@Sorfrost: The acpi tables attached are for some reason not complete and
cannot be  disassembled.

Please do "sudo apt install acpica-tools" and then

sudo acpidump | gzip > /tmp/acpidump.gz

and attach /tmp/acpidump.gz to this bug report.

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  Dell Vostro 5568 - Sound device disappears after connecting headphones

Status in linux package in Ubuntu:

Bug description:
  With all kernel versions so far tested including mainline v4.15.4 the
  audio device permanently disappears even after a cold reboot once the
  headphones have been plugged/unplugged.

  Looks to be a firmware issue; latest firmware has been installed but
  issue remains.

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