https://bugzilla.kernel.org/show_bug.cgi?id=193981
--- Comment #10 from Alex Deucher (alexdeucher@gmail.com) --- (In reply to winches from comment #9)
hello, i have the same bug. On my sapphire r9 380 itx, the fan seem to work at 100% from the loading of the kernel (no problem in bios and in grub stage). T he bug seem to occur since the 4.9 series.
Can you bisect?