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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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Yeah it can be confusing; Flatseal makes it easier as it's a GUI way of doing what is otherwise command line with flatpak itself but it still assumes some knowledge about what you're doing and can be a bit of trial and error. The more you expose to the sandbox, the more "native" performance you can achieve but it's at the expense of security.
In Flatseal you can set global options for all apps, or individual apps. For graphics, in the Device section, toggling the option to make the GPU available to the sandboxes may be needed - "GPU Acceleration" in the Device section. That one option can be pretty effective as GPU hardware acceleration is often important, if not essential, for programs like Handbrake (which are video transcoding).