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GNOME 3.36 Bringing Better Multi-GPU Handling With Switcheroo-Control, NVIDIA Support
GNOME developer Bastien Nocera has been cleaning up the switcheroo-control code so it doesn't rely upon the Linux kernel's VGA_Switcheroo, support more than two GPUs, and better handling of the main/secondary handling. For end-users the big addition is support for the NVIDIA proprietary driver.
Nocera and others have cleaned up switcheroo-control and exposing an improved D-Bus API for handling this better GPU switching / launching on separate GPU behavior and will be part of GNOME 3.36.
More details on the forthcoming GNOME switcheroo-control improvements via this blog post.