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PowerTOP tops up to 2.1

PowerTOP tops up to 2.1

Posted Aug 30, 2012 17:38 UTC (Thu) by hp (subscriber, #5220)
In reply to: PowerTOP tops up to 2.1 by mjg59
Parent article: PowerTOP tops up to 2.1

sort of what I expected :-/ so in practice I just leave them all set to Bad, there's no way to know.


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PowerTOP tops up to 2.1

Posted Aug 30, 2012 22:04 UTC (Thu) by dlang (subscriber, #313) [Link]

some of them are probably "bad" from a power usage point of view, but "good" from a responsiveness or performance point of view.

which is "correct" for you?

which is "correct" for me?

since the changes don't persist across reboots, you can try them and if you don't notice any downside, set something up to change them for you permanently.

PowerTOP tops up to 2.1

Posted Aug 30, 2012 22:29 UTC (Thu) by hp (subscriber, #5220) [Link]

I'm worried some are bad from a crash/break point of view ... if they are all just perf tradeoffs then a big "fast or battery" button (slider perhaps) could cover it. And save the settings separately according to whether I'm on AC.

Powertop mostly just makes me feel that my OS could have had good battery life but doesn't.

A doc blurb about the tradeoff for each toggle might go a long way though. Or if all of them have a "slowdown" worst case, one global blurb explaining that they're all safe but may cause performance decrease.

PowerTOP tops up to 2.1

Posted Aug 30, 2012 23:00 UTC (Thu) by dlang (subscriber, #313) [Link]

the problem is that in theory these are all safe, but in practice there is buggy hardware and so they are not safe.

So you need to take a risk at some point, and if the system crashes, don't use that option any longer.

These are the sorts of possible problems (along with the performance issues) that make it so that Fedora doesn't default all these things to the most power saving mode.

Some people seem to forget that the best way to have a computer save power is to never buy it in the first place. Computers are purchased to get things done, and that requires using power. How much power should be used depends on how valuable the result is to the person paying for it.

PowerTOP tops up to 2.1

Posted Aug 30, 2012 23:07 UTC (Thu) by hp (subscriber, #5220) [Link]

yeah, that's what I expected :-) thanks for reply.

no way I'm getting near that, basically. would rather just have bad battery life.

PowerTOP tops up to 2.1

Posted Aug 30, 2012 23:21 UTC (Thu) by dlang (subscriber, #313) [Link]

remember, this doesn't last past a reboot, so at most it will result in ONE crash, and it's not very likely to do even that.

PowerTOP tops up to 2.1

Posted Sep 11, 2012 12:15 UTC (Tue) by Jannes (guest, #80396) [Link]

I don't think I ever had a crash, but I have had situations where audio stopped working or it wouldn't come out of suspend cleanly anymore. I'm guessing such subtleties are more common than straight out crashes.


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