Home / ubuntu / Questions / 1304797
Accepted
lucidbrot
Asked: 2021-01-04 12:37:06 +0800 CST

Does upower's CriticalPowerAction=HybridSleep interfere with tlp's recalibrate?

  • 772

The tlp documentation describes tlp recalibrate as follows:

sudo tlp recalibrate [ BAT0 | BAT1 ]
This command works as follows:

  • Resets the charge thresholds to factory defaults 96/100 %
  • Discharges the selected battery completely (see description of tlp discharge above)
  • When discharging is complete the command terminates; it does not wait for the charge to complete
  • Important: to complete the recalibration process, let the battery charge to 100 % subsequently (you may power off but not remove AC power)

I have /etc/UPower/UPower.conf set up to go into HybridSleep at a battery percentage of 3%.

If I want to recalibrate my battery, using sudo tlp recalibrate BAT0, do I have to temporarily disable upower by changing the upower config to as follows? Or does upower not interfere because the battery can still finish discharging while the laptop is in HybridSleep?

UsePercentageForPolicy=true
PercentageAction=0

(This is a follow-up question to the explanations given in What kind of battery management is preinstalled on a clean Ubuntu 18.04 install?)

18.04

1 Answers

  1. Best Answer

    The sleep condition is never met, because the laptop is connected to AC while discharging the battery during recalibration.

    • 2