Lightning

Lightning is a desktop messenger for Matrix, the open network for secure,
decentralised communication. It is written in C++ and Qt 6 and uses the
official Matrix Rust SDK for networking and end-to-end encryption.

Features include several accounts at once, Spaces, rooms and threads,
end-to-end encrypted rooms with device verification and key backup, a local
search index that never leaves the computer, and group voice calls and
screen sharing built on GStreamer.

Hardware graphics come from the mesa-2604 content snap. If it is not
connected automatically, run:

sudo snap install mesa-2604
sudo snap connect lightning-matrix:gpu-2604 mesa-2604:gpu-2604

Calls also need the microphone and camera interfaces:

sudo snap connect lightning-matrix:audio-record
sudo snap connect lightning-matrix:camera