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Separating the front (headphone) and back (line-in) jacks on an ALC892 audio chip in Linux

Specific, eh? Needed this for my MSI Z370-A-PRO motherboard, so my headphones and speakers could be treated as separate outputs. By default, having headphones plugged in (front) will disable the speakers (in back). I like to leave both plugged in and toggle them via software.

In /etc/udev/rules.d/jackdetect.rules, add:

ACTION=="add", SUBSYSTEM=="sound", ATTRS{chip_name}=="ALC892", ATTR{hints}="jack_detect=false"
ACTION=="add", SUBSYSTEM=="sound", ATTRS{chip_name}=="ALC892", ATTR{reconfig}="1"

In /usr/share/pulseaudio/alsa-mixer/paths/analog-output-headphones.conf, replace:

[Element Front]
-switch = mute
-volume = zero
+switch = off
+volume = off

Credits:

• https://unix.stackexchange.com/a/542634
• https://bugs.freedesktop.org/show_bug.cgi?id=92679#c2

Installing KVM with a GUI on Linux Mint 19.3 Tricia

$ sudo apt install virt-manager \
  qemu-kvm \
  libvirt-bin \
  ebtables \
  dnsmasq \
  qemu-utils \
  gir1.2-spiceclientgtk-3.0 \
  ovmf

Reboot and make some VMs