I got the following weird problem. Due to some hardware incompatibilities I was forced to switch off my laptop the hard way (pressing the off button). This caused a state in which I was unable to login to mz ubuntu-gnome session. Since my data is save on another partition (and backed up regularly) I decided to just reinstall, this time with normal Ubuntu. However this seems to have not solved the problem. I am still not able to login to my Unity session. I however found out, that I can login to the Unity 8 session, so I assume there is some error in some of the .* folders in my home. However I have no idea where to start looking for the error. Can someone please give me a hint?
To make a long story short. Is there a logfile which tells me what happens during login to the Unity 7 session?