sony-vaio-z-series team mailing list archive

[Norbert Preining <preining@xxxxxxxx>]

On Mi, 17 Jun 2009, Matthias Welwarsky wrote:
> ... and you can always switch speed/stamina via sysfs. no need for additional 
> modules.

Thanks Matthias,

I can confirm that using this switch-graphics /etc/init.d script:
#!/bin/sh
lspci | grep "00:02.0"
# if we find the Intel chipset, use Intel drivers & settings
if [ $? -eq 0 ]; then
        logger "Setting graphics card to INTEL"
        cp /etc/X11/xorg.conf.INTEL /etc/X11/xorg.conf
        ln -sf /usr/lib/libGL.so.1.INTEL /usr/lib/libGL.so.1
        ln -sf /usr/lib/xorg/modules/extensions/libglx.so.INTEL
/usr/lib/xorg/modules/extensions/libglx.so
        echo stamina > /sys/devices/platform/sony-laptop/speed_stamina
else
        # otherwise use nVidia drivers & settings
        logger "Setting graphics card to NVIDIA"
        cp /etc/X11/xorg.conf.NVIDIA /etc/X11/xorg.conf
        ln -sf /usr/lib/libGL.so.185.18.14 /usr/lib/libGL.so.1
        ln -sf /usr/lib/xorg/modules/extensions/libglx.so.185.18.14
/usr/lib/xorg/modules/extensions/libglx.so
        echo speed > /sys/devices/platform/sony-laptop/speed_stamina
fi

together with loading sony-laptop originally with speed_stamina=3 makes
everything work as expected:
- intel and nvidia can be selected with hardware switch when laptop is
  turned off
- energy usage is down to low levels:
  when I have gnome running, but all wireless modules turned off with
  rfkill switches and running only powertop with all suggestions I come
  down to
	~10W with Intel card
	~12W with nVidia card
  That is *very* fine.

Thanks a lot!!!

Best wishes

Norbert

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Dr. Norbert Preining <preining@xxxxxxxx>        Vienna University of Technology
Debian Developer <preining@xxxxxxxxxx>                         Debian TeX Group
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