I have same issue... Tearing is nasty.
There is coming... slowly... a fix. Its called PrimeSync = https://devtalk.nvidia.com/default/topi ... onization/
There is way to enable this to Solus, but I do not have you exact step by step guide for you. Downside this PrimeSync is that some stuff stop working... in my case few games not working anymore. (I have played with PrimeSync in Ubuntu and Fedora... no experiance from Solus).