Comment 23 for bug 1407152

Don't know, if this is the same bug. I'm using the final version of Kubuntu 15.04 (all published updates installed) - it's impossible to shutdown the pc properly. I get a black screen but it isn't switched off. So I have to switch it off manually and I'm scared about data on my possibly still mounted drives... Ctrl+Alt+F1 doesn't work. I think, keyboard doesn't accept anything at all (e.g. caps lock).

Hypernating is quite unstable - maybe it's related to this, maybe not, maybe this could be a hint for a systemd issue. I tried to hibernate 3 times:
1st time: didn't switch off at all - only the screen flickered and was locked afterwards
2nd time: switched off, but then switched on instantly
3rd time: switched off, but when I returned 1hr later, the computer was running, but it didn't respond.

I've had none of these problems in Kubuntu 14.10 or 14.04...