Headphone jack & audio switching

[moonwalkers]

I can't seem to find it right now, but I've seen in Manjaro a package that vends a systemd service, an acpid event definition, and two scripts - one toggles headphones and built-in speakers on/off, and another that sets them correctly on boot. And it works correctly on my machine, so the issue seems to be less of an audio jack hardware and more of a some weird non-standard solution on how the event is interpreted in hardware/software, requiring extra hacks like said Manjaro package.