GPU Selection

GpuEnumerator.cs

--list-gpus enumerates the system's DRM render nodes and prints an indexed list of the GPUs GlavaSharp can render on:

Available GPUs (use --gpu <index>):
  [0] AMD (pci id 0x1002:0x73df, driver amdgpu) [card0]
  [1] Intel (pci id 0x8086:0x4680, driver i915) [card1]

Each entry shows the vendor, PCI device ID, kernel driver, and DRM card node backing that index. Pass the index to --gpu <index> to pin rendering to that GPU (useful on hybrid-graphics laptops where the default render node isn't the one you want driving the visualizer). --gpu affects which GPU renders the window/shader pipeline; it's independent of --fft-device gpu, which only controls where the FFT itself runs.