Arch Linux: Install the AUR Package (or the -git version)
Debian/Ubuntu/Derevatives: Download a .deb from releases.

It is only available on Debian 12+ and Ubuntu 22.04+ as older versions don't ship gtk4.
Fedora: an rpm is available in releases.
Otherwise, build from source:

Why is there no AppImage/Flatpak/other universal format? See here.

Configuration

There is a configuration file available in /etc/lact/config.yaml. Most of the settings are accessible through the GUI, but some of them may be useful to be edited manually (like admin_groups to specify who has access to the daemon)

Building from source

Dependencies:

rust
gtk4
pkg-config
make
hwdata

Steps:

git clone https://github.com/ilya-zlobintsev/LACT && cd LACT
make
sudo make install

Usage

Enable and start the service (otherwise you won't be able to change any settings):

sudo systemctl enable --now lactd

You can now use the application.

CLI

There is also a cli available.

Getting basic information:

lact cli info

Example output:

GPU Model: Radeon RX 570 Pulse 4GB
GPU Vendor: Advanced Micro Devices, Inc. [AMD/ATI]
Driver in use: amdgpu
VBIOS Version: 113-1E3871U-O4C
VRAM Size: 4096
Link Speed: 8.0 GT/s PCIe

Getting current GPU stats:

lact cli metrics

Example output:

VRAM Usage: 545/4096MiB
Temperature: 46°C
Fan Speed: 785/3200RPM
GPU Clock: 783MHz
GPU Voltage: 0.975V
VRAM Clock: 1750MHz
Power Usage: 38/155W

Showing the current fan curve:

lact cli curve status

Example output:

Fan curve:
20C°: 0%
40C°: 0%
60C°: 50%
80C°: 88%
100C°: 100%

Reporting issues

When reporting issues, please include your system info and GPU model.

If there's a crash, run lact gui from the command line to get logs, or use journalctl -u lactd to see if the daemon crashed.

Alternatives

If LACT doesn't do what you want, make sure to check out CoreCtrl.