Hello there !
So as the title says, I'm experiencing random, 1 second long blackscreens with my iiyama G-Master G2530HSU as soon as I enable Freesync (connected in DisplayPort).
I would like to point out that this problem has been around for at least 6 months
CPU: Ryzen 5 1600
GPU: R9 Fury tri x (sapphire)
RAM: 16 GB DDR4-3133