[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/2029902

Title:
  ASUS laptop stops charging by connect/disconnect loop. Triggered with
  " asus_wmi: Unknown key code 0xcf"

Status in linux package in Ubuntu:
  Expired

Bug description:
  Since upgrading my laptop (Asus X405UA) to lunar this problem started,
  before there were no issues (using the laptop already 5 years with
  every Ubuntu release). I have this problem with chargers that are
  getting old and sometimes have a short moment of disconnect. I can see
  this e.g. also happening in windows.

  The system stops "Charging" and it states the charger is disconnected and 
will be "Not Charging".
  This at itself is not a major issue except that it brings itself in some kind 
of loop between these states. Because of this continuous charging/discharging 
behavior, the battery starts to drain until it is completely empty and the 
laptop has no energy left and turns off.

  If I check dmesg, I see this message for every event it creates a line
  with: asus_wmi: Unknown key code 0xcf

  I was able to resolve the issue with the command:
  sudo modprobe -r asus_wmi --remove-holders

  In dmesg I see:
  ACPI: battery: extension unregistered: ASUS Battery Extension
  asus_wmi: ASUS WMI generic driver unloaded

  and the issue stopped: it then doesn't bring itself into this
  charging/discharging loop anymore that drains the battery

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