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Date: Tue, 17 Feb 2009 22:04:39 +0000
From: Matthew Garrett <mjg59@srcf.ucam.org>
To: mark gross <mgross@linux.intel.com>
Cc: Pavel Machek <pavel@suse.cz>, "Rafael J. Wysocki" <rjw@sisk.pl>,
       pm list <linux-pm@lists.linux-foundation.org>,
       LKML <linux-kernel@vger.kernel.org>, Arve Hj?nnev?g <arve@android.com>,
       Alan Stern <stern@rowland.harvard.edu>,
       Benjamin Herrenschmidt <benh@kernel.crashing.org>,
       Nigel Cunningham <nigel@nigel.suspend2.net>,
       "Woodruff, Richard" <r-woodruff2@ti.com>, Uli Luckas <u.luckas@road.de>,
       Igor Stoppa <igor.stoppa@nokia.com>,
       Brian Swetland <swetland@google.com>, Len Brown <lenb@kernel.org>
Subject: Re: [RFD] Automatic suspend
Message-ID: <20090217220439.GA1573@srcf.ucam.org>
References: <200902160010.16955.rjw@sisk.pl> <20090216225831.GH1370@ucw.cz> <20090216231324.GA15435@srcf.ucam.org> <20090217215717.GA25605@linux.intel.com>
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On Tue, Feb 17, 2009 at 01:57:17PM -0800, mark gross wrote:

> Putting the wake on key event issue aside, is it possible to have wake
> up's on the ms time scale?  I ask because I thought the XO did exactly
> this (but left the screen live).  Why does it take 20 sec to get into
> or out of S3 on my laptop?

Graphics reinit, dumping graphics contents back into RAM, us resuming 
devices in series, that kind of thing. On some hardware you'll spend a 
noticable amount of time in the BIOS before any of the Linux resume code 
gets touched. I thought the XO had got sub second, but I wasn't sure 
that they were in the low ms range.

-- 
Matthew Garrett | mjg59@srcf.ucam.org