@Spectre660
Did a quick test with DVI and a 1280x1024 monitor. This setup works fine. Screenmode change is solved in that setup.
Unfortunately my uwqhd monitor only supports hdmi and dp.
Edit: Correction, screenmode change is fine. No loss of output signal anymore. But the issue when changing the monitor settings in the screenmode pref still result in that weird cache coherency error output.
FYI:
The RX560 consumes less than 75W under load.
The R9 270X consumes up to 240W under load.
Todo: This error occurs after a warm reset. I have to check if a warm reset always results in this cache coherency error.
Edited by geennaam on 2021/4/1 14:54:24