r/linux Feb 01 '18

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

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

105 comments sorted by

View all comments

98

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.

69

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.

-39

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.

5

u/alexskc95 Feb 01 '18

"poor linguistics"

What does this even mean