I have a Lenovo Y460p running Ubuntu 12.04 (64-bit). The battery does charge normally, but unplugging the power supply only very briefly shows the correct battery indicator. After about 1 second, it reverts to the charging indicator.
If the power supply is connected the power statistics show:
If it is not connected it shows:
My problem is almost exactly like the one in this post:
Ubuntu 11.10 power management does not recognize removal of power supply
The only exception is that my system does not dual-boot with Windows. This is Ubuntu only. The computer in the other post is a Lenovo as well; not sure if that has anything to do with it.
Any help would be greatly appreciated. Thanks.