I used powertop v.2.1 under Ubuntu 12.04 but it missed the power est. column.

It's the same situation as described here‎ and that bug is supposed to be fixed already.

I tried lm_sensors but it didn't give any voltage reading. Here's a log for sensors-detect and sesnors.

I am uncertain what caused the problem. I am running linux kernel 3.2.0-23-generic, Ubuntu 12.04 distro on Lenovo thinkpad machine.

Are there any other Linux utility to monitor power consumption for different devices?