Windows 10: Black windows when snapping windows to non-HDR second monitor

I have an issue that's only present when HDR is enabled on my primary monitor. When enabled, if I attempt to snap windows to one of my secondary monitors non-HDR, the window options for snapping are almost entirely black except for the window title see example screenshot below. If I attempt to snap windows on my HDR primary monitor it works correctly with no visual issues. If I disable HDR on my primary monitor the visual issue goes away on the secondary monitor see second screenshot below. Issue present on secondary monitor when HDR enabled on the primary monitor:Issue not present o

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HDR on HDR monitor causes issue on secondary, non-HDR monitor

I have an Aorus AD27QD (HDR) monitor as my primary display and an ultrawide 34UM88-P (Non-HDR) as my secondary. If HDR is enabled in windows and I go to a full screen video on the non-HDR monitor after a few seconds it will flicker blue then become severely
washed out. Coming out of full screen fixes this. If HDR is not enabled full screen shows the colors perfectly normally.

Secondarily, with windows HDR on on the Aorus, the colors dim pretty drastically. HDR content great but anything that isnt HDR is dim enough to make me question if my brightness is turned down. (Its not, its 90/100). The white of a plain browser window
seems so dim its nearly grey. I also tested this on what I know is a particularly vibrant (non-HDR) . HDR on? Terrible and muted. HDR off? Bright and vibrant.

I have played with in-monitor settings, nvidia control panel, factory reset of monitor, basically everything I can think of. Everything points to it being a windows issue.

I also tried out the suggestions from this post. And it pointed me to this
set of OS release notes which didnt solve my issue either.

I could really use some help because I am really feeling like I wasted my money on this monitor.

PC:

i5 7600k

GTX 1080ti

16GB 3000Hz Corsair RAM

Windows, CPU and GPU on latest drivers available.

Monitors:

LG 34UM88-P (HDMI)

Aorus AD27QD (DisplayPort)

 

HDR-capable monitor becomes completely unresponsive when switching between SDR and HDR under certain conditions

I have the Alienware AW3423DW in HDR Peak 1000 mode. Here are the steps to replicate the issue:

The relevant system information is as follows:

• Windows 10 version 21H2
  
• Nvidia GPU with GeForce Game Ready Driver version 528.02
  

1. Power on computer with HDR already enabled in Windows settings from previous session. The computer will start in SDR mode but will switch to HDR as soon as it reaches the lock screen.

2. Launch an application that does not natively support HDR but which runs in exclusive fullscreen (e.g. a non-HDR supported game).

3. Tab out of the game and switch off HDR in Windows settings.

4. Monitor switches off and is completely unresponsive, after a few seconds the Windows "device disconnected" sound effect can be heard.

5. At this point, the only way to restore the monitor is to unplug and replug the power cable of the monitor. Restarting the PC or unplugging and replugging the display cable does not work.

This is how I have manually recreated the issue, but the way it has happened to me most often is by simply alt-tabbing out of an application while running in HDR mode. If the application being tabbed out from is particularly resource-demanding and results in the monitor spending a long time switching between HDR and SDR, then it will completely fail and switch off, becoming unusable.

I have already tried reinstalling my graphics driver which did not help. How can I determine which component (i.e. Operating system, GPU, Monitor) is the point of failure that is causing this problem?

 

Screen goes black when using game bar on HDR monitor

Having this exact issue here:

Redirecting

Users in the thread claim this was fixed with a game bar update. I'm on the latest and still deal with this infuriating issue, and have since I started using an HDR screen for games (years).

When I activate the game bar, the screen identifies the overlay as SDR content and pulls my monitor out of HDR mode, which results in a black screen for a couple seconds, then remains in SDR until the overlay is gone, followed by another black screen as
the monitor goes back into HDR mode.

Also happens with achievements and invites, which I assume are overlay items.

This does not happen in windowed mode for games, but does in borderless window and fullscreen.

I'm stunned this isn't a more widespread issue, but maybe there aren't as many people using HDR monitors as I think there are.