hwpstate_intel hangs kernel

[Andreas Nilsson]

On Fri, Jan 24, 2020 at 5:52 PM Andreas Nilsson <andrnils at gmail.com> wrote:

> Hello,
>
> I updated my sources from 20200113 to 20200124 and after that my laptop
> hangs during boot.
>
> The machine is a Lenovo Thinkpad X1 yoga with a core i7-6500U cpu and 8Gb
> ram.
>
> It hangs during kernel boot and the last message printed on console is:
> hwpstate_intel0: <Intel Speed Shift> on cpu0
>
> I reverted commits
> 1c59e40a6928d0e50272f3653cc3be27a94d8ea3
> 0a0670f4aee197f46e40fda8b1c58f15fa882043
> a4e3b5b685179d1576933ac5e67719dfe96efdea
> and recompiled the kernel, which then boots just fine.
>
> Interestingly, the hwpstate_intel code worked fine on my workstation, with
> a Intel i7-7700 cpu.
>
> I set debug.hwpstate_verbose=1 in loader.conf in hopes of getting more
> info, but I could not see any additional information.
>
> Best regards
> Andreas
>

There seems to be further problems: My workstation has since hung, I'm on
my way to the office to check it out now. My laptop with the hwpstate
patches reverted has also hung, so that issue might be due to another
commit.

Best regards
Andreas