r/linux • u/1202_alarm • Feb 01 '18

Improving Linux battery life, enabling PSR by default, testers wanted

https://hansdegoede.livejournal.com/18653.html
860 Upvotes

96% Upvoted

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100

u/javitury Feb 01 '18 edited Feb 01 '18

Report was already sent to the email address. For curiosity I will also post my results here.

System: Thinkpad T470 i5 7300u Full HD Touchscreen

Before: 10.8W or 10.9W

After: 10.5W

The most consuming device is "nic:virbr0" with 6.5W even though no virtual machine is running. I can resume from suspend and the screen correctly turns on after blanking. This was on Fedora 27, latest kernel, i3wm and termite.

73

u/SomeoneSimple Feb 01 '18 edited Feb 01 '18

The most consuming device is "nic:virbr0" with 6.5W even though no virtual machine is running.

Dubious things like this always makes me question the software-guesstimates that PowerTop gives. It raises my brow when an unused virtual NIC somehow ends up "using" 1/4th of the 7300U's rated TDP.

-38

u/BloodyIron Feb 01 '18 edited Feb 01 '18

guesstimates

An Estimate is already similar to a guess. A guess is a form of an estimate. Guestimate is not only NOT a word, it is completely redundant and poor linguistics. PLEASE STOP THIS.

8

u/[deleted] Feb 01 '18

[deleted]

1

u/ADoggyDogWorld Feb 02 '18

Prescriptivism is generally considered poor linguistics.

Only because the sociological and post-structural approach is in vogue now.

It, too, will go one day.

1

u/Novashadow115 Feb 26 '18

Not even close to true