Have you turned off the auto-volume function in the settings? even if it was turned off ? so in that case turn on the auto volume , turn off the monitor , turn on the monitor and turn off the auto volume again ? at me it helped
after hdmi cable fall off problems with waking up the monitor , on 1 hdmi-microhdmi cable there was a problem with random black screens , whose solution , was to connect simultaneously via DP cable and then disable DP in the settings of multiple screens in nvidia drivers , but for a week now I'm testing HDMI 8k cable from amazon 2 meter + HDMI-MICROHDMI adapter and only HDMI connection is enough , so I suspect that black screens caused weak previous cable
currently such a set up and hdmi works ok , except 12bit/175hz , 12bit works ok with 120hz , only why include it when the panel is 10 bit ?
VMOJO 8k Micro HDMI-stekker naar standaard HDMI-bus adapter 2.1 versie adapter voor camera, laptop, ultraHD, 3D, converterondersteuning 8K @60Hz, 4K @144Hz (2 stuks) : Amazon.nl: Elektronica
www.amazon.nl
before i use this :