Ubuntu – High power consumption through btusb and tick_sched_timer


Recently I noticed that my laptops battery is very worse so I checked powertop for the power consumption.
Doesn't matter what I do. The the top processes are

Radio device: btusb

Together they consume almost 15-17 W of power.

What are these services and how can I fix this issue. My laptop is a Precision 5530 from Dell.

Best Answer

  • If you are not using bluetooth (higher power consumption) you can simply turn it off.

    To turn off bluetooth only temporarily, use rfkill:

    $ sudo rfkill block bluetooth

    To permanently turn off bluetooth create a udev rule:

    $ sudo -H gedit /etc/udev/rules.d/50-bluetooth.rules

    Then in the empty file, insert these lines:

    # disable bluetooth
    SUBSYSTEM=="rfkill", ATTR{type}=="bluetooth", ATTR{state}="0"

    Save the file and exist.

    Visit the link above for even more power saving tips.