https://bugzilla.kernel.org/show_bug.cgi?id=202445
--- Comment #33 from Clément Guérin (libcg@protonmail.com) --- It looks like the luminance flickering situation is much improved when using linux 5.3 with this "LFC behaviour" patch applied: https://lists.freedesktop.org/archives/amd-gfx/2019-September/039856.html
The easiest way to reproduce the problem is to play Kerbal Space Program, open the Vehicle Assembly Building and then hover the mouse over the parts selector, on the left of this screenshot: https://www.kproplab.org/wp-content/uploads/2018/09/eex-1.png