/4JX/L5P-Keyboard-RGB.git

• Build the project

$ cd L5P-Keyboard-RGB/
$ cargo make build
# Or
$ cargo make build-release

Building manually

• Download and bootstrap VCPKG
  • You'll need to set an enviorement variable called VCPKG_INSTALLATION_ROOT pointing to the directory where you downloaded and bootstrapped VCPKG.

Windows

• Download the necessary dependencies

> vcpkg update && vcpkg install libvpx:x64-windows-static libyuv:x64-windows-static

• Clone the repository

> git clone https://github.com/4JX/L5P-Keyboard-RGB.git

• Build the project

> cd L5P-Keyboard-RGB/
> cargo build --release

Linux

• Download the necessary dependencies

$ vcpkg update && vcpkg install libvpx libyuv

• Clone the repository

$ git clone https://github.com/4JX/L5P-Keyboard-RGB.git

• Build the project

$ cd L5P-Keyboard-RGB/
$ cargo build --release

Crashes, freezes, etc

I cannot guarantee this solution will work for anyone but myself. That being said feel free to open an issue if you encounter any of these problems on the issues tab.

---

Thanks to legendk95#0574 (272711294338072577) over at discord for initially reverse engineering the way to talk to the keyboard.