linux-kernel - Re: [PATCH] ACPI / sleep: EC-based wakeup from suspend-to-idle on recent systems

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Date:   Tue, 27 Jun 2017 20:54:08 +1000
From:   Tom Lanyon <tom@...shoeco.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Linux ACPI <linux-acpi@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Darren Hart <dvhart@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Mario Limonciello <mario.limonciello@...l.com>,
        Jérôme de Bretagne 
        <jerome.debretagne@...il.com>, "Zheng, Lv" <lv.zheng@...el.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] ACPI / sleep: EC-based wakeup from suspend-to-idle on
 recent systems

On 27 June 2017 at 16:47, Andy Shevchenko <andy.shevchenko@...il.com> wrote:
> Tom, thanks for this.
> I would speculate that the problem might be in the certain device
> drivers. It would be nice to get statistics which wakeup source
> generates more hits.

Is this something I can determine without CONFIG_ACPI_DEBUG being enabled?

I don't get anything in dmesg other than indications that it's
resuming and then sleeping again every second or so.

[   45.463907] PM: Suspending system (freeze)
[   47.703216] PM: suspend of devices complete after 2028.170 msecs
[   47.721329] PM: late suspend of devices complete after 18.108 msecs
[   47.723153] ACPI : EC: interrupt blocked
[   47.757801] PM: noirq suspend of devices complete after 35.746 msecs
[   47.757802] PM: suspend-to-idle
[   48.944708] Suspended for 0.779 seconds
[   48.945030] ACPI : EC: interrupt unblocked
[   48.980728] PM: noirq resume of devices complete after 35.924 msecs
[   48.982265] ACPI : EC: interrupt blocked
[   49.027946] PM: noirq suspend of devices complete after 47.016 msecs