On Wed, 2020-08-26 at 15:03 +0200, Guilhem Lettron wrote: > On Wed, 26 Aug 2020 at 14:43, Rafael J. Wysocki <raf...@kernel.org> wrote: > > On Wed, Aug 26, 2020 at 2:05 PM Guilhem Lettron <guil...@barpilot.io> 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".
Also, if you could runt turbostat - we could see which _actual_ HW C- states are used on your system, which Package C-states are reached. Just get a reasonably new turbostat (it is part of the kernel tree, you can compile it yourself) and run it for few seconds (like 'turbostat sleep 10'), get the output (will be a lot of it), and we can check what is actually going on with regards to C-states. Artem.
