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Old 10-26-2011, 09:43 AM   #1
joboy
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Power saver


Hi there,

I am running Ubuntu 11.10, I found it is very power hungry, my notebook battery can last up to 3hrs. with previous version, but now barely enough for an hour. I installed a CPU scaling applet on previous version, which effectively scale down the clock rate, but I can't find similar app for this version, now when I put my hand next to the cool fan, I feel the burning heat from the notebook, it seems the CPU is running at full clock rate all the time !! I need an effective power saver, simple dim the screen is no use, and make it hard to read things, ok my battery is dying got to go...
 
Old 10-27-2011, 11:40 PM   #2
widget
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This is a common problem with 11.10 and is likely to stay that way.
 
Old 10-28-2011, 12:08 AM   #3
joboy
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Yeah, the previous version is better, and I can install an applet to control the clock rate, but now I've to look for other ways. Now I just 'go back' to Kubuntu, it has better widgets and there is one to control the CPU clock.
 
Old 10-28-2011, 12:26 AM   #4
John VV
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It is a known bug in the recent and current kernels

hopefully it will be fixed in the next 6 months or so .
 
Old 10-28-2011, 12:32 AM   #5
joboy
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That's a pity, every new version got something new, good and bad, as someone said "if it ain't broke don't FIX it" !
 
Old 10-28-2011, 01:15 AM   #6
John VV
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some reading
"An Update On The Linux Power Situation In Ubuntu"
http://www.phoronix.com/scan.php?pag...inux_epb&num=1

Though this is not a Ubuntu only issue
 
Old 10-28-2011, 02:23 AM   #7
joboy
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Thanks, but I keep updating everyday never stop, it is already kernel 3.x but didn't change thing, now I running Kubuntu and installed a CPU clock widget, I turn down it to powersave mode manually, the notebook now running cooler, but I still miss the old applet on Ubuntu that can control the clock rate on demand, this is the best way to do thing
 
Old 10-28-2011, 11:02 AM   #8
salasi
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Here is an alternative analysis of the power issue, but, be aware that the main disagreement with Phoronix is that it is argued that the use of the word regression (or, indeed, bug) in this situation is in error. So, you could say that this argument is mere semantics, but if the use of words leads you to the wrong actions...

The applets here and here might actually be of some use, but I have no idea whether either can be made to function with your distro, or to what extent they improve the situation. But if you do try, it would be worth posting back to keep us informed of your progress.
 
Old 10-28-2011, 12:16 PM   #9
SecretCode
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These are the search terms you are looking for: unity indicator cpu frequency - Google Search ...

CPU Frequency Scaling applet in Unity *|*Ubuntu Geek
11.04 - CPU Frequency Scaling in Unity? - Ask Ubuntu - Stack Exchange --> unity - List of Application indicators - Ask Ubuntu - Stack Exchange

The next three hits also point to the same thing afaics:

Code:
sudo add-apt-repository ppa:artfwo/ppa
sudo apt-get update
sudo apt-get install indicator-cpufreq
 
  


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