openSUSE 42.1 Leap with latest plasma/kde frameworks from obs. My pc has two monitors attached to it.

On the Energy Saving tab in System Settings->Power Management I've unchecked all options except for "Screen Energy Saving" which is set to switch off after 90 min.

Despite this the monitors never switch off,  even when I lock the screen.

$ rpm -qa | egrep "kdm|plasma|framework|powerdevil"| sort
frameworkintegration-plugin-5.18.0-89.1.x86_64
kdm-4.11.22-1.7.x86_64
kdm-branding-openSUSE-42.1-6.1.noarch
patterns-openSUSE-kde_plasma-20150918-12.1.x86_64
plasma5-addons-5.5.4-79.1.x86_64
plasma5-addons-kimpanel-5.5.4-79.1.x86_64
plasma5-addons-lang-5.5.4-79.1.noarch
plasma5-desktop-5.5.4-136.6.x86_64
plasma5-desktop-branding-openSUSE-13.3-112.1.x86_64
plasma5-desktop-lang-5.5.4-136.6.noarch
plasma5-pa-5.5.4-28.1.x86_64
plasma5-pa-lang-5.5.4-28.1.noarch
plasma5-pk-updates-0.2-6.2.x86_64
plasma5-pk-updates-debuginfo-0.2-6.2.x86_64
plasma5-session-5.5.4-57.1.noarch
plasma5-workspace-5.5.4-166.1.x86_64
plasma5-workspace-branding-openSUSE-13.3-112.1.x86_64
plasma5-workspace-lang-5.5.4-166.1.noarch
plasma5-workspace-libs-5.5.4-166.1.x86_64
plasma5-workspace-wallpapers-5.5.4-52.1.noarch
plasma-framework-5.18.0-98.1.x86_64
plasma-framework-components-5.18.0-98.1.x86_64
plasma-framework-lang-5.18.0-98.1.noarch
plasma-framework-private-5.18.0-98.1.x86_64
plasma-nm5-5.5.4-94.2.x86_64
plasma-nm5-lang-5.5.4-94.2.noarch
plasma-nm5-openconnect-5.5.4-94.2.x86_64
plasma-nm5-openvpn-5.5.4-94.2.x86_64
plasma-nm5-pptp-5.5.4-94.2.x86_64
plasma-nm5-vpnc-5.5.4-94.2.x86_64
powerdevil5-5.5.4-70.1.x86_64
powerdevil5-lang-5.5.4-70.1.noarch
python-kde4-plasma-4.14.3-2.11.x86_64


Reproducible: Always

Steps to Reproduce:
1. Open System Settings->Power Management
2. Uncheck all options.
3. Check Screen Energy saving and set it to switch off after 90 min

Actual Results:  
The screens never switch off

Expected Results:  
The screens go into power save mode after 90 min (how it worked in openSUSE 13.2 with KDE 4.x)