Yesterday, i’ve updated my desktop computer from Ubuntu 11.04 Natty to 11.10 Oneiric. But after system reboot, it stuck on “checking battery state”. After some googling, i’ve found a solution on a comment by Josh.C in here.

This issue was resolved for me by running the following command at a command prompt (ssh, or Ctrl+Alt+F1):

sudo apt-get install lightdm-gtk-greeter

Apparently the upgrade didn’t bother to install the greeter for LightDM, so it fails to fully initialize.

 

And it’s works!! 🙂