hi - well then it's a bigger issue, i got tired of troubleshooting this on a brand new laptop, when such a basic feature should work out of the box.
I sent the laptop at the repair center, let's see if they have to swap everything motherboard, CPU, RAM, etc like they did for the other memeber or maybe they give me a brand new Zenbook.
To answer your question
There's no specific error in event viewer, there's the usual hangs and stuff from windows (now i cannot check anyway since i sent the laptop yesterday morning), there was one error code from Intel audio but i checked with intel and they said that's normal if you have HDMI connected.
BIOS have been flashed to latest twice, then loaded defaults, i have done all that, i work wth PCs over 10 years so i know basic troubleshooting stuff, etc - sorry but this is just annoying and a problem with the laptop. I almost regret having ordered this fancy Zenbook, i should have taken a Vivobook, bigger, uglier but better performance, more resistance to high temps, and not much of this.
Nothing weird in Device Manager either, all normal
Not your fault and sorry if it comes across harsh but i am quite annoyed by this.