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Flatpack apps performance on Linux Mint
(lemmy.ca)
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this post was submitted on 03 Jan 2026
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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=1on the front. This has often worked for me on applications regardless of whether they're native or Flatpak.