Battery Charging problems in Ubuntu 12.04

[Jatin]

Hi All

Not sure if this is a problem with ubuntu or the hardware.

-- When i have power plugged in the laptop and if ubuntu is not turned 
on then the battery gets charged fine , no problems here.

-- When the battery is getting charged and if i start ubuntu then the 
battery stops charging and it is the battery power that gets used for 
running ubuntu. This is not fine.

-- Sometime i have the battery getting charged and at the same time 
ubuntu also is running but suddenly the charging goes off and it starts 
using the battery power. In this case i have to unplug and plug in the 
power adaptor for nearly 50 times so that the battery starts charging again.

Appreciate your help in this regard.

Thanks
Jatin