lid.sh does quite a few things, but with Unity, without xscreensaver, and with 
an intel card, it basically does this when closing the screen:
xset dpms force off

and when opening the screen:
xset dpms force on

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You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to mesa in Ubuntu.
https://bugs.launchpad.net/bugs/966744

Title:
  Resume from suspend leaves me with black screen or a screen of the
  desktop before it suspended (though the mouse still moves/changes
  cursor)

To manage notifications about this bug go to:
https://bugs.launchpad.net/compiz/+bug/966744/+subscriptions

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