I solved the problem : on a fresh installed VM i reproduced the steps mentioned in the guide (link provided by vadim) and this time it worked. i guess that i missed up something the last time.
-- virtualbox additions https://bugs.launchpad.net/bugs/346754 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
