If there's some Lenovo EU rep with enough budget for their department, this person should really be contracted to fix the audio from their laptops one by one. This seemed to take 2 weeks with a dedicated person and remote access but debugging with access to the device could be much faster!
Those two weeks probably would've been two days had the main developer been able to reboot and test the device directly.
Outsourcing this work to outside developers on the regular probably would make the media claim something like "Lenovo is too lazy to pay their people to make their speakers work so they make strangers on the internet do it instead" which isn't half false.
It'd probably be better and cheaper if they'd just hire someone to make their speakers work on Linux.