Headphone mic not working or not recognized in Linux mint with Helios Phn16-71-768W

Laptop in use: PREDATOR HELIOS NEO 16 https://www.acer.com/us-en/predator/laptops/helios/helios-neo-16/pdp/NH.QLUAA.008

Installed Linux mint 21.3 recently. Faced lots of issue, but was able to fix it. (Thanks to Linux Mint community and Acer community) But got stuck on this one issue, gone through most of the related forums, but none of them worked.

In input tab of sound setting, even though headphone is not inserted the option to select headphone is always there along with internal mic option. And after inserting the headphone, it remains same and doesn't work even if the headphone option is selected.

Screenshot from 2024-02-27 19-43-05.png

Post link to linux mint forum:

https://forums.linuxmint.com/viewtopic.php?p=2445353#p2445353

Accepted answers

All comments

What happens to the external mic if you first mute the internal mic?

https://community.acer.com/en/discussion/comment/1267830#Comment_1267830

Nothing happens, it remains as it was.

Was Pavucontrol ever installed and run while the headset was plugged in? If not, open software manager. Search 'pavu' and install the Mint version.

https://community.acer.com/en/discussion/comment/1268142#Comment_1268142

I think it wasn't installed while the headphone was plugged in. But even though I installed it with headphone plugged in, it didn't work.

A Mint sound firmware update has just been released. Please install it before proceeding.

Then post 2 screenshots of PavuControl as it opens. One with the headset unplugged. And the other with the headset plugged in.

https://community.acer.com/en/discussion/comment/1268296#Comment_1268296

Installed the new update of mint sound firmware, and here are the 2 screenshots:

One with the headset unplugged:

Screenshot from 2024-04-04 10-43-38.png

the other with the headset plugged in:

Screenshot from 2024-04-04 10-48-22.png

What happens when you click at each red spot shown below?

https://community.acer.com/en/discussion/comment/1268480#Comment_1268480

Nothing happened, only the internal mic got disabled, external still not working.🙁

OK Looks like many older 3.5mm plug-wired headsets that are primarily advertised & sold for Windows have same issue on newer PCs. The scar and your other old headsets may fall into this category. This suggests a kernel level incompatibility.

Since the older 3.5mm audio connectivity standard is being phased out in favor of bluetooth and usb connectivity, a kernel fix is unlikely to happen anytime soon. Many folks claim the issue can be solved either by switching to a wireless bluetooth headset or using a USB port via an inexpensive 3.5mm USB-2-Jack adapter for older Windows 3.5mm headsets like your scar.

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