Making battery last longer? Underclocking cpu?

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Re: Making battery last longer? Underclocking cpu?

Post by RobertService » Fri Feb 09, 2018 11:06 am

Speaking of Powertop, there's a gentleman named Hans de Goede of Red Hat who's investigating the OOB (out-of-box) power reductions capabilities of (to?)the Red Hat distribution, Fedora. He has, with not much effort, been able to generate reductions of about 30%. Mr. de Goede is quick to point out that these same figures are typically achievable by the aggressive use of TLP and Powertop after the fact; but he's interested in what his distribution--Fedora--can achieve with no user intervention, i.e., out-of-the-box.
Mr. de Goede presented a talk on his efforts at FOSDEM 2018 in Brussels; you can read about this effort at Michael Larabel--along with a WebM recording of the talk, along with a PDF slide deck.
The title of the Phoronix article is "Fedora's Power Tweaks Dropped The Power Use On A ThinkPad By ~30%."

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Re: Making battery last longer? Underclocking cpu?

Post by prestonR » Fri Feb 09, 2018 4:53 pm

There is a package cpufrequtils in synaptic that adds a taskbar icon that lets you pick your cpu governor/frequency. I usually use it to rack it up to max to avoid cpu stepping on lame hardware but you can of course use it also to tune down. Doesn't survive a reboot though, unless you run it at startup.

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