I am experiencing the above mentioned problem with the AMD video driver for the VEGA 11 on my 3400g cpu.
As long as i use the windows default driver everything works fine. When I install ANY driver from AMD, my screen starts going black. The computer will still work, but the screen goes black for 5-10 sec and then come back for 1 sec- 1 minute and then go black again. Sometimes it doesnt come back and i have to reset via the reset button. The PC however is still working fine, as my music etc. keeps on playing.
I also noticed that when the AMD driver is installed, the problem only happens through HDMI.
When I use Displayport everything works fine.
I will test the pc on another monitor tomorrow to let you know if the problem is related to my screen.
Are there maybe any workarounds that I am unaware of?
Thanks in advance for your help!
PS: Freesync is turned off
Driver versions used
CPU: Ryzen 3400G
Motherboard: ASRock Fatal1ty B450 Gaming-ITX/ac
Memory: 8GB Crucial DDR4 (CT8G4DFD8213)
PSU: Tagan 700 watt PSU
Monitor: Dell u4919dw 49 inch curved screen with resolution 5120x1440