[ohm] OHM vs. PPM

[Holger Macht]

On Sa 03. Mai - 14:35:48, Marc-André Lureau wrote:
> Hi,
> 
> On Fri, May 2, 2008 at 1:13 PM, Rob Taylor <rob.taylor at codethink.co.uk> wrote:
> > Richard Hughes wrote:
> >  > Sure. OHM was designed super small, quick, and per-system for a reason -
> >  > I'm against the change making it per-session. OLPC needs a per-system
> >  > solution, and won't be doing this in the session at all.
> >
> >  Hey Richard! It'd be good if you could go over the reasons for system
> >  level, and also how you see things fitting in with g-p-m.
> >
> >  Personally, I'm not invested in a particular way forward, I just want a
> >  plan that works well for desktop and embedded :)
> 
> I second that. I thought you agreed that ohm fits better in the
> session level in the discussion we had at Fosdem. Obviously, I
> misunderstood. I can't wait to read your answer! For the design
> principle, could you explain why current OHM could not fit in session
> level? The X hack would disappear..
> 
> Certainly, for embedded devices, discussing OHM for system level or
> session level make little sense, since there is often only one
> "system" bus...
> 
> I personally believe that some policies are better run in system level
> (to react to services and hardware) and some other in session level
> (program/user requests, tweakable policies)
> 
> Why not having 2 instances of OHM: system (which has privileges and
> can change policykit configuration) and one per session? Is it so bad?
> 
> I wish the goal of OHM is to have a common framework to express
> policies, instead of having a dozen of different daemons, with hard
> coded policies, different usages and coding styles.
> 
> I also wonder if OHM could offer a library that gnome-settings-daemon
> could use to make session policy decisions (instead of having a
> per-session ohm daemon)

I'm not sure about which systems you're talking here, but if it's usual
laptop/desktop systems, could you explain whats the advantage of having
OHM in a session level against having gnome-power-manager?

Regards,
	Holger