On syslog I read:
May 28 09:46:20 hp850ssd upowerd[1052]: (upowerd:1052): UPower-Linux-WARNING
**: no valid voltage value found for device
/sys/devices/pci:00/:00:14.0/usb1/1-3/1-3.2/1-3.2:1.0/bluetooth/hci0/hci0:11/0005:03F0:044C.0001/power_supply/hid-00:02:76:4f:9b:cb-battery,
I just performed an upgrade to Uuntu 15.04 and started seeing this
issue with my bluetooth mouse HP Touch To Pair Mouse and my HP 850G1
laptop: moreover battery level is too low . Here is output of upower
--dump
Device: /org/freedesktop/UPower/devices/line_power_AC
native-path: AC
