sony-vaio-z-series team mailing list archive

[Norbert Preining <preining@xxxxxxxx>]

Hi Leonardo,

On Di, 06 Sep 2011, Leonardo Rodriguez wrote:
> With 2.6.35 kernel and NVIDIA I can see power usage in powertop. It is  
> usually around 25Wh at idle, varying between 20-30Wh. On occasion it  
> drops to 17Wh.

Well, that is a lot.

> Are you sure that lspci | grep VGA showing both cards is not an issue?

No, I am not, but I see both cards here and I am going down to 10
when idle.

> From the research I have done it seems like the excessive power  
> consumption is related to kernel power management issues, which have  
> only become worse in recent kernels. I guess I was expecting the sony  

??? I would say rubbish. I am following kernel development very closely
with building git kernels quite often, and I have never seen this
behaviour.

> module to somehow enable power management features not  
> recognized/enabled by the kernel out of the box, but this doesn't seem  

All the power management features are enabled already *without* the
sony-laptopt module *BUT*:
- turning off nvidia car (did you pass the right module parameters?)
- creating rfkill switches for bluetooth wlan etc
- adding additional sys file switches for the ODD and other

> I know I can "echo " parameters, but how do I set the module parameters  
> at boot time? Do you just create an entry under /etc/modprobe.d and set  
> the options there? What about the module loading order, etc?

http://lmgtfy.com/?q=linux+module+parameter+boot+time+debian&l=1
???
(is it sooooo hard????)

Best wishes

Norbert
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Norbert Preining            preining@{jaist.ac.jp, logic.at, debian.org}
JAIST, Japan                                 TeX Live & Debian Developer
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