Rear Mic Jack (Pin ID 0x18) on ASRock H170A-X1 (D) mobo is mapped to Line-out. Codec: Realtek ALC892 Address: 0 AFG Function Id: 0x1 (unsol 1) Vendor Id: 0x10ec0892 Subsystem Id: 0x18495892 Revision Id: 0x100302 Probably caused by https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?h=linux-4.8.y&id=2585e17b71c76e974659900d3a4a597e54ebf5bc on 4.8.7 and https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=1a3f099101b85cc93d864eb030d97e7725c72ea7 on master. Users can fix this problem by overriding the pin with hdajackretask
Created attachment 244411 [details] /proc/asound/card0/codec#0
The fix is already in queue. *** This bug has been marked as a duplicate of bug 187431 ***