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I upgraded the Xubuntu on my Samsung laptop using the update utility and now the screen goes blank but does not turn off if I leave it idle on battery. I get the error "sleep verb not supported".

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    Possible duplicate of Hibernate – stumblebee Jan 25 '18 at 18:02
  • I'm not concerned with hibernation. – Reza Jan 25 '18 at 19:30
  • Where is the error "sleep verb not supported" coming from? logfile? command? – stumblebee Jan 25 '18 at 19:45
  • It shows in a "balloon" on top right of the screen when I press a key and the (blank) screen saver goes away. – Reza Jan 25 '18 at 23:37
  • Is secure boot enabled in the bios? What are the stats on "MEM" and "SWAP" when you run top -n 1 – stumblebee Jan 26 '18 at 16:53

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