BT mouse sleeps too often

Wed Apr 15 11:54:01 UTC 2015

My Bluetooth mouse goes to sleep after a few minutes of inactivity. The
light doesn't go off so I assume it's not the mouse itself. It takes
about 5 seconds or so of jiggling to get the screen cursor to reappear.

The kernel modules are:

bluetooth             486193  37 bnep,hidp,btusb,rfcomm

and they don't change during this whole process.

Where can I look for something to tweak to change this? I'm using KDE
Plasma5 on F21, if it's relevant (but I suspect it's not).

poc