Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932273AbaJUSYe (ORCPT ); Tue, 21 Oct 2014 14:24:34 -0400 Received: from mail-lb0-f171.google.com ([209.85.217.171]:34383 "EHLO mail-lb0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753827AbaJUSYc (ORCPT ); Tue, 21 Oct 2014 14:24:32 -0400 MIME-Version: 1.0 In-Reply-To: <1413911644.30379.12.camel@hadess.net> References: <1413881397.30379.7.camel@hadess.net> <1413911644.30379.12.camel@hadess.net> Date: Tue, 21 Oct 2014 20:24:31 +0200 X-Google-Sender-Auth: BJqMWoaOoT36Uzq-TlNLlrhpT5w Message-ID: Subject: Re: A desktop environment[1] kernel wishlist From: Geert Uytterhoeven To: Bastien Nocera Cc: John Stultz , Linux Kernel Mailing List Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 21, 2014 at 7:14 PM, Bastien Nocera wrote: >> As for: 'Export of "wake reason" when the system wakes up (rtc alarm, >> lid open, etc.) and wakealarm (/sys/class/rtc/foo/wakealarm) >> documentation' >> >> Can you expand more on the rational for the need here? Is this for UI >> for power debugging, or something else? > > No, it would be used for automating backups, or implementing > suspend->hibernation transitions. For example, right before the machine > suspends, I would schedule it to wake up in a hour. If I get woken up by > the rtc alarm (and not by the user through a lid open), I might: > - check that I'm plugged into the AC, it's night, and in the vicinity of > the server that handles my backups and so backup the system. > - check whether the battery is low, and hibernate the machine (if it > supports it, obviously). Isn't this already available through /sys/kernel/debug/wakeup_sources and/or the various power/wake* files in sysfs? Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/