Windows 11 Window's "GPU" selector does not function

Hello,
It seems like you've already taken some good troubleshooting steps to address the GPU selection issue you're experiencing in Windows. Let's explore a few more potential solutions.
1. Check GPU driver settings: Ensure that the driver settings for both of your GPUs are correctly configured. Open the NVIDIA Control Panel or AMD Radeon Settings (depending on your GPU brand), and look for settings related to GPU selection or power management. Make sure the correct settings are enabled for each GPU.
2. Adjust Windows power settings: Windows has power management settings that determine how GPUs are used. Open the Windows Settings app, navigate to System > Power & sleep, and click on "Additional power settings" to access the Power Options. Select the power plan you are currently using and click on "Change plan settings". From there, click on "Change advanced power settings" and locate the "Switchable Dynamic Graphics" or "Graphics Power Settings" option. Make sure it is set to the intended behavior.
3. Disable the unwanted GPU: If all else fails, you can try disabling the high-performance GPU temporarily to force the system to use the power-saving GPU. Right-click on the Windows Start button, select Device Manager, expand the Display adapters category, right-click on the high-performance GPU, and choose "Disable device". This will prevent the system from using that GPU and force it to use the other one.
4. Contact GPU manufacturer support: If none of the above solutions work, it would be worth reaching out to the support team of your GPU manufacturer. They may have specific recommendations or driver updates that can help resolve the issue. Provide them with as much detail as possible regarding your issue and the steps you've taken so far.
Hopefully, one of these suggestions will help you resolve the problem and get the GPU selection feature working as intended. Good luck!