Alyosha2001 @JTL I took a video, would be grateful if you could take a peak. I don't think it's PWM since if I decrease the brightness from 100, PWM is very obvious. There still looks like some type of flicker going from left to right.
But, when I attach this laptop to a Dell U3417w, even with Ditherig installed, I see no banding. Perhaps because this is an expensive monitor and actually has 8-bit colors. However I still get eye strain with it. I'd be fine with eye strain from the laptop if I could get none with the Dell monitor.
Here's my video: https://drive.google.com/file/d/18aKec17gTa_S5AgSUavvD3NycSijj75a/view
I'd consider getting my company to use my old Thinkpad T430s and image it, since it gives me no eye strain, but it doesn't support the resolution of the Dell monitor afaik.
I don't think I'm sensitive to PWM since I can use a Galaxy S5 (AMOLED screen with PWM) fine, but, I have issues with Macbook Pro (no PWM); perhaps PWM is not made equal (some is worse than others).
Thanks for all your help. Nice to know I'm not alone here.