Sometimes when I try to suspend my laptop (using the sleep keyboard button), I get this popup from xfce4-power-manager: "Are you sure you want to hibernate the system? An application is currently disabling the automatic sleep. Doing this action now may damage the working state of this application." I don't want to hibernate - I would like to know which application is disabling sleep, so that I can quit it and suspend the system normally. How can I find this out?

I'm on Xubuntu 15.10.

  • 2
    Please don't cross post between sites. askubuntu.com/questions/824583/…
    – cutrightjm
    Sep 13, 2016 at 22:42
  • Deleted cross-post, sorry. (I do wish here and askubuntu weren't confusingly separate.)
    – weronika
    Sep 14, 2016 at 1:12
  • Newer versions of xfce4-power-manager have this information in tray menu.
    – PF4Public
    May 9, 2018 at 15:12
  • @PF4Public Running XUbuntu 18.04 but I don't see this... where exactly should it be showing up?
    – Wil
    Jun 8, 2018 at 17:09
  • 2
    @Wil See this screenshot: imgur.com/TVkO2GC
    – PF4Public
    Jun 13, 2018 at 14:48

1 Answer 1


Under Freedesktop-compliant environments, including XFCE4, sleep inhibition is communicated via D-Bus on the org.freedesktop.PowerManagement bus. I can't find any documentation about this; the xfce4 code has a list of methods which includes one called GetInhibitors so this should work:

dbus-send --print-reply --dest=org.freedesktop.PowerManagement /org/freedesktop/PowerManagement/Inhibit org.freedesktop.PowerManagement.Inhibit.GetInhibitors
  • how to I politely tell the system to ignore the request to prevent suspending, since by preventing suspending, these applications are realizing their own worst nightmare - powerfail - instead of allowing the system to sleep and preserve their consistency when the battery hits 10%.
    – Wil
    Jun 8, 2018 at 17:06
  • @Wil I don't know. Please ask this as a new question. Jun 8, 2018 at 18:02
  • ty, done : unix.stackexchange.com/questions/448702/…
    – Wil
    Jun 8, 2018 at 19:15
  • Using this command I found it was Chrome browser, and specifically a single tab (website) the one blocking the hibernation. Closing that Tab/Web solved the problem.
    – Rub
    Oct 31, 2021 at 10:52

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