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    SubjectRE: what is the difference between shutdown command and writing to /sys/power/state
    Date
    From
    Can someone tell me the flow of code for these two scenarios -
    I write disk to /sys/power/state. How does system go to hibernation? How
    does this trigger ACPI driver functions?
    I issue shutdown command.
    I am using 2.6.18 kernel.

    Thanks,
    Lomesh

    -----Original Message-----
    From: linux-kernel-owner@vger.kernel.org
    [mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of Rafael J.
    Wysocki
    Sent: Wednesday, September 19, 2007 5:09 PM
    To: Agarwal, Lomesh
    Cc: linux-kernel@vger.kernel.org
    Subject: Re: what is the difference between shutdown command and writing
    to /sys/power/state

    On Wednesday, 19 September 2007 23:37, Agarwal, Lomesh wrote:
    > Can you tell me the differences?
    > Also what do you mean by - depending also on what you mean by 'now'? I

    Please tell me what kernel version you're referring to.

    > gave now as a time parameter to shutdown command. How can it be
    > interpreted in a different way?

    Sorry, I have misunderstood your post (the "now" doesn't look as a part
    of the
    command).

    Greetings,
    Rafael


    > -----Original Message-----
    > From: Rafael J. Wysocki [mailto:rjw@sisk.pl]
    > Sent: Wednesday, September 19, 2007 2:35 PM
    > To: Agarwal, Lomesh
    > Cc: linux-kernel@vger.kernel.org
    > Subject: Re: what is the difference between shutdown command and
    writing
    > to /sys/power/state
    >
    > On Wednesday, 19 September 2007 20:50, Agarwal, Lomesh wrote:
    > > Does linux handles writing "disk" to /sys/power/state and shutdown
    -P
    > > now differently (except writing to disk part)?
    >
    > Yes, it does (depending also on what you mean by 'now').
    -
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