

My best guess is that it’s not a Flatpak permissions issue as others are claiming; the software is just trying to use your iGPU (which is usually crappy) instead of your dGPU.
Try taking whatever command you use to start the program and tacking DRI_PRIME=1 on the front. This has often worked for me on applications regardless of whether they’re native or Flatpak.








I like using this on my desktop, but it’s way too easy to trigger this by accident on a laptop, so I disable it on there.