Hi,

So when you say GFX button, you mean the FN + F5 command correct? Do you receive any sort of message when you press the keys? Are you showing both the integrated and discrete cards in Device Manager?

FN + F5, Yes. and nothing happen when i press those buttons. Integrated and discrete graphic card are visible on device manager.

Hi,

Thank you for confirming this. Did you install the OSD software? If not, click here for the download link. This software shows a display notification of your action when you use the FN keys. Try testing the FN + F5 keys after installing the OSD software.

Sorry for late answer. and I did install OSD software. But it didn't work.

So I just decided to downgrade to Windows 8.1. And it work pretty well.

I think OSD software doesn't work with W10 based on my case.