Ubuntu – Ubuntu 12.10 hangs on checking battery state

Answer from the OP:

We installed lightdm and it showed similar behavior, i.e. it halted at a certain step.

However, then it was possible to press ctrlaltF1 and then login. The problem that there was the existence of /etc/init/lightdm.override. Inside the file was the word manual.

This was how it was present on install of lightdm, and then running 'sudo dpkg reconfigure lightdm'. Upon removing this file the system went to the login screen with no problems!

I have Lenovo Legion Y540 and I faced the same problem. To fix this there was a option in my BIOS to change from discrete graphic to switchable graphics and that the did the trick for me.