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    HP ProBook 4330s, Fedora 16

    Discussion in 'HP Business Class Notebooks' started by Maff, May 9, 2012.

  1. Maff

    Maff Notebook Enthusiast

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    Hi,

    I have a HP ProBook 4330s running Fedora 16 64bit. When running Fedora I am getting very poor battery life ~1hr 20min but under Windows 7 I get ~4hrs.

    Dose anyone know of anything I could do to improve battery life when running Fedora?
     
    Maff, May 9, 2012
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  2. ize

    ize Newbie

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    Check this link ubuntu powersaving tweaks where most is usable on any linux distro.

    lesswatts.org is another good resource

    On recent kernels you have to add pcie_aspm=force to the grub boot loader because of device manufacturers lack of following standards.

    Ony my 4530s with intel hd graphics I have quite successfully used this grub boot kernel parameter (using another linux distro):
    pcie_aspm=force i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1 drm.vblankoffdelay=1

    If you have a dedicated radeon graphics card you should check that driver and what powersaving is available.

    Powertop is a good tool to find out what is using power.
    I believe fedora also has laptop-mode-tools package available where you can control devices when running on battery.
     
    ize, May 9, 2012
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