sony-vaio-z-series team mailing list archive

["Reinhard Oldenburg" <roldenburg@xxxxxx>]

Thanks for the two replies so far. They triggered me to install Bumblebee and swithcing to inteal graphivs with this  (and still the originl BIOS) I get power consumption of 13-15 W. This is not as low as others reported but acceptable (yielding 3h of time on battery). Maybe the i7-640M in my model is responsible for this.
Thanks again,
 Reinhard
-------- Original-Nachricht --------
> Datum: Thu, 05 Apr 2012 11:15:27 +0200
> Von: Wouter van der Graaf <wouter@xxxxxxxxx>
> An: Reinhard Oldenburg <roldenburg@xxxxxx>
> CC: sony-vaio-z-series@xxxxxxxxxxxxxxxxxxx
> Betreff: Re: [Sony-vaio-z-series] Power usage of 12.04 on vaio Z13

> Hallo,
> 
> I also use latest Ubuntu 12.04. When I boot my hacked Z13 (VGA 
> switching set to 'static') in Stamina mode the Nvidia card is disabled 
> and not consuming any power. As said in a previous post I only use the 
> Intel card and get between 10 and 15 W. In Speed mode I also get a much 
> higher power consumption around 20 W. If I set VGA switching to the 
> default value (as in a non-hacked Z13 BIOS), both cards make power 
> consumption between 25 and 30 W.
> 
> So I do think that, if you manage to turn off the Nvidia card, your 
> power consumption will drop.
> 
> I have no experience with VGA switching in the default (dynamic) 
> behaviour. I know there have been solutions in the past that require 
> kernel patches and shell scripts. Maybe there's something new now, but 
> you would have to investigate.
> 
> The BIOS hacking went without any problems. It just worked.
> 
> I also have dual boot with the preinstalled Windows 7 intact on a 
> smaller partition. Windows needs the BIOS VGA switching set to 
> 'dynamic'.
> 
> Does anyone know if PRIME will be an answer to our GPU 
> enabling/disabling problem?
> 
> http://www.phoronix.com/scan.php?page=news_item&px=MTA3OTQ
> 
> Kind regards,
> 
> Wouter
> 
> 
> 
> 
> Op wo 04 apr 2012 21:10:43 CEST, Reinhard Oldenburg schreef:
> > Hi all!
> > After some promising reports here I installed Ubuntu beta 2 on my Vaio
> > Z13 (in the meantime with sudo update performed several times). While
> > most things work fine, power consumption is a big issue. Even with
> > wireless turned off, power consumtion is always about 25W, typically
> > 27W. The nvidia card is always running but I doubt that this alone
> > explains this much. I also ran the powertop utility and switched all
> > suggestions to "good" with the exception of killing the external mouse.
> >
> > In the reports of power consumption of about 10W there have been notes
> > on a hacked bios. Is this neccesary? I use my machine (up to now
> > mostly under Win 7) for serious work and can't afford a risky
> > operation. I case one can do it a modest risk, where can I find a
> > description?
> >
> > Any suggestions?
> >
> > Reinhard Oldenburg
> >
> >
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> 
> 
> --
> Wouter van der Graaf
> entreprogrammeur and senior web developer
> 
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