nvidia, i swear most of the issues i experience are nvidia related in some way yeah i know using a GTX 1080 with a i7 12700k isn't like the best idea but when given the options of use said gpu and get reasonable framerates with the games im playing (but get massive headaches when something related to the proprietary linux driver eventually breaks, and it does) or use the igpu and get unplayable framerates (or low res) or unnecessarily buy a newer gpu that isn't that big of a jump in performance for me to justify the price I'm sticking with dealing with nvidia
apps like https://play.google.com/store/apps/details?id=com.parseus.codecinfo (https://apt.izzysoft.de/fdroid/index/apk/com.parseus.codecinfo) show whether or not you've got it, on my samsung galaxy note 20 ultra I've got software only :(