My lid close events started getting detected recently. I have the event
trigger sleep; however, I have to wait approximately 10 seconds after
physically closing the lid before it happens. My configuration is:

-Samsung NP900X4C
-Kubuntu 12.04.2
-Kernel 3.10.4-031004-generic
-BIOS P08ABK

My /etc/default/grub has the following line:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi='!Windows 2012'"

Still, lid open events are not detected no matter how long I wait during
the sleep. The power button has to be pushed in order to wake the
machine up.

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https://bugs.launchpad.net/bugs/986724

Title:
  [Samsung NP900X3B-A01US] Lid state changes not detected

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