On Thu, Oct 30, 2014 at 7:45 AM, Bastien Nocera <had...@hadess.net> wrote: > On Wed, 2014-10-29 at 22:16 +0100, Pavel Machek wrote: >> On Wed 2014-10-29 16:26:16, 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. 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. >> >> Actually Maemo people (on Nokia N900 and friends) got it right: unlike >> android devices, it does not suspend to RAM at any point, and still >> has reasonable battery life. > > Android devices don't suspend to RAM. Neither do Tizen devices AFAIK. > >> So I agree -- using suspend to RAM on "active" cell phone is just a >> bad design. > > I don't think anyone was discussing cell phones in particular in this > thread, and knowing when user-space got woken up because of the baseband > processor having information for us would still be useful. >
You still haven't addressed what problem this solves that isn't solved by merely knowing whether the baseband processor has useful information. --Andy -- Andy Lutomirski AMA Capital Management, LLC -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
