I struggle to find to find on which GPU is Wayland running

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1

I have a laptop with 2 GPUs, it’s a Nvidia Optimus hybrid graphics system. I struggle to find on which of those GPUs Wayland (KDE Plasma) is running. Tool wayland-info spits out lots of detailed technical information. Not very user friendly. I’m not sure what I should look there for to get my answer.

The Wayland tab under Info Center just displays content of wayland-info so, not extra help there.

Please, KWin/Plasma devs, if you read this, please could you add extra information under Info Center showing on which GPU is Wayland running?

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Thank you

2

I think you can find it in OpenGL (GLX). Scroll a bit down, you will see Device: driver name (e.g. in my case its Device: Mesa Intel...), under Extended renderer info section.
ETA: You can also use the search at the top. Just search for Device:.

3

For what it’s worth - as a general rule, across most modern distributions and desktop environments, you can open a terminal window and run glxinfo | grep OpenGL. The first couple lines there will tell you what’s actively rendering:

On my NVIDIA-only desktop:

$ glxinfo | grep OpenGL
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: NVIDIA GeForce RTX 4070 SUPER/PCIe/SSE2

On the kids’ hybrid laptop:

$ glxinfo | grep OpenGL
OpenGL vendor string: AMD
OpenGL renderer string: AMD Radeon Graphics (radeonsi, renoir, LLVM 19.1.0, DRM 3.60, 6.12.15-200.fc41.x86_64)

And on that same laptop, but prefixed with environment variables to force running on the NVIDIA card:

$ __NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia glxinfo | grep OpenGL
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: NVIDIA GeForce GTX 1650/PCIe/SSE2