linux-kernel - Re: A desktop environment[1] kernel wishlist

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Date:	Thu, 30 Oct 2014 15:42:40 +0100
From:	Bastien Nocera <hadess@...ess.net>
To:	Theodore Ts'o <tytso@....edu>
Cc:	Andy Lutomirski <luto@...capital.net>, Pavel Machek <pavel@....cz>,
	John Stultz <john.stultz@...aro.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: A desktop environment[1] kernel wishlist

On Wed, 2014-10-29 at 16:26 -0400, Theodore Ts'o wrote:
> On Wed, Oct 29, 2014 at 12:19:56PM -0700, Andy Lutomirski wrote:
> > For a tablet, isn't the relevant piece of information whether the power
> > button was recently pressed, not whether the power button caused the wakeup?
> 
> For Android L devices, it has been reported that the device might
> power up its screen fully (note I didn't say 'wake up') automatically
> when it detects that you are picking it up, or when you double-tap the
> screen.

Power up the screen or the touchscreen?

>   It also reportedly has a low power black and white "ambient
> display" (ala the Android Wear devics) which allows you to see
> notifications without waking up the phone all the way[1].  (All of
> this assuming appropriate hardware support, of course.)
> 
> [1] http://www.androidauthority.com/ambient-display-lollipop-541198/
> 
> Which goes back to the concept of having a "suspend" mode is legacy
> thinking.  Modern devices will soon have not just a "awake" and a
> "asleep" modes; there will be (well, is now) a much wider spectrum of
> modes, with the goal of using the minimum amount of power while still
> providing use functionality to the user.

We still have a huge install base that does use suspend though, and for
which this information would be useful.

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