Comment 3 for bug 1516255

I am also getting the same error when i am trying to start the session . lightdm-gtk-greeter is not starting up.

I got into this after updating the ubuntu from 15.04 to 15.10.

lightdm-gtk-greeter: symbol lookup error: /usr/lib/x86_64-linux-gnu/libmirprotobuf.so.3: undefined symbol: _ZNK6google8protobuf11MessageLite25InitializationErrorStringB5cxx11Ev
I am getting this error while starting the session.

I just bypassed the login by typing lightdm-session in console.(I am able to open the console ).But some apps are not able to open up due to this problem

Somebody please tell me how to fix this issue.