When the Fail0verflow Team was developing their PS4-Linux port at the time we just had the original Ps4 models. As we have seen the PlayStation 4 mature with newer Ps4 Slim and Ps4 Pro models released, along with recent 4.xx exploits for those models. There was a need to add full support for those models and ps4 developer eeply has provided now provided those models with Video-Out Support, so that should make things a bit easier to use.
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PS4 Linux - Now Supporting SLIM & PRO Models w/ Video-Out