Hi I am new to ubuntu 12.10

After installing ubuntu i installed Power tools since my battery was draining out fast
But, now everytime I boot, I get this error on startup where screen is black... and it says

Speed_dispatcher disabled.
saned disabled
Enabling Laptop mode

SG_IO bad missing sense data.....

And this doesnt allow me to log into ubuntu which i believe loaded well in background...

Any advice from someone who has faced this issue... I have to restart numerous times before it loads correctly