It happened to me on Ubuntu. VLC and Jellyfin would both get screen tearing. Games were fine though. After some research, I found that turning on ‘force full composition pipeline’ in the Nvidia settings fixed it. Still too new to understand the how and why.

I just made the jump to Ubuntu. You don’t need a Steam Deck or Steam OS. Steam works just as well on any Linux OS. Proton is the real star because it deals with the compatibility issues so well.

I just set up an Ubuntu dual boot last week. Valve has really made Linux gaming easy. Just one checkbox to enable Steamplay. I don’t see myself going back to Windows any time soon. Good luck with Mint.