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** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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  Regression: acpi reports battery state incorrectly after sleep

Status in linux package in Ubuntu:

Bug description:
  On Samsung Series 9 laptops the battery state and the charger status
  are incorrectly reported in kernel 4.15.

  This bug is a regression: it has been fixed in 2012 [1] it used to
  work fine until Linux 14.10 (included).

  Quoting Matthew McCallum from

  > If I disconnect power, remove the back cover, disconnect both the main 
battery and the backup battery, I am able to get power status updates (e.g. 
battery will show as charging/charged when plugged in, or just regular battery 
when not). Once I sleep, I have to repeat this process if I want the battery 
status to work again.
  > `acpi -p` correctly shows the charging state, but `tlp-stat -b` does not.

  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
   /dev/snd/controlC0:  gioele     1939 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 16.04
  HibernationDevice: RESUME=UUID=7e63a512-9a2c-4503-9bd9-ec2f74a7f029
  InstallationDate: Installed on 2017-06-24 (447 days ago)
  InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 900X3C/900X3D/900X3E/900X4C/900X4D
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-33-generic 
root=UUID=696c5d50-d388-4d33-b14a-babf7a7359df ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 4.15.0-33.36~16.04.1-generic 4.15.18
   linux-restricted-modules-4.15.0-33-generic N/A
   linux-backports-modules-4.15.0-33-generic  N/A
   linux-firmware                             1.157.20
  Tags:  xenial
  Uname: Linux 4.15.0-33-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
  _MarkForUpload: True 04/09/2013
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: P07ABK
  dmi.board.asset.tag: Base Board Asset Tag NP900X3D-A03IT
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: 0.1
dmi:bvnPhoenixTechnologiesLtd.:bvrP07ABK:bd04/09/2013:svnSAMSUNGELECTRONICSCO.,LTD.:pn900X3C/900X3D/900X3E/900X4C/900X4D:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP900X3D-A03IT:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: ChiefRiver System 900X3C/900X3D/900X3E/900X4C/900X4D
  dmi.product.version: 0.1
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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