some notebook have unknown loud beep problem.
the it problem was due to the CX8200 chipset.
because have not the kernel quirk processing for cx8200 chipset.
so lg gram and hp spectre notebook used CX8200 chipset it became problem.
but, resolved a problem!
You will get a patched kernel update soon.
Information Source:
https://www.facebook.com/groups/codingeverybody/permalink/2288165977890592
https://github.com/torvalds/linux/commit/d77a4b4a5b0b2ebcbc9840995d91311ef28302ab#diff-f52b6863505adc3b972c64d4a22195cc