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[ubuntu] Debugging terrible battery life HP DV4-1225dx

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linux-howto

http://ubuntuforums.org – Hi all, I'm looking for advice to improve the terrible battery life on my HP DV4-1225dx. I'm running an up to date 11.10. There are a few problems with it: 1) The battery only lasts about an hour on a full charge. 2) Any time I unplug it, ubuntu thinks it's about to run out of battery and hibernates (once it wake it back up, it doesn't complain for ~ an hour). 3) When unplugged, the `present rate` from /proc/acpi/battery/BAT0/state is always 0mA. 4) Powertop doesn't appear to be working. The summary line (even after leaving it running for a few hours) is always: Code: (Hardware)