sony-vaio-z-series team mailing list archive

[Wouter van der Graaf <wouter@xxxxxxxxx>]

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
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