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I have a Samsung series 5 ultra (np530U4c - ivy bridge/Nvidia version).

The machine won't suspend on lid closing.

I has worked on fresh install. After it I added "pcie_aspm=force i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1" to grub defaults.

After It the suspen not worked anymore. ...Neither with extra params nor without them.

I think the kernel switched off the lid closing detection, because it won't work on windows too.

How can i fix this?

My laptop bricked and the service changed the mother board so I got this problem twice.

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These kernel bug reports are related to your issue:

According to the information in those reports, you can temporarily fix your problem by doing the following:

  1. Power the computer down
  2. Remove AC plug
  3. Cut the battery power (it's a small hole on the bottom of the device, hold pressed for 5-10 seconds)
  4. Plug AC power in before you power the device on

However, the problem will return next time you boot Ubuntu until those bugs are fixed.

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