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*UPDATE* March 2021
It appears there is light at the end of the tunnel. MS is working on enhancing the HDR feature on Windows 10 to another level. With that there should be massive improvements in the way its implemented and work with games and the OS (I HOPE). I've personally called MS and escalated this to one of their engineers. Hope is on the way, see article below.
https://devblogs.microsoft.com/directx/auto-hdr-preview-for-pc-available-today/
*UPDATE* June 2020
So if you install the latest Nvidia driver 451.48 or later combined with Windows 10 v.2004 it completely fixes the issue for me at least.. I see some post below of users saying it isn't working so I am changing the thread to not fixed.
I've tested past, current versions of Windows and scoured various forums for a fix. This is happening to many many people yet still not fixed... The Windows 10 Volume OSD turns HDR off or appears to have some sort of affect whilst adjusting the volume. When the Windows volume overlay appears on screen while HDR is enabled in fullscreen apps or games, the monitor goes dark. Once the overlay is off screen it turns back on. This is very annoying as I would like to use HDR without my screen turning off in the middle of competitive gaming. Also for what ever reason Nvidia Shadow play or recording doesnt work while HDR is enabled in Windows. Can someone make note of this and please fix it... I know this has been reported before but even on the insider additions of Windows the issues still resides.. :(
The only temp fix I can find is turning on your mouse trail in the mouse settings in windows.. This eliminates the issue but who the heck wants a mouse trail!
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
This PC Local Disk (C:)
Program Files (x86)
Now whatever program/game you're having issues with
Find the .exe for that program/game that you're having issue with
(for me it was games required to be in full screen to enable HDR)
Right click —> Properties Tab
at the top compatibility Check the Disable FullScreen optimization box
If that doesn’t work, try looking for the 64 bit .exe for the same program/game and repeating the same steps.
I have had that setting checked for Warzone for months. It appears that the Nvidia driver is the culprit. The issue came back for me in the last 2 driver release, shoot even happens when HDR isnt enables. All whilst this setting is checked so I dont think its the answer. I almost feel like it has something to do with Nvidia's overlay but havent tested it yet. Oh well I'm over this dumb issues. If we could just disabled the volume OSD that would fix it..
What exactly does this method do?
Hi a have same issue with HP laptop and same monitor. I was trying to switch the HDR in Windows on. After doing this the monitor goes to show black screen (not sleep mode). The monitor is connected via USB cable and I'm any more able to switch the monitor on like before. The monitor works by screen mirror mode but when I close laptop lid it's goes black. I was trying to switch in power management in windows like do nothing by closing lid but I was not success. Also tried to adjust USB always on doesn't help. The same Monitor connected via HDMI cable work without any issue. Problem is only when connected via USB C cable also now I need always connect 2 cables :( what is unliked.
Your issues is definitely an issue with HDR and your laptop but not the same issues as we're all talking about in this thread, just a heads up. The issue in this thread is specifically addressing the Windows Volume OSD causing the screen to go black while on screen. Maybe try to enable the mouse pointer trail, that's one of the only temp fixes for the original issue but super annoying because who wants a mouse trail.
