@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:
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
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