- Edited
This one doesn't make sense to me. The laptop is a Dell Precision 7520. Detailed specs are below. It has an Intel HD Graphics 530 iGPU and Nvidia Quadro M2200 dGPU.
It gives me bad headaches in the Win 10 desktop environment. It supposedly has a hardware mux switch, and disabling the iGPU (uncheck "Enable Switchable Graphics" in the BIOS) makes the headache severity even worse.
Confusingly, when I am playing a DirectX 11 game (Mechwarrior Online, I have not tested other games), I don't get any symptoms in fullscreen mode. Playing in fullscreen windowed mode produces the same headaches.
I know I am generally sensitive to PWM, and using this tool makes the headaches from the desktop environment slightly better: https://github.com/tpurtell/PWM. The tool reports a PWM frequency of 200. Adjusting the monitor calibration to slightly reduce contrast and adjust the colors and gamma has slightly helped.
I was hoping that since I didn't get headaches in game, disabling the iGPU would fix the issue. Unfortunately, it doesn't. Is there some Windows setting I'm missing?
I've played around with various tools to disable dithering (https://kawamoto.no-ip.org/henteko/myapp.html#ditherig) but it didn't seem to make a difference.
I have another laptop, an old Thinkpad T440s, which I tolerate fine in the desktop environment, that is running the same build/update version of Win 10. There were some copies of that laptop with different panels that I couldn't tolerate, however.
Another strange thing is that when I had a bad case of the flu, I didn't notice the headaches (???). Maybe the pain from the flu was just masking it.
EDIT: even more confusing, after trying out some peripheral gaze stretches, and some 'magic eye' images, the headaches seem reduced? https://old.reddit.com/r/Strabismus/comments/11sqoxn/recovering_binocular_vision_in_adulthood/
Device name
Processor Intel(R) Core(TM) i7-6820HQ CPU @ 2.70GHz 2.70 GHz
Installed RAM 32.0 GB (31.9 GB usable)
System type 64-bit operating system, x64-based processor
Pen and touch No pen or touch input is available for this display
Edition Windows 10 Pro
Version 22H2
Installed on 9/30/2024
OS build 19045.4894
Experience Windows Feature Experience Pack 1000.19060.1000.0