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I've been reading this question, and I'm wondering what is the procedure for suspending in KDE? Whether to RAM or to disk..

When I click suspend, or close the lid, what gets triggered? What is the chain of events that lead to a certain program getting executed? Thank you.

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KDE has a device integration framework called Solid.

You can see the API documentation for it here: http://api.kde.org/4.14-api/kdelibs-apidocs/solid/html/index.html

When you click suspend, solid sends a dbus message to Upower (http://upower.freedesktop.org/), the underlying framework, requesting a suspend.

You can simulate a suspend from the command line by doing

 qdbus org.kde.Solid.PowerManagement /org/freedesktop/PowerManagement Suspend
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