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Old 2nd June 2011, 04:39 PM
_lorenzo87_ Offline
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Join Date: Nov 2007
Location: Italy
Age: 29
Posts: 40
Question Power management on fedora 15: poor battery life

hi, just upgraded to f15 x86_64.. i use a VPCCEB3Z1E vaio laptop and i noticed that my laptop can't last more than half past an hour running from battery in wireless productivity (just surfing the net and make some word processing, so nothing so heavy...)

i use kde 4, installed cpupowerutils (replacement for cpufrequtils), put the modules acpi_cpufreq, cpufreq-ondemand -powersave and the other governors in /etc/rc.d/rc.local for loading them at boot..

edited profiles in powerdevil (every profile has cpupowerutils freq-set -g and the name of a governor) but i still notice no changes...

how i can get a better power management on this laptop? fan still runs at high speed

sorry for my bad english and thanks in advice
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Old 2nd June 2011, 11:00 PM
sea Offline
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Join Date: May 2011
Location: Confoederatio Helvetica (Swissh)
Age: 37
Posts: 4,277
Re: Power management on fedora 15: poor battery life


After reading your post at my local time ~ 14:00, i unpluged my laptop from power.
Was watching a movie whiel browsing the forums, so i finshed watching the movie: about 30mins.

However, F15 was claiming to run on low battery just from the moment i unpluged the power.
I ignored that.

For some reason i wanted to reinstall F15 after movie was done, done :P
Copying 7.7gb of a dvd to local drive, wrote a guide, and downloaded like another 1gb mainwhile.

Anyhow, during about 2.5-3h F15 was telling me i'd run on low bat, the time i really had a low bat (less than 25%) it was still running fine, allthough the screen was darkned after like 50% battery power.

Do you experience REALLY low battery life (fast power drain), or do you refer to the error message?

PS: Anyhow, WiFi does eat some amount of power, rather than wired internet which i used.
EFI Cheatsheet :: http://forums.fedoraforum.org/showthread.php?t=298546
Video Handler Script (VHS) (mass re-encode videos, screenrecorder, console music/webradio player, ...) :: http://forums.fedoraforum.org/showthread.php?t=299182
Windows 8+ & Fedora 20+ Dualboot :: http://forums.fedoraforum.org/showthread.php?t=298161
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Old 2nd June 2011, 11:52 PM
nirik Offline
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Join Date: Mar 2009
Location: Broomfield, CO
Posts: 438
Re: Power management on fedora 15: poor battery life

If you have a radeon/ati card, might look at:
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Old 3rd June 2011, 10:33 AM
_lorenzo87_ Offline
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Join Date: Nov 2007
Location: Italy
Age: 29
Posts: 40
Re: Power management on fedora 15: poor battery life

thanks for your answers

i only switched off the laptop when kde said that the battery was going under the 10% of charge, now i'll ignore and stay on the laptop until it goes off..

....and i'll also apply the guide you postedme

thanks again!

edit: waited till my laptop battery was fully discharged... 1h and 23 mins -_- any idea/suggestion? also applied the link posted by nirik

Last edited by _lorenzo87_; 3rd June 2011 at 11:52 AM.
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Old 10th February 2012, 09:12 PM
Dutchy Offline
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Join Date: Aug 2011
Location: ~
Posts: 1,886
Re: Power management on fedora 15: poor battery life

What kind of Graphic card does your laptop have?
When the fan is high but you aren't stressing the processor I bet it is the GPU.
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