Tagged Questions

2
votes
3answers
79 views

Missed power est. column in powertop?

I used powertop v.2.1 under Ubuntu 12.04 but it missed the power est. column. It's the same situation as described here‎ and that bug is supposed to be fixed already. I tried lm_sensors but it ...
1
vote
1answer
93 views

Integrated webcam on a Dell V131 drains the battery when not used. How to turn it off?

After using the integrated webcam, it never fully turns off and keeps hogging the battery. From powertop: The battery reports a discharge rate of 22.6 W The estimated remaining time is 0 hours, 41 ...
3
votes
1answer
26 views

powertop color codes

I am running powertop in Ubuntu 10.04. It shows a horizontal bar near the top that displays something like: Wakeups-from-idle per second : 723.6 interval: 10.0s My question is, why is the ...
2
votes
1answer
542 views

Battery is drained too quickly

I'm getting really low battery life under ubuntu, not even close to windows. I tried powertop, and I saw that my laptop is consuming in idle nearly 20 watts (a bit more). I tried to install ...
1
vote
1answer
1k views

How can I disable usb-autosuspend for a specific device?

This is related to the issue discussed in this question. Summary: the mouse freezes when operating on battery since it is autosuspended after a certain time and needs more time to wake up. Disabling ...
1
vote
3answers
989 views

Why does battery power drain quicker in Ubuntu compared to WIndows in Dell Inspiron? [duplicate]

Possible Duplicate: Why does my computer get less battery life with Ubuntu compared to Windows? When I used Windows 7 with Dell Inspiron, I got a battery life of 2 hours. But ever since I ...
0
votes
2answers
624 views

How can I disable asus-nb-wmi when using battery power mode?

I'm trying to improve the battery life of my Asus U32U notebook. I'm running Ubuntu 12.04 64bit and using powertop it shows the following: PowerTOP 1.97 Overview Idle stats Frequency stats ...
2
votes
1answer
847 views

Battery time decreased on an HP ProBook 4530s

I have HP ProBook 4530s. In Windows 7 after installing all HP drivers the 6-Cell battery works perfectly for 2+ hours but in Ubuntu 11.10 and now in 12.04 the battery time is not sufficient. It works ...
3
votes
1answer
769 views

Why does powertop think I have two displays?

Ok, so in powertop (version 1.97), in both the "overview" and "device stats" sections, I see two devices, each called "display backlight". One shows the correct percentage of use, e.g. if I lower ...
2
votes
3answers
996 views

Powertop is reporting 0 wakeups/second - can this be right?

I'm investigating tweaking my power consumption performance on Ubuntu. When I run Powertop, the output seems strange, and not much like any of the screenshots I see on the web. That might be ...
2
votes
1answer
512 views

Why shouldn't you enable laptop-mode when on AC power?

I'm looking at ways to reduce the amount of power used by my laptop, and one of the things I came across was enabling laptop-mode. Apparently this is enabled when I'm not on AC power, but I'd like to ...
2
votes
3answers
3k views

Sound system is eating away the battery

In my laptop the sound code is running at 100% even when I am not playing anything. It is causing my palm rest to hit significantly. While I do not face the issue on windows machine where I am using ...
7
votes
0answers
3k views

How to make powertop “Device Power Management” suggestion permanent? [duplicate]

When I run powertop on my laptop I get following suggestion: Suggestion: Enable Device Power Management by pressing the P key Doing this results in considerable saving in power usage and I would ...
3
votes
1answer
4k views

How to enable the CONFIG_PM_ADVANCED_DEBUG kernel configuration option [duplicate]

Possible Duplicate: What is kernel configuration? I'm trying to save the battery power. For that i'm using powertop and one suggestion is "Enable the CONFIG_PM_ADVANCED_DEBUG kernel ...