--- Comment #2 from David Koppelman <> ---
When a system is set up for what Nvidia calls prime render offload,
applications by default will use the integrated GPU. In order to use the
discrete GPU the application has to have certain environment variables set,
usually __NV_PRIME_RENDER_OFFLOAD=1, though others need to be set for Vulkan
applications. For details see Chapter 35 in the Nvidia driver readme:

On my system I only want to use the discrete GPU for graphics intensive
applications. I do that by starting these applications with a script that sets
the environment variables before launching the application or by appropriate
.gdbinit settings (if I'm debugging one of those applications).

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