This is not an issue for me anymore. I'm using kubuntu natty and I tried with recent nvidia and nouveau drivers, so the problem is gone.
Thanks ** Changed in: nvidia-graphics-drivers-180 (Ubuntu) Status: Incomplete => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/400515 Title: kdm starts well but it crashes when trying to restart -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs