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From: Pavel Machek <pavel@ucw.cz>
To: Michael Nazzareno Trimarchi <michael@amarulasolutions.com>
Cc: kernel list <linux-kernel@vger.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	Linux OMAP Mailing List <linux-omap@vger.kernel.org>,
	Tony Lindgren <tony@atomide.com>,
	Sebastian Reichel <sre@kernel.org>,
	nekit1000@gmail.com, mpartap@gmx.net,
	Merlijn Wajer <merlijn@wizzup.org>
Subject: Re: Droid 4: suspend to RAM?
Date: Fri, 27 Jul 2018 13:32:15 +0200	[thread overview]
Message-ID: <20180727113214.GA32069@amd> (raw)
In-Reply-To: <20180725212853.GA1965@amd>

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Hi!
> > > high even before modem (and thus USB) is enabled.
> > >
> > > Interestingly, CyanogenMod and Jolla seem to have higher power
> > > consumption than stock operating system.
> > >
> > > (My Linux can survive for 10 hours, stock system could survive for 4
> > > days if I'm not mistaken).
> > >
> > > I thought I would experiment with suspend to RAM.. and it indeed
> > > seemed to suspend ok, but I could not wake it up. Do I need to set up
> > > wakeup with button somehow? Is suspend to RAM required for good power
> > > consumption?
> > 
> > Sorry but pm subsystem has debug mode that you can test in a easy way.
> > You can even wakeup by any rtc alarm easily.
> 
> Yes, that is how it works on PC (but there power button works,
> too). Is it expected to work on Droid in v4.18?

I tried setting up wakeup using RTC, but no, it does not seem to work:

root@devuan:/my/tui/d4# rtcwake -m no -s 5
rtcwake: wakeup using /dev/rtc0 at Fri Jul 27 11:28:44 2018
root@devuan:/my/tui/d4# echo mem > /sys/power/state

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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WARNING: multiple messages have this Message-ID (diff)
From: pavel@ucw.cz (Pavel Machek)
To: linux-arm-kernel@lists.infradead.org
Subject: Droid 4: suspend to RAM?
Date: Fri, 27 Jul 2018 13:32:15 +0200	[thread overview]
Message-ID: <20180727113214.GA32069@amd> (raw)
In-Reply-To: <20180725212853.GA1965@amd>

Hi!
> > > high even before modem (and thus USB) is enabled.
> > >
> > > Interestingly, CyanogenMod and Jolla seem to have higher power
> > > consumption than stock operating system.
> > >
> > > (My Linux can survive for 10 hours, stock system could survive for 4
> > > days if I'm not mistaken).
> > >
> > > I thought I would experiment with suspend to RAM.. and it indeed
> > > seemed to suspend ok, but I could not wake it up. Do I need to set up
> > > wakeup with button somehow? Is suspend to RAM required for good power
> > > consumption?
> > 
> > Sorry but pm subsystem has debug mode that you can test in a easy way.
> > You can even wakeup by any rtc alarm easily.
> 
> Yes, that is how it works on PC (but there power button works,
> too). Is it expected to work on Droid in v4.18?

I tried setting up wakeup using RTC, but no, it does not seem to work:

root at devuan:/my/tui/d4# rtcwake -m no -s 5
rtcwake: wakeup using /dev/rtc0 at Fri Jul 27 11:28:44 2018
root at devuan:/my/tui/d4# echo mem > /sys/power/state

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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  reply	other threads:[~2018-07-27 11:32 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-25 20:02 Droid 4: suspend to RAM? Pavel Machek
2018-07-25 20:02 ` Pavel Machek
2018-07-25 20:33 ` Michael Nazzareno Trimarchi
2018-07-25 20:33   ` Michael Nazzareno Trimarchi
2018-07-25 21:28   ` Pavel Machek
2018-07-25 21:28     ` Pavel Machek
2018-07-27 11:32     ` Pavel Machek [this message]
2018-07-27 11:32       ` Pavel Machek
2018-08-08  9:05       ` Tony Lindgren
2018-08-08  9:05         ` Tony Lindgren
2018-08-08 21:32         ` Pavel Machek
2018-08-08 21:32           ` Pavel Machek
2018-08-09  8:22           ` Tony Lindgren
2018-08-09  8:22             ` Tony Lindgren
2018-08-09  8:22             ` Tony Lindgren
2018-08-10 10:43         ` Pavel Machek
2018-08-10 10:43           ` Pavel Machek
2018-08-10 11:03         ` Pavel Machek
2018-08-10 11:03           ` Pavel Machek

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