From: Nigel Cunningham <nigel@suspend2.net>
Organization: Suspend2.net
To: Pavel Machek <pavel@ucw.cz>
Subject: Re: Which is simpler? (Was Re: [Suspend2-devel] Re: [ 00/10] [Suspend2] Modules support.)
Date: Tue, 7 Feb 2006 20:06:26 +1000
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Cc: Bojan Smojver <bojan@rexursive.com>, "Rafael J. Wysocki" <rjw@sisk.pl>,
       Lee Revell <rlrevell@joe-job.com>, linux-kernel@vger.kernel.org,
       suspend2-devel@lists.suspend2.net
References: <20060201113710.6320.68289.stgit@localhost.localdomain> <200602071105.45688.nigel@suspend2.net> <20060207092356.GA1742@elf.ucw.cz>
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Hi.

On Tuesday 07 February 2006 19:23, Pavel Machek wrote:
> Hi!
>=20
> > > *Users* would not be at disadvantage, but, surprise, there's one=20
thing
> > > more important than users. Thats developers, and I can guarantee you
> > > that merging 14K lines of code just to delete them half a year later
> > > would drive them crazy.
> >=20
> > It would more be an ever-changing interface that would drive them=20
crazy. So=20
> > why don't we come up with an agreed method of starting a suspend and=20
> > starting a resume that they can use, without worrying about whether=20
> > they're getting swsusp, uswsusp or Suspend2? /sys/power/state seems the=
=20
> > obvious choice for this. An additional /sys entry could perhaps be used=
=20
to=20
> > modify which implementation is used when you echo disk=20
> /sys/power/state=20
> > - something like
> >=20
> > # cat /sys/power/disk_method
> > swsusp uswsusp suspend2
> > # echo uswsusp > /sys/power/disk_method
> > # echo > /sys/power/state
> >=20
> > Is there a big problem with that, which I've missed?
>=20
> Well, for _users_ method seems to be clicking "suspend" in KDE. For
> more experienced users it is powersave -U. And you are already
> distributing script to do suspend... Just hook suspend2 to the same
> gui stuff distributions already use.

The problem is that kpowersave, for example, doesn't provide any way to say=
=20
that you want to start the cycle by doing something other than echo=20
> /sys/power/state. They're apparently planning on changing it to support=20
suspend2, but should they have to (and why again for uswsusp?).
=20
> Besides what you described can't work for uswsusp.

call_usermodehelper

Regards,

Nigel
=2D-=20
See our web page for Howtos, FAQs, the Wiki and mailing list info.
http://www.suspend2.net                IRC: #suspend2 on Freenode

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