hwpstate_intel hangs kernel

[Andreas Nilsson]

Hello Conrad,

thank you Andrey for bisecting! I'll try with that hint and see how it
works for me.

Best regards
Andreas

On Sat, Feb 1, 2020, 18:18 Conrad Meyer <cem at freebsd.org> wrote:

> Hi Andrey,
>
> Please try 'hint.hwpstate_intel.0.disabled="1"' as a workaround for now.
>
> I think I have identified at least one problematic piece of code,
> although I don't know if it's the root cause.  I will go ahead and fix
> that, which may not fix the hang, and also add some debug printfs that
> can be enabled to help identify the real issue.
>
> Thanks for the report and bisect.
>
> Best,
> Conrad
>
> On Sat, Feb 1, 2020 at 6:06 AM Andrey V. Elsukov <bu7cher at yandex.ru>
> wrote:
> >
> > 31.01.2020 18:11, Andrey V. Elsukov пишет:
> > > On 24.01.2020 19:52, Andreas Nilsson wrote:
> > >> It hangs during kernel boot and the last message printed on console
> is:
> > >> hwpstate_intel0: <Intel Speed Shift> on cpu0
> > >
> > > Hi,
> > >
> > > Did you find the cause of this hang?
> > > I also tried to update today from r350816 to r357330. But my Lenovo X1
> > > Carbon 4th hangs on the same message.
> > >
> >
> > Hi,
> >
> > I have bisected the bad commit, it is r357002.
> >
> > --
> > WBR, Andrey V. Elsukov
> >
>