Re: [PATCH 0/3] ACPI / sleep: Support power button wakeup from S2I on recent Dell laptops

Tom Lanyon
2017-06-02T01:07:13Z

On 2 June 2017 at 00:59, Rafael J. Wysocki <rafael@kernel.org> wrote:
>
> Quoting from my cover letter:
>
> "After this series there still is a concern regarding the possible increase of
> power draw that may result from the processing of non-wakeup EC events while
> suspended which is why the change only affects Dell XPS13 9360 and 9365
> for now."
>
> So that is what happens, unfortunately, and we can't do much about it
> at the moment.

OK, but at the moment this is a regression in functionality on those
platforms. Without this patchset, I can successfully s2idle
suspend/resume on an XPS 9365 (albeit with a little bit of awkward
fiddling of the power button to resume). After the patchset, I can't
realistically go into s2idle at all.

> The only way to avoid that would be to reconfigure the EC during
> suspend to stop generating non-wakeup events, but today we have no
> reliable way to do that.

I thought I had read one one of the threads that this was possible in
the same way that it is for Windows on these laptops. What's missing
to make this possible?

Tom