Re: [PATCH] intel_idle: Add ICL support

[Rafael J. Wysocki]

On Wed, Aug 26, 2020 at 3:09 PM Artem Bityutskiy <dedekind1@xxxxxxxxx> wrote:
>
> On Wed, 2020-08-26 at 15:03 +0200, Guilhem Lettron wrote:
> > On Wed, 26 Aug 2020 at 14:43, Rafael J. Wysocki <rafael@xxxxxxxxxx> wrote:
> > > On Wed, Aug 26, 2020 at 2:05 PM Guilhem Lettron <guilhem@xxxxxxxxxxx> wrote:
> > > > Use the same C-states as SKL
> > >
> > > Why is this change needed?
> >
> > On my laptop, a Dell XPS 13 7390 2-in-1 with i7-1065G7, ACPI only
> > report "C1_ACPI", "C2_ACPI" and "C3_ACPI".
>
> Did you try to dig into the BIOS menus and check if you can enable
> more/deeper C-states?

I would be surprised if there were settings for that in the BIOS, as
Windows only expects #1, C2 and C3 AFAICS.

It might be possible to disable C1E autopromotion, but that option is
not likely to be available on a laptop.

Cheers!