HP Spectre x360 - 15 (2020) [15t-eb100CT] // Display Issues

[luke_2024]

Hi all - I'm having issues with my x360 15" running Windows 11 Pro (23H2).

I use my x360 with the lid closed, plugged into a monitor all day at work and have never had an issue with this before... but just this week my laptop display won't turn on after unplugging it from the HDMI cable. The computer isn't sleeping (the keyboard lights up, fans are on, etc.), so it's still awake. But here's what's weird...

The display turns on once I plug it back into my monitor.

So, the display turns on when mirroring the monitor, but when I unplug the laptop, the display turns off and won't turn back on. It's like it gets stuck from switching between the 1080p monitor display and the 4K display of the laptop.

My only way to fix this is to force a restart with the power button, then the laptop will turn back on and the screen will work (until it falls asleep, then the same thing happens again).

I tried running the command prompt sft /scannow and was given "Windows Resource Protection did not find any integrity violations" as a result.

I also updated all of the graphics drivers to no avail.

I did just install two updates this past week (4/11):
2024-04 Cumulative Update for Windows 11 Version 23H2 for x64-based Systems (KB5036893)
2024-04 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 23H2 for x64 (KB5036620)

Neither of those updates look like they have anything to do with display.

I also spoke with someone else on Reddit who is having the same issue after doing the most recent Cumulative Update for Windows 10.

What's going on here?