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Why does my computer get less battery life with Ubuntu compared to Windows?

After upgrading from Ubuntu 10.10, my battery life has decreased dramatically.

There was a bug in Ubuntu 10.10 where the Load Balancing Tick and Kworker would interrupt and wake-up the cpu too much, and this wasn't normal. I applied a gnome-power-manager fix back then, following this question, which leads to this bug report, and battery life increased to 3.5 hours.

I'm getting around two hours of battery-life in Natty, and calling Intel's powertop reveals that this bug is back. Is there a fix for Natty yet?

I have a Core 2 Duo ULV, Thinkpad Edge 13

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bbonamin
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    Have you tried using the applications "Jupiter", or "PowerTop"? – Alan May 01 '11 at 02:59
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    My Eee 1005 which was getting 8 hours is only getting something like 3 to 5 hours now, it is horrible. Would going back to Maverick or installing Debian be the only option? – Martin Ueding May 07 '11 at 10:03
  • @queueoverflow, you might want to try the temporary workaround suggested in fossfreedom's answer. – Oxwivi Jun 27 '11 at 06:33

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