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I have a Samsung notebook with Core i3 Sandy Bridge processor and I want to install the patched kernel available here: https://wiki.ubuntu.com/Kernel/PowerManagement

What Kernel version should I install, Oneiric Ocelot or Precise Pangolin?

What packages should I install? And how should I install them (the easiest way possible, please)?

Additional info: Ubuntu 11.10 x64 with Kernel 3.0.0-14.

Thanks.

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2 Answers 2

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If you follow the link you will find a number of deb packages, that should contain the patched kernel.
The easiest way to install deb package on Ubuntu is:

sudo dpkg -i package.deb

Just download amd64 versions of those packages. Please note that you may want both kernel image and it's headers.

P.S. 11.10 = Oneiric Ocelot

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This will replace the Kernel currently installed and remove the previous? –  Dennis Dec 12 '11 at 22:50
    
No. It will install new kernel keeping the old one. –  Andrejs Cainikovs Dec 12 '11 at 22:53
    
I have installed the Kernel with ASPM fix, but it doesn't make any difference on the battery duration. Thanks for the help anyway. –  Dennis Dec 15 '11 at 4:32
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I seriously wouldn't bother with the kernel as you can get the biggest power saving just by editing your grub configuration. Really this alone was very effective for me on our Samsung laptop (2.5 hours to 4-5 hours).

And by not using a non-standard kernel it means:

  • You'll get security updates automatically.
  • You're not running on untested software.
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Are you sure this is safe? I read in the comments of one post in OMG Ubuntu that apparently this damages the battery in some cases. Here's the link: omgubuntu.co.uk/2011/11/… –  Dennis Dec 12 '11 at 23:12
    
Three people out of hundreds whose batteries started to lose capacity. I've had no problems which is not to say there isn't a problem, just that if it does exist, it hasn't affect me. If it did exist I would be very surprised if it couldn't be fixed by some proper power-cycling. It's quite hard to do permanent damage to a battery by just pulling and pushing current. –  Oli Dec 12 '11 at 23:20
    
I tried the pcie_aspm=force with Grub, according to powertop without it the consumption was 16.4W and with ASPM enabled 15.8W. The difference was minimal. –  Dennis Dec 13 '11 at 0:24
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