sony-vaio-z-series team mailing list archive

[Nicklas Overgaard <nicklas@xxxxxxxxx>]

Hi Norbert and Leonardo,

I think that Leonardo is talking about these regressions: 
http://www.phoronix.com/scan.php?page=article&item=linux_31_power_regress&num=1 
<http://www.phoronix.com/scan.php?page=article&item=linux_31_power_regress&num=1>

Don't know how reliable the phronoix tests are, but they do show that 
something is wrong. I can also see on my VPCZ2 that it draws much more 
power in idle than windows does. Four hours of battery time in linux, 7 
to 8 hours in windows.

/Nicklas
On 2011-09-07 01:01, Norbert Preining wrote:
> 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
> ------------------------------------------------------------------------
> Norbert Preining            preining@{jaist.ac.jp, logic.at, debian.org}
> JAIST, Japan                                 TeX Live&  Debian Developer
> DSA: 0x09C5B094   fp: 14DF 2E6C 0307 BE6D AD76  A9C0 D2BF 4AA3 09C5 B094
> ------------------------------------------------------------------------
> HOGGESTON (n.)
> The action of overshaking a pair of dice in a cup in the mistaken
> belief that this will affect the eventual outcome in your favour and
> not irritate everyone else.
> 			--- Douglas Adams, The Meaning of Liff
>
> _______________________________________________
> Mailing list: https://launchpad.net/~sony-vaio-z-series
> Post to     : sony-vaio-z-series@xxxxxxxxxxxxxxxxxxx
> Unsubscribe : https://launchpad.net/~sony-vaio-z-series
> More help   : https://help.launchpad.net/ListHelp