Power consumption with Fedora

[Stephen John Smoogen]

On 1 December 2014 at 17:57, john.tiger <john.tigernassau at gmail.com> wrote:

> Obviously priority is now on F21 bugs but looking beyond that
>
> I want to work with someone more knowledgeable on power consumption - it
> stinks on Fedora 20.
>
> OSX on mac air gets 11-12 hrs  Fedora gets 4
> Chrome OS on Chromebook gets 9-10  Fedora gets about 6
>
> Tried powertop - see slight improvement.
>
> Guys at ARCH claim with powerdown scripts they get close to 11 on Mac Air
> - that's good
>
>
I would test it first before you go by their word. There are a lot of
things which can be done to make power consumption better.



> So we need to get the powerdown scripts to work well with Fedora.  I have
> no idea how much conversion, if any is needed for Fedora - just don't have
> the knowledge of processes, Fedora scripts, etc.  But willing to help out,
> test, etc.  (I want 11 hrs on my Mac Air !).


OK, a couple of things. Fedora sub-projects work well when the following
happens:

1) A problem is identified.
2) Profile the problem and show where it might be happening.
3) Some amount on fixing the problem is done.
4) Find that the problem isn't there and there is no quick fix.
5) Throw away that solution and implement another one.
6) Deal with flame wars about any and all changes during this from people
the problem doesn't occur to.

Projects which use words like "we" before 3 or 4 usually never get to 3 or
4 due to the amount of "why is your problem now my work?" response from
everyone from developers to random people on the lists.

Currently you are at 1, and you have tried to jump to 3 with the Arch
solution. You need to profile the Arch solution to see if it really works
or if it only works if you run an X11/twm and nothing fancier than Mosaic
from 1997. [Or without X11 at all.. that is the usual way to get a large
power improvement on a laptop.] From that you can say "Yes it actually
fixed things and I was doing what I was doing in regular Fedora but the
laptop lasted 11 hours versus 4." Then you can start working on seeing if
the scripts can be implemented in Fedora somewhere.



-- 
Stephen J Smoogen.
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