Jack Mic is not catching any sound!!!

[Shahriar Ratul]

I have an Alienware M17 R5 AMD. The built-in microphone works pretty fine. However, when I use my external earphone (which comes with a mic), the earphone speaker works fine, but the "jack mic" does not work. The jack mic is visible when I switch "Headphones" to "Headset (with microphone)" in Realtek Audio Console. The problem is it doesn't catch any sound which I have cross-checked in many ways, especially in the "Sound" settings. I have tried every possible way to fix it, likeswitching from "Headphones" to "Headset (with microphone)"running troubleshootertesting using different platformsunin

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