Ubuntu On Sony Vaio FW Series

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Posts Tagged ‘cpufreq

Undervolt for Intrepid

with 10 comments

Well, Happy New Year! I guess this is the last post in this year, so let’s get our undervolting back with 2.6.27 kernels.

First of all go to phc.athousandnights.de and download 0.3.2 version of patch. Put this into directory where you have or will have kernel sources.

If you have not sources yet, do things like in the 4th step from the post about brightness:

sudo apt-get build-dep linux-source-2.6.27
sudo apt-get install linux-source-2.6.27
cp /usr/src/linux-source-2.6.27.tar.bz2 ./
tar jxvf linux-source-2.6.27.tar.bz2
cd linux-source-2.6.27

Put linux-phc-0.3.2-kernel-vanilla-2.6.26.patch.tar.gz in your current dir (linux-source-2.6.27) and unpack it, then patch the kernel sources:

tar zxvf linux-phc-0.3.2-kernel-vanilla-2.6.26.patch.tar.gz
patch -p1 < linux-phc-0.3.2-kernel-vanilla-2.6.26.patch [/sourcecode] Now go into cpufreq module dir and compile it and then install new compiled version: [sourcecode language="python"] cd arch/x86/kernel/cpu/cpufreq/ make -C /lib/modules/`uname -r`/build/ M=`pwd` modules strip --strip-debug acpi-cpufreq.ko sudo install -m644 -b acpi-cpufreq.ko /lib/modules/`uname -r`/kernel/arch/x86/kernel/cpu/cpufreq [/sourcecode] Now reboot and check for module success: [sourcecode language="python"] cat /sys/devices/system/cpu/cpu0/cpufreq/phc_vids [/sourcecode] If you see voltage numbers then you can start optimizing voltages for your cpu or take mine as reference from the previous post about undervolting.

P.S. Fan almost stops at 40C and starts at 50C.

Written by egaistek

December 27, 2008 at 04:24

Posted in Vaio

Tagged with , , , , ,