Thanks, you pointed me into right direction. I had systemd installed, but it's inactive by default - pid 1 was init. When I rebooted adding init=/bin/systemd to grub kernel line, suspend/hibernate options are back in KDE menu. Also querying o.fd.PowerManagement for CanSuspend currently returns true.
So as suggested, the real question is, should it also work using traditional systemv init? I'm attaching output of requested reportbug commands: Package: libsolid4 Version: 4:4.12.4-1 Versions of packages libsolid4 depends on: ii libc6 2.18-5 ii libqt4-dbus 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 libstdc++6 4.9.0-2 ii libudev1 204-10 ii udev 204-10 Versions of packages libsolid4 recommends: ii udisks2 2.1.3-1 ii upower 0.99.0-2 Versions of packages libsolid4 suggests: pn media-player-info <none> -- no debconf information Package: kde-workspace-bin Version: 4:4.11.8-1 Versions of packages kde-workspace-bin depends on: ii iso-codes 3.53-1 ii kde-runtime 4:4.12.4-1 ii kde-style-oxygen 4:4.11.8-1 ii kde-workspace-data 4:4.11.8-1 ii kde-workspace-kgreet-plugins 4:4.11.8-1 ii kscreen 1.0.2.1-1 ii libc6 2.18-5 ii libcln6 1.3.3-1 ii libdbusmenu-qt2 0.9.2-1 ii libfontconfig1 2.11.0-5 ii libfreetype6 2.5.2-1 ii libgcc1 1:4.9.0-2 ii libgl1-mesa-glx [libgl1] 10.1.1-1 ii libice6 2:1.0.8-2 ii libjpeg8 8d-2 ii libkactivities6 4:4.12.4-1 ii libkcmutils4 4:4.12.4-1 ii libkdeclarative5 4:4.12.4-1 ii libkdecore5 4:4.12.4-1 ii libkdesu5 4:4.12.4-1 ii libkdeui5 4:4.12.4-1 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 libknotifyconfig4 4:4.12.4-1 ii libkparts4 4:4.12.4-1 ii libkpty4 4:4.12.4-1 ii libkscreensaver5 4:4.11.8-1 ii libkworkspace4abi2 4:4.11.8-1 ii libnepomukcore4 4:4.12.4-1 ii libpam0g 1.1.8-3 ii libphonon4 4:4.7.1-1 ii libplasma3 4:4.12.4-1 ii libplasmagenericshell4 4:4.11.8-1 ii libpng12-0 1.2.50-1 ii libprocesscore4abi1 4:4.11.8-1 ii libprocessui4a 4:4.11.8-1 ii libqalculate5 0.9.7-9 ii libqimageblitz4 1:0.0.6-4 ii libqjson0 0.8.1-3 ii libqt4-dbus 4:4.8.6+dfsg-1 ii libqt4-declarative 4:4.8.6+dfsg-1 ii libqt4-sql 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 libsm6 2:1.2.1-2 ii libsolid4 4:4.12.4-1 ii libsoprano4 2.9.4+dfsg-1 ii libstdc++6 4.9.0-2 ii libstreamanalyzer0 0.7.8-1+b1 ii libudev1 204-10 ii libusb-0.1-4 2:0.1.12-23.3 ii libx11-6 2:1.6.2-1 ii libxcursor1 1:1.1.14-1 ii libxext6 2:1.3.2-1 ii libxfixes3 1:5.0.1-1 ii libxft2 2.3.1-2 ii libxi6 2:1.7.2-1 ii libxinerama1 2:1.1.3-1 ii libxkbfile1 1:1.0.8-1 ii libxrandr2 2:1.4.2-1 ii libxrender1 1:0.9.8-1 ii libxtst6 2:1.2.2-1 ii phonon 4:4.7.1-1 ii plasma-desktop 4:4.11.8-1 ii qdbus 4:4.8.6+dfsg-1 ii x11-utils 7.7+1 ii x11-xserver-utils 7.7+2 Versions of packages kde-workspace-bin recommends: pn plasma-scriptengines <none> ii policykit-1-gnome 0.105-2 ii polkit-kde-1 0.99.1-1 ii upower 0.99.0-2 Versions of packages kde-workspace-bin suggests: ii x11-xkb-utils 7.7+1 -- no debconf information Regards Paweł
