Can ignore my last comment, looks like you've already solved it.
Good info about the video playback with Nvidia, I'll remember that. I normally use VLC for playback and it's been handling everything I've thrown at it.
Thing is SMPlayer doesn't have a boomerang move back when using the mouse wheel to move forward it jumps then moves back likely from to many filters and programs running at once. I used to like VLC but it's become a behemouth in the past few years. In SMPlayer you can ff an entire video to the 25 minute mark in 15 seconds but VLC is jump ahead slide back to it's more like over a minute resisting the user the entire time and mouse clicks can be worse click 10 minutes then jumping back 8 of that.
On Facebook the administrator on the XFCE group said SMPlayer was his go to also since he liked the responsiveness of SMPLayer also and this is the guy that runs the site Fossbytes so he's seen a lot of players. Heck I use SMPlayer for my audio player also and in a folder do ctrl A "select all" then right click and choose enqueue in SMPlayer and it loads the playlist up and plays it in the order it's in Thunar for me.
I have to admit I wish I'd save some cash and just done an Intel 6 or 8 core CPU with onboard video instead. If I'd known Nvidia was using this shitty blob driver setup I would have just skipped AMD altogether.
One great thing is the cards used I paid $200 for are now going for around $500 used and mines still mint never overclocked so I put a $400 price tag on it and then put my 1030 it the case instead, not a gamer so not a sacrifice in any way and a $200 profit so I could trade my motherboard "great for windows" my ryzen 2600 and 64gb ddr4 of ram. Then I could get a nice motherboard ram cpu Intel onboard graphics setup that runs smoother since my old Dell runs smoother than this current setup in linux but AMD is still slacking like a mother fucker on their support and the motherboards are not what I'd call even trying to be linux fully compatible but instead fair on the compatibility side.
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