Nothing happens when I do suspend, reboot to fix

[Thomas Novin]

When I manually do suspend from the top bar, nothing happens. This can happen after it has worked for a number of days.

Then I need to reboot and then it works again.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: gnome-power-manager 3.8.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6
Uname: Linux 3.11.0-13-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: i386
Date: Thu Nov 21 13:36:17 2013
InstallationDate: Installed on 2012-08-03 (474 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
MarkForUpload: True
SourcePackage: gnome-power-manager
UpgradeStatus: Upgraded to saucy on 2013-09-28 (54 days ago)

[Thomas Novin (thomasn80)]

Doing this manually in a terminal did a succesful suspend

$ dbus-send --print-reply --system --dest=org.freedesktop.UPower /org/freedesktop/UPower org.freedesktop.UPower.Suspendmethod return sender=:1.22 -> dest=:1.712 reply_serial=2

[Thomas Novin (thomasn80)]

Doing a shutdown instead of suspend shows a message like attached file, that some application inhibits the shutdown.

So maybe the same for suspend?

So this should be notified to the user.

What application is inhibiting the shutdown in this case, has this request been logged somewhere?