Linux C/C++ IDE

Good evening,

been using Geany under Ubuntu since I started studying Business Informatics. Now being in the second semester our classes changed from C to C++ and I found that Geany isn't so good for C++ because it lacks a decent auto-completion (e.g. member functions of STL are not shown).
Does anyone know a light IDE with decent auto completion?

>>10
No u.

>>13
Except when it crashes, which is often. Or when it becomes so slow that it's impossible to type, which is all the time.