From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Phillip Susi <psusi@cfl.rr.com>
Cc: linux-acpi@vger.kernel.org
Subject: Re: Automatic S1 sleep
Date: Tue, 11 May 2010 18:19:00 +0100 [thread overview]
Message-ID: <20100511171900.GA17704@srcf.ucam.org> (raw)
In-Reply-To: <4BE97FC9.4040302@cfl.rr.com>
On Tue, May 11, 2010 at 12:03:21PM -0400, Phillip Susi wrote:
> Unlike S3, S1 keeps the Vcc power plane on and all devices remain in D0
> or D1, so the screen remains on and visible, so it should be possible to
> use this state transparently without the user even being aware of it.
> Since everything remains on, no hardware needs reinitialized when
> resuming from S1. Here seems to be a problem with the current kernel code:
You'll need wakeup events on mouse, keyboard, network packets and so on.
Some of these are possible, some aren't really.
> Does anyone have any thoughts on my conclusion or advice on how to
> trigger S1 without generating PM_EVENT_SUSPEND?
Just have suspend_devices_and_enter conditionalise the device suspend on
whether or not it's PM_SUSPEND_STANDBY.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2010-05-11 17:19 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-11 16:03 Automatic S1 sleep Phillip Susi
2010-05-11 17:19 ` Matthew Garrett [this message]
2010-05-11 18:18 ` Phillip Susi
2010-05-11 18:21 ` Matthew Garrett
2010-05-11 18:43 ` Phillip Susi
2010-05-11 20:19 ` Phillip Susi
2010-05-12 5:57 ` Len Brown
2010-05-12 13:39 ` Phillip Susi
2010-05-20 4:07 ` Len Brown
2010-05-20 13:51 ` Phillip Susi
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