Partial rendiging error since 1.2

[dol]

Originally Posted by Sparxy

Use the XFCE compositor (or another one) to perform full-screen repaints. (though this may be taxing on the CPU with DisplayLink).

You can also mitigate this issue by having the compositor determine which areas need repainting.
i.e. I use compton with --glx-use-copysubbuffermesa.

Thx. I did disable the built in composite for some reason. I enabled the composite and the error went away.
I watched https://www.youtube.com/watch?v=3esPpe-fclI to understand the reason to run a composite.