Comment 6 for bug 1740973

Thanks Hui. It looks like you found a few more Lenovo machines that need this fix.

As well a going into the currently under development 4.18 kernel, the new patch is in the 4.17.4 kernel:

commit 11a74cf5d322b899c95a1544e4ed85b5712babc1
Author: Hui Wang
Date: Mon Jun 25 14:40:56 2018 +0800

    ALSA: hda/realtek - Fix the problem of two front mics on more machines

    commit e41fc8c5bd41b96bfae5ce4c66bee6edabc932e8 upstream.

    We have 3 more Lenovo machines, they all have 2 front mics on them,
    so they need the fixup to change the location for one of two mics.

    Among these 3 Lenovo machines, one of them has the same pin cfg as the
    machine with subid 0x17aa3138, so use the pin cfg table to apply fixup
    for them. The rest machines don't share the same pin cfg, so far use
    the subid to apply fixup for them.

    Fixes: a3dafb2200bf ("ALSA: hda/realtek - adjust the location of one mic")
    Cc: <email address hidden>
    Signed-off-by: Hui Wang
    Signed-off-by: Takashi Iwai
    Signed-off-by: Greg Kroah-Hartman

This patch is also in the 4.14.53 kernel as commit cd41a8fac35a92e3b19365181a337d4dd657bb06