I just installed Ubuntu 13.10 on my Samsung 305u notebook.
The problem is that the touchpad (cursor and clicking) doesn't work, it does nothing. The only way to fix it is to plug an external mouse, which isn't the optimal. I already checked the system preferences and the touchpad is enabled.
I used Ubuntu 13.04 before, and it worked. Then I installed Linux Mint and the touchpad stopped working, that's way I installed 13.10, but now it doesn't work here either.
I hope someone can help me.