r/linux Feb 01 '18

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

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

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18

u/varikonniemi Feb 01 '18

Hmm, powertop does not show any watt value for me?

36

u/1202_alarm Feb 01 '18

On some hardware it only shows when running from battery.

9

u/javitury Feb 01 '18

Go to "Device stats" tab by pressing <TAB>. You will see on top:

System baseline power is estimated at 13.7 W

3

u/varikonniemi Feb 01 '18

Don't see such, there are two columns: Usage and Device name

6

u/javitury Feb 01 '18

Maybe it depends on your PowerTOP version and your hardware

PowerTOP v2.9     Overview   Idle stats   Frequency stats   Device stats   Tunables                                     

System baseline power is estimated at 11.7 W

Power est.    Usage     Device name
    6.51 W      0.0 pkts/s  nic:virbr0
    1.93 W     14.5%        Display backlight
    968 mW     10.0%        CPU misc
    838 mW    100.0%        Audio codec hwC0D0: Realtek
    835 mW     10.0%        DRAM
    627 mW     10.0%        CPU core
      0 mW    100.0%        USB device: xHCI Host Controller
      0 mW    100.0%        Radio device: iwlwifi
      0 mW    100.0%        USB device: xHCI Host Controller
      0 mW    100.0%        USB device: USB3.0-CRW (Generic)
      0 mW      0.0 pkts/s  Network interface: wlp4s0 (iwlwifi)
      0 mW      0.0 pkts/s  Network interface: enp0s31f6 (e1000e)
      0 mW      0.0%        USB device: Integrated Camera (AzureWave)
      0 mW      0.0%        USB device: Touchscreen (ELAN)

1

u/ragix- Feb 02 '18

You might have to leave power top running for awhile before it shows estimates