Is anyone also facing issue with the combojack audio output?

[iwissemben]

When plugging a headset in the jack port after a fresh boot, its output always gives a continuous hissing noise.

The issue is that, with the best working layout-ids (13 and 77) for my config, when I plug my HyperX Cloud II single jack headset to my laptop I get a continuous high-pitched hissing/static noise. When no audio is played I only hear that noise, otherwise I still can hear it in the background and it's giving me a headache. The headsets microphone is also not detected but the internal speakers and microphone are working perfectly.

I noticed that when I put my computer totally to sleep then wake it up, the hissing noise totally disappears (tried for hours).

I've also tested all alc295 layouts (see results below):

I've been investigating this for a while now, but i cant find a solution.

Maybe its caused by bad AppleALC kext initialization?

[iwissemben]

To give you more information , here's what I have tried and noticed so far:

1. On Ubuntu I had the exact same issue with my jack headset (hissing noise and non functional mic) on a clean install of the latest ubuntu bistro, but I found a way to fix it:

• How? thanks to this discussion

• I solved the issue on ubuntu by only entering this command in the terminal :
  echo 'options snd-hda-intel model=dell-headset-multi' | sudo tee /etc/modprobe.d/alsa-base.conf

2.a. I compared the codecdumps obtained on a clean install and after patching the audio with that command and I noticed that many of the fields have been modified

• 

2.b. I also compared the fully functional codecdump when the headset is unplugged then plugged and I noticed that some coefficient have been modified.

• 

Here I found interesting that according to whether jack is plugged or not:

• the "Amp-out Vals" of the nodes 2(0x02) and 3(0x03) automatically switch antithetically between disabled state (0x00) and enabled (0x3c) (cf. line 25 and 38) .

• the "Amp-out Vals" of the nodes 20(0x14) & 33(0x21) automatically switch antithetically between disabled state (0x80) and enabled (0x00) (cf. line 135 & 265).

• the audio mixer 35(0x23) switches the "Amp-in Vals" of the connected nodes 25(0x19) and 18(0x12) automatically switch antithetically between disabled state (0x80) and enabled (0x00) (cf. line 284).