4
votes
2answers
986 views

How do you prevent CPUs from being throttled when battery is taken out of Laptop (aka only on AC power)?

My laptop CPUs are throttled down to .8GHz instead of 2.5GHz whenever I am connected to AC only and not the battery. I tried using cpufreq-set and it allows me to set the speed when the battery is ...
41
votes
6answers
10k views

Is system cleanup/optimization needed

Does Ubuntu need regular cleanups like Windows. For example: Cleaning the logs Temporary files Package cache Dependencies left over I am not referring to web browsers only. In case I never do a ...
4
votes
2answers
16k views

How do I turn off PCI devices?

With the purchase of an Intel SSD and 85WHr Li-ion battery and the linking of wifi and bluetooth to my laptop's wireless switch, extensive Intel PowerTop usage, switching from compiz to metacity, ...
9
votes
3answers
13k views

Ubuntu 13.04 CPU frequency scaling 'stuck' on lowest frequency

I've just installed Ubuntu 13.04 on my MacBook Air, after toying around for awhile the machine felt really slow, so I checked out the CPU frequency. cpufreq-info, it reports 800MHz on all 4 cores (...
36
votes
8answers
47k views

How do I make Powertop changes permanent?

I'm on a Compaq 615 and it's fan is loud. Not much you can do about that but I'm trying to keep the CPU/GPU as cool as possible. This is what Powertop has to say: If I change all of them to "good",...
17
votes
6answers
44k views

How can I prevent iwconfig power management from being turned on?

I am affected by this bug: 869502. A workaround which seems to stop the kernel panics for me is to disable wlan0 power management: sudo iwconfig wlan0 power off However it seems to automatically ...
0
votes
1answer
3k views

Ubuntu 14.04 draining battery very quickly

I know there are several other questions very similar to this, but I feel that questions like this are specific to the system you are running and so there is not really a "one size fits all" type of ...
2
votes
1answer
119 views

Energy Saving on Ubuntu PC's (not Laptops!) [duplicate]

Can I use software designed for power saving on laptops on Home PC. (not a laptop) Or maybe someone could suggest alternative tools designed for saving power on PC desktop? What are the other steps ...
146
votes
22answers
166k views

Tips to extend battery life for laptops and notebooks

This question is present as a matter of historical interest. While you are encouraged to help maintain its answers, please understand that "big list" questions are not generally allowed on Ask Ubuntu ...
17
votes
4answers
20k views

Ubuntu 14.04 draining laptop battery quicker than in 12.04 (1 hour versus 4+ hours)

I have recently upgraded to Ubuntu 14.04 on a Lenovo T420 laptop (Corei7-2620M CPU @ 2.70GHz × 4 + Sandybridge Mobile). The battery is now over 2 years old, but under Ubuntu 12.04 it still lasted ...
1
vote
2answers
9k views

Power Savings and Performance Modes on Ubuntu System

This might be the only thing I miss from windows. There is no way to tell the system to run in high performance mode or in power saver mode. May be this feature which is already there and I am ...
2
votes
1answer
245 views

overheating on lenovo ideapad z710; kubuntu 14.04

my problem is that, my laptop is entirely new and it has sensors acpitz-virtual-0 Adapter: Virtual device temp1: +74.0°C (crit = +99.0°C) temp2: +74.0°C ...
0
votes
1answer
5k views

Ubuntu 13.04 - High temperature [duplicate]

I've always used Ubuntu. I installed the version (13.04) and I have a problem: the CPU's temperature is high also in normal condition. This is the response of lm-sensors: acpitz-virtual-0 Adapter: ...
4
votes
1answer
935 views

Why is Ubuntu so power-inefficient? [duplicate]

Possible Duplicate: Battery drain on ubuntu is fast I'm currently getting 7–8 hours of battery life whilst using Windows, but I only get about 3 hours in Ubuntu? Why the big gap? Some ...
0
votes
1answer
172 views

Ubuntu 15.04 on laptop - “When plugged in” setting not enforced after battery is charged to 100%

I got Ubuntu 15.04 running on a Dell 3147. Under Power settings, I have When plugged in set to Don't suspend. It seems that after the battery has reached 100% it no longer honors this setting, instead ...

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