I'm not certain that having the latest alsa-utils is mandatory, so maybe
ignoring it will be fine.

Also, you may need to pass an option to the sound module (to select the
same codepath as Lenovo), since your laptop doesn't seem to be listed in
driver's pci quirck list (alsa-kernel/pci/hda/patch_analog.c around line
833). In /etc/modprobe.d/alsa-base, add:

options snd-hda-intel model=laptop-automute

Then, you have two tests:
1. Build without the patch. If the speakers automute, then you're lucky ;-)
2. If 1 failed, build with the patch.

-- 
Laptop speakers not muted when plugging in headphones
https://bugs.launchpad.net/bugs/94566
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