Bug#747445: plasma-desktop: Buttons "Sleep" and "Hibernate" not working any more after update to 4:4.8.11-1

[Thomas Zoschke <thomaszoschke@aol.com>]

Package: plasma-desktop
Version: 4:4.11.8-1
Severity: important

Dear Maintainer,

The "Sleep" and "Hibernate" buttons used to work propperly before the last update.
Now after pressing any of both buttons, just the screen is locked, no suspend to RAM or hibernate to disk happens.
I can still hibernate and suspend from the shell like this:
$ sudo dbus-send --system --print-reply --dest="org.freedesktop.UPower" /org/freedesktop/UPower org.freedesktop.UPower.Suspend
or
$ sudo dbus-send --system --print-reply --dest="org.freedesktop.UPower" /org/freedesktop/UPower org.freedesktop.UPower.Hibernate

But I'd like to have my buttons working again. Isn't that what a desktop environment is good for?

Thanks for Your attention
TZ

-- System Information:
Debian Release: jessie/sid
  APT prefers testing-updates
  APT policy: (500, 'testing-updates'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.14.2 (SMP w/2 CPU cores; PREEMPT)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages plasma-desktop depends on:
ii  kde-runtime               4:4.12.4-1
ii  kde-wallpapers-default    4:4.12.4-1
ii  libc6                     2.18-5
ii  libkactivities6           4:4.12.4-1
ii  libkcmutils4              4:4.12.4-1
ii  libkdecore5               4:4.12.4-1
ii  libkdeui5                 4:4.12.4-1
ii  libkephal4abi1            4:4.11.8-1
ii  libkfile4                 4:4.12.4-1
ii  libkidletime4             4:4.12.4-1
ii  libkio5                   4:4.12.4-1
ii  libknewstuff3-4           4:4.12.4-1
ii  libktexteditor4           4:4.12.4-1
ii  libkworkspace4abi2        4:4.11.8-1
ii  libplasma3                4:4.12.4-1
ii  libplasmagenericshell4    4:4.11.8-1
ii  libqt4-dbus               4:4.8.6+dfsg-1
ii  libqt4-declarative        4:4.8.6+dfsg-1
ii  libqt4-xml                4:4.8.6+dfsg-1
ii  libqtcore4                4:4.8.6+dfsg-1
ii  libqtgui4                 4:4.8.6+dfsg-1
ii  libsolid4                 4:4.12.4-1
ii  libstdc++6                4.9.0-2
ii  libtaskmanager4abi4       4:4.11.8-1
ii  libx11-6                  2:1.6.2-1
ii  libxext6                  2:1.3.2-1
ii  plasma-widgets-workspace  4:4.11.8-1

Versions of packages plasma-desktop recommends:
ii  kde-workspace  4:4.11.8-1

plasma-desktop suggests no packages.

-- no debconf information