sony-vaio-z-series team mailing list archive

[Tobias Oetiker <tobi@xxxxxxxxxx>]

Hi Bertt,

Today Brett Howard wrote:

> just for another data point... I just switched to speed mode and
> rebooted.  the open source Nvidia drivers actually just fired up and
> the system seems to be running fine at full resolution.  I'm unable to
> adjust display brightness but with only firefox open (typing this
> email) and my default boot I'm drawing about 24.2 watts with all
> powertop tunables enabled.

I think I found what was causing my problem ... I had added i915 to
initrd to satisfy the error raised by intel_ips about missing i915
symbols ... but it seems, that when intel_ips is using i915
functionality, power use use goes through the roof ...

see also

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/724569

cheers
tobi


> Not sure if any of this helps but just thought I'd throw this out there.
>
> ~Brett
>
> On Sun, Oct 23, 2011 at 2:15 AM, Tobias Oetiker <tobi@xxxxxxxxxx> wrote:
> > Hi Bertt,
> >
> > wow ... so there is hope :-)
> >
> > which kernel and desktop are you running ?
> >
> > in what state do you get that kind of use ? backlight set to
> > minimum, no X running ? all PM suggestions made by powertop enabled
> > ?
> >
> > cheers
> > tobi
> >
> > Today Brett Howard wrote:
> >
> >> I'm running a fresh install of Ubuntu 11.10 on my VPCZ12CGX/x I've
> >> made some of the changes to my /etc/default/grub file...
> >>
> >> my line reads as follows:
> >> GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pcie_aspm=force i915.i915_enable_rc6=1"
> >>
> >> but it only makes a very small difference.
> >>
> >> I've hacked my bios to force my laptop into static graphics switching
> >> and I'm running in stamina mode.  Running "lspci | grep VGA" only
> >> returns the one card on my machine:
> >> 00:02.0 VGA compatible controller: Intel Corporation Core Processor
> >> Integrated Graphics Controller (rev 02)
> >>
> >> The return I get from the command that you request is as follows:
> >> brett@lappy:~$ grep rate /proc/acpi/battery/BAT1/state
> >> present rate:            11491 mW
> >>
> >> Hope that you end up finding a solution!
> >>
> >> ~Brett
> >>
> >>
> >
> > --
> > Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
> > http://it.oetiker.ch tobi@xxxxxxxxxx ++41 62 775 9902 / sb: -9900
> >
>
>

-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi@xxxxxxxxxx ++41 62 775 9902 / sb: -9900