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I have noticed that the way my laptop (Dell XPS 13, Ubuntu 16.04, Unity) suspends when I manually order it to (i.e. via the graphical interface or terminal command sudo pm-suspend) is different from the suspension which happens when I close the lid. The most notable difference is that the power button continuously flashes in the second case, but goes completely dark in the first case. Besides that, I think wake-up time is also ever so slightly higher in the lid-close case, but I'm not 100% sure. I'd like to know why these two distinct suspension modes exist at all.

Bib-lost
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  • Which version of Ubuntu are you running? And, which desktop? Unity/Gnome/LXDE etc? Finally, what result do you get from running sudo pm-suspend? Same as using the GUI or same as closing the lid? – Delorean Mar 20 '17 at 20:27
  • I added the requested information. On retrying suspending using terminal and GUI, my network manager still breaks down with this suspension mode. Hence I have removed that part of the question so that it's now only about the two suspension modes (and purely out of curiosity). – Bib-lost Mar 20 '17 at 21:40
  • Start by reading man pm-action;man pm-is-supported – waltinator Mar 20 '17 at 21:44

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