I'm sorry for not following the correct forum etiquette - I did not mean to offend.
I run Arch Linux on the mainline kernel (4.12-rc1), my linux-firmware package is dated 20170309 (and from a cursory glance at the commit history, it does not seem that anything has been added recently that pertains to my setup). I have the i7-7700HQ with an RX470 as dGPU.
I'll try out the hint about diabling tsc deadline, but I think I'll pass on disabling ACPI and/or running kernel 3.10 - none of my hardware (CPU, GPU, wifi, nvme, thunderbolt3) would be supported by that .
Just out of curiosity - how would I correctly append an output like mine? Also, please see the bug report here.