- When it does need to composite with the GPU, it does so with async Vulkan compute, meaning you get to see your frame quick even if the game already has the GPU busy with the next frame.
- Because the game is running in its own personal Xwayland sandbox desktop, it can't interfere with your desktop and your desktop can't interfere with it.
- You can spoof a virtual screen with a desired resolution and refresh rate as the only thing the game sees, and control/resize the output as needed. This can be useful in exotic display configurations like ultrawide or multi-monitor setups that involve rotation.
It runs on Mesa + AMD or Intel, and could be made to run on other Mesa/DRM drivers with minimal work. AMD requires Mesa 20.3+, Intel requires Mesa 21.2+. Can support NVIDIA if/when they support atomic KMS + accelerated Xwayland + Vulkan DMA-BUF extensions.
If running RadeonSI clients with older cards (GFX8 and below), currently have to set `R600_DEBUG=nodcc`, or corruption will be observed until the stack picks up DRM modifiers support.
*`-W`, `-H`: set the resolution used by gamescope. Resizing the gamescope window will update these settings. Ignored in embedded mode. If `-H` is specified but `-W` isn't, a 16:9 aspect ratio is assumed. Defaults to 1280×720.
*`-w`, `-h`: set the resolution used by the game. If `-h` is specified but `-w` isn't, a 16:9 aspect ratio is assumed. Defaults to the values specified in `-W` and `-H`.