

Replying to your comment again to say the cable worked. I could buy this exact cable, and my OpenSUSE Leap/KDE computer now does indeed work with 4k60hz on my TV.
Sadly, the processor isn’t really up to the task. But it was a bit of a shot in the dark anyway, I pretty much just hoped it’d work. But 1080p does do well, and on YouTube I generally watch 1080p.
I’ll try xfce next to see how that runs.
Did we?