Linux PHC for Ubuntu 10.04 Lucid Lynx

Today I have officially published the PHC kernel for Ubuntu 10.04 Lucid Lynx. The Linux PHC project provides cpufreq kernel modules for undervolting Intel and AMD processors on a Linux platforms. This gives you the ability to save energy, lower the CPU temperature and expand battery time.

If you want to know more about Linux PHC take a look at the Linux PHC forum and the PHC wiki. The installation notes for the PHC kernel are in this thread.

Comments on this Article

  • Alessandro Curci says:

    David, really many thanks for publishing a PHC patched kernel, but please have a look at this issue: diffing ubuntu’s standard kernel headers with PHC PPA reveals that there are some important files missing in PHC, and these are needed to compile some drivers.

    cd /usr/src
    diff -qr –brief linux-headers-2.6.32-22-generic linux-headers-2.6.32-22-generic-phc | sort


    Only in linux-headers-2.6.32-22-generic/arch/x86/kernel: asm-offsets.s
    Only in linux-headers-2.6.32-22-generic/include/asm: asm-offsets.h
    Only in linux-headers-2.6.32-22-generic/include/asm-x86: asm-offsets.h
    Only in linux-headers-2.6.32-22-generic/include/linux: bounds.h
    Only in linux-headers-2.6.32-22-generic/kernel: bounds.s
    Only in linux-headers-2.6.32-22-generic-phc: .config.old
    Only in linux-headers-2.6.32-22-generic-phc/include/config/acpi/custom/dsdt: initrd.h
    Only in linux-headers-2.6.32-22-generic-phc: modules.order
    Only in linux-headers-2.6.32-22-generic-phc/scripts/basic: modules.order

  • David says:

    Thanks for reporting this. I never compared it in that way until now.
    I looked into this while building the new kernel for 10.10 Maverick, but I couldn’t reproduce your findings with the latest versions. (2.6.32-25.44~phc0 for 10.04 Lucid and 2.6.35-22.33~phc0 for 10.10 Maverick)
    I suspect that only the specific version was broken or something other went wrong. If you still experience similar problems then please notify me again.

  • bigley says:

    hi, I am currently running 2.6.32-31-generic-phc thanks to your repository. The thing is some newer kernels have come out for 10.04 when I hit update, but obviously those are not phc kernels. Now I have to force grub to loading the older phc kernel. Was wondering if there will be any updated phc kernels for 10.04, as newer kernels sometimes have bug fixes etc?

    • David says:

      Sorry for the huge delay in kernel updates. New kernels for Natty, Maverick and Lucid are currently bulding, so you will find up-to-date kernels in the PHC PPA soon.

  • danang dk says:

    thx for PHC kernel, i use 2.6.32-33 generic pae phc, the temp is 15 degrees lower. very nice. but i always love RT kernel, and the best i think from KXStudio. Will you add another custom kernel for PHC+RT support?? I will appreciate it. If u don’t have spare time to do, i need help to build my own PHC kernel. i had been created custom kernel before ( and with your custom PHC source may be i can make a custom PHC+RT support. Drop me email if u want to share the step to compile PHC kernel. Thank u very much.

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