Second monitor keeps on temporarily going black at random

I am also having the same issue. I have swapped video cards, I have fresh installed windows, I have turned off windows managing my drivers so that AMD controls them. I even lowered my refresh rate (which is killing my games) Honestly this is ridiculous. I even got a different monitor and brand new, expensive, gold tipped cables. Switched from DP to HDMI and back again. I have been stressing thinking I need a new mother board, but now I see so many people having the issues, I have to make the educated guess that it's windows. I don't know if I can live with that. I may switch to Linux until they can resolve these issues.

I KNEW IT, I KNEW IT, I KNEW IT.....

Just blacked for a second while scrolling in Firefox :(

Next, enabling hardware acceleration in Firefox.

I think, for me on my system, this is a definitely a Windows 11 issue and a combination of non-standard resolutions such in 1920 x1200 resolution and the fact that on that setting, Windows doesn't allow me to force the refresh rate to a standard 60hz, instead it's auto reading the monitor's default rate of 59.5hz for the second monitor and the other 2 monitors are on 60hz. I have 4 monitors on 2 different PC systems attached with a KVM USB switcher for mouse and keyboard and the monitor in question works fine on the Windows 10 box connection and only has the issue when working from the Windows 11 laptop. BTW, the monitors do not run through the KVM, I manually change inputs through monitor settings. I had this setup for 2 years and was working fine till this week after a new Windows 11 update. I've been Window's 11 for about 6 months and the monitor issue just happened after the new update.

In previous Windows version, you could force the refresh rate of what you wanted but in Windows 11 (Piece of !@$! OS) for the resolution of 1920 x 1200 won't me let change the refresh rate, it's fixed at 59.5hz. I can open the older adapter settings menu and set it to 60hz but it does nothing, stays at 59.5hz on the main display settings page. Furthermore, if I set the resolution to 1920 x 1080 it does allow me to select 60hz as a resh rate and the problem goes away, BUT then my resolution looks terrible on this monitor. This is not a fix, it's a less-than-optimal work around. This is 100% a Windows 11 issue and started from recent update. Win 11 is garbage.

Just a note about 11, they changed too many things for stylistic reasons and didn't realize they gutted functionality on a couple things. For example, the right click is now a mess for functionally. The whole purpose was to have extra options right there for the selection, but the style changes moved or altered a lot of the options for no other reason than to look more modern. It used to have WinZip on it WITH the option to unzip files multiple selected files at once and create the individual file names automatically with 1 click. Now, can't do it on Windows 11, option just gone. It has the option to unzip multiple selected files natively, but it just dumps them all into 1 file does not create the unzipped version of each file named properly. This may sound like a minor annoyance, but this greatly increases my work time when working with 60+ zips like I do. And now this monitor issue after Update. I do NOT like Windows 11 at all, but the company updated to it 6 months ago, so I'm stuck using it.

As it's only one display that is going blank I was assuming that it wasn't related to Windows sleep settings?

It doesnt work, and my extend monitor already have lower resolution.

Actually, a few days ago there is no problem but now it's black.