Windows 10: Screen going black when watching videos in fullscreen

Hello, Recently, I tried to boost my performance for a game called Counter Strike 2. When I was doing that, I must have changed some setting in my system that now causes this issue. Whenever I try to watch a video in fullscreen youtube, twitch, downloaded videos in my PC, videos in discord, the screen either goes fully black I just can't see anything or it flashes with a black screen. I've tried watching the fps boost videos back to see what could have caused the issue, but I didn't find anything, that could solve the issue. In case this helps, I currently have 2 monitors, Samsung Odyssey

:)

 

Screen goes black when watching Youtube video Fullscreen

There is a problem, when I watch long videos on youtube 15+ minutes the screen goes black automatically. It is fullscreen, I use Chrome, it should not go into sleep mode but it does.

I don`t want to turn off the sleep mode because it is useful because I can leave my PC suddenly for few hours, and switching between profiles everytime before watching video is annoying. Seems like Windows doesn`t get the media playback task from browser
(and Chrome obviously supports that on Youtube)

 

Black flashing/flickering when going Fullscreen?

Hello,

my problem is that every time I watch a video on Youtube or Discord ect. my screen just flickers black when I go Fullscreen so I always have to exit Fullscreen to be able to watch the video. It also doesn't matter if the video is running or paused its the fact I go into Fullscreen.

I tried restarting my pc but that didn't help, then I tried to see if I had any new Nvidia graphics update but I am already on the newest one..

I think its because of the Nvidia update but I am not sure.. I am on Windows 11 in case that helps.

I don't know if it helps but here are my specs:

GPU: RTX 2080ti

CPU: Ryzen 5 3600

SSD: C - 500GB | E - 1TB

RAM: 2x8 GB Crosshair

Mainboard: MSI X570-A PRO ATX AM4

PSU: 750W Seasonic

 

Black screen when playing video fullscreen in Windows 10

My Laptop has dual graphic card:Intel HD Graphics 530 and GTX 970m and I usually connect an external monitor to it, setting external monitor (noted as Monitor 1) as main monitor. Both monitors are on. But these days I found that when I play video fullscreen on chrome, the monitor will turn to black but audio goes on, ie. my computer cannot render video correctly. I tested several times and got some info:

1. When I set Monitor 2(internal monitor of laptop) as main monitor, the video is ok when fullscreen, no matter which screen you drag the chrome window into.
   
2. When the HD 530 is banned in Device Manager, ie. only GTX 970m working, it also works well.
   
3. I tried disabling Hardware Accleration as some solution instructed but seems this issue remains unsolved.
   
4. Playing video file (.mkv, .mpeg, etc.) with video player (Windows video player, Potplayer, .etc) never meets black screen.
   
5. Rolling graphic cards' drivers back has been tried but not working.
   
6. Edge as well as IE has same problem as chrome, so I guess the real problem is about video cards indeed.
   

Addition:

I seem to recall that weeks ago when I played web video fullscreen on Monitor 2 (which is not main), Windows crashed and went BLUE SCREEN. Though if Monitor 2 set as main the error would not occur according to my tests.

I really want to know why and how to fix. Thank you.