I'm having the same problem and I experimented with different packages. g-p-m 2.27.2 and 2.27.1-0ubuntu2 gave the same devicekit-power errors. Downgrading devicekit-power to this fixed it.
https://edge.launchpad.net/ubuntu/+source/devicekit-power/008-1/+build/1057967
I'm having the same problem and I experimented with different packages. g-p-m 2.27.2 and 2.27.1-0ubuntu2 gave the same devicekit-power errors. Downgrading devicekit-power to this fixed it.
https:/ /edge.launchpad .net/ubuntu/ +source/ devicekit- power/008- 1/+build/ 1057967