> 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

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