Solution: Seems to be a known issue with X11 on intel graphics, following This guide from the Arch Wiki seems to fix it.
So I’ve been using my laptop with Manjaro for a few days and I’ve noticed about 1/8th down the screen from the top a horizontal line appears where that above and below it are slightly out of sync (the top is on one frame where the bottom is on another). This issue does not seem to effect text but does effect video from VLC, MPV, Youtube on Firefox, etc. I’m not sure if its a driver or hardware issue. Please advise.
2 x 8 GB DDR4-3200
lspci reports kernel driver as “i915”
Display is set at 2256x1504@60hz
EDIT 10/30/21: In case this is a hardware issue, my laptop was in batch 4, perhaps others in this batch have the same issue?
Yeah screen tearing in X takes some tweaking to fix.
Do a bit of googling on Intel, X11, and screen tearing. You’ll want to enable the TearFree option in your xorg config as a starting point. I’ll bet the Arch wiki has material on this topic (though I haven’t looked myself).
In Wayland this should be a non-issue, but you get other issues as a consequence…
Thanks @Brett_Kosinski for the tip
I found the arch wiki had an entry for tearing under troubleshooting, you can find it here
it seems to have fixed my issue, I’ll give an update in a while after I’ve tested for a little longer.