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[juanmanuel <rockerito99@xxxxxxxxx>]

> If so, could you please test for this with the latest development
release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ .

I downloaded  trusty-desktop-amd64.iso    from that link, and tested
with my Series 5 NP530U3C, and the issue still persist in the latest
ubuntu. So, latest ubuntu is the same.

Here is what I did:
     1) Downloaded ISO image
     2) Put it in a 2GB pendrive using 'unetbootin' to transfer it there.
     3) Booted up, selected "Try ubuntu without installing".
     4) Started acpi_listen, I see that plugging and unplugging are recognized as events.
     5) Suspended the laptop by closing the lid.
     6) Unplugged, plugged, unplugged..... (8 actions or more) while suspended. 
     7) Resumed from sleep.
     8) ----> Now events are NOT produced anymore and the laptop got into "problem state". <----
          Closing the lid doesn't suspend the laptop. The battery icon says charging even though the ultrabook is unplugged from the wall.

No surprise there. Still UNFIXED in latest ubuntu (the ISO file has a
date of 2014-02-22 in that download site).

Another way to get the laptop into "problem state" would be to let it
discharge or charge by 16% while suspended in S3 sleep.

Christopher: 
Should I file a new bug report?
--
Juan Manuel Cabo

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https://bugs.launchpad.net/bugs/971061

Title:
  acpi reports battery state incorrectly

Status in “linux” package in Ubuntu:
  Won't Fix

Bug description:
  I have a new Samsung 9-series laptop (NP900X3B) and the battery state
  is detected incorrectly. Basically the state what was at the time of
  boot stays active all the time - regardless of the ac-adapter state.

  Here is output from "acpitool -a -b" in various situations:

  When booted with charger connected and charger is still connected:
    Battery #1     : charging, 47.00%, 01:00:43
    AC adapter     : on-line 
   
  When booted with charger connected and charger is now disconnected:
    Battery #1     : charging, 47.00%, 01:36:59
    AC adapter     : off-line 
  [The battery couldn't possibly be charging when the AC adapter is offline!]

  When booted with charger disconnected and charger is still disconnected:
    Battery #1     : discharging, 47.00%, 01:39:44
    AC adapter     : off-line 

  When booted with charger disconnected and charger is now connected:
    Battery #1     : discharging, 47.00%, 00:53:43
    AC adapter     : on-line 
  [The battery is actually charging as the AC adapter is online]

  The percentage and time are correctly updated when the battery is
  actually charging or discharging - regardless of the reported state.
  So the state is the only thing that is incorrect. However a number of
  applications make their decisions based on this state (battery
  monitor, jupiter, etc.) and therefore behave incorrectly.

  "lshal -m" doesn't report anything when I plug the charger in or out.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: acpi (not installed)
  ProcVersionSignature: Ubuntu 3.2.0-21.34-generic 3.2.13
  Uname: Linux 3.2.0-21-generic x86_64
  ApportVersion: 2.0-0ubuntu2
  Architecture: amd64
  Date: Sun Apr  1 22:50:35 2012
  EcryptfsInUse: Yes
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328)
  ProcEnviron:
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: acpi
  UpgradeStatus: No upgrade log present (probably fresh install)

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