Gpd p2 max speaker buzzing sound issue

My GPD p2 max is having the buzzing or humming sound with high pitch on the speaker. It happens on both windows and linux. Bios 0.25.
Some weird behaviors can be listed:

  • Both right and left speaker giving the buzz sound, but the right one is louder.
  • When I touch the trackpad and the metal body, the sound is decreased a bit.
  • Adjusting screen brightness also affecting the buzz sound, if the screen is at lowest brightness, it sounds more.

I’m not sure is that the driver issue or hw fault or ground loop. It could be the wifi signal near to the speaker but I’m not sure. It sounds like you put your cellphone near the speaker sometime.
Anyone has the same issue?

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