A custom EFI app? Is that like a handrolled Unified Kernel Image with some Proxmox-specific addons in it? How’d you make it?

Awesome…

Care to share the video/code? I actually have something similar (Corsair Scimitar’s macro customizer doesn’t work on Linux

As I was writing this I found a project that deals with Corsair MMO mice on Linux so now I will be going on an egg hunt.