3.5mm headphone jack not working

[NicolasV15]

Hi dkoluris,I have GU502LWS (with a 4K screen and 10875H CPU),
First I was surprised to see your description of headphone jack working. but for me, everything works perfectly but the silent headphone.
Then I download your EFI files but the problem still remains.
In detail, when an earphone is plugged in, no sound is heard from it. On the other hand, the system do recognize that there is a headphone, and it seems that the volume can be adjusted.
I’ve tried layout-id 21 and 22, which make the speaker work well, but the headphone is always silent.

My friend has a brother version of GU502 with 240Hz refresh rate, and he reports the same problem.
It really bothers me for two months, so I turn to you for assistance, I’d appreciate it if you could give me some advice.

I confirm it’s ALC294 sound card and layout-id 21 or 22 works. Apart from the 10875H, RTX2060, other devices are completely the same to yours.

[koluris]

Very sorry I am unable to help with this, as I have sold the laptop so I can buy a RTX 30xx one.

[NicolasV15]

It doesn't matter. Still thanks for providing me some ideas of disabling dGPU and other patches.

[koluris]

No problem. Indeed we had some investigation in a lot of areas that improved overall compatibility. The only thing i wasn't able to do that really bugged me is output from HDMI & USB-C.

[NicolasV15]

HDMI & Thunderbolt 3 Display cannot be fixed because it's connected to the discrete GPU directly, so it's physically limited. Initially ASUS designed this for better gaming when we use a external monitor. The delay is reduced and FPS can be improved. So it's a pity that output from HDMI & USB-C computed by iGPU is impossible.