Systeminfo and batteryinfo

[bird12358]

Hello,

I would like to know the remaining capacity of my computer battery. So I install the Mobility module named systeminfo.
I use it on ubuntu 12.04 (Qt 4.8.4). I compile the example given in the module.
On the battery part, all the informations is at 0 or -1. I thought I had to be as root to get the informations.
Unfortunatly this is not the cause of the problem.

Do I have to install an other module or a package on ubuntu to be able to get informations?

Best regard.