12.04 freeze frequently, may be related to mouse

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http://askubuntu.com – My Ubuntu12.04 often appears stuck - mouse, keyboard, all did not respond, everything stopped. I tried all methods to prove that indeed is a very serious problem. I know many people are like me, unfortunately, this problem still exist in 12.10. I think the two most suspicious: 1 mouse. I do not use the mouse (I use the laptop touchpad), and never had problems. I replaced a lot of mouse, but to no avail, as long as using the mouse, will such a situation occur from time to time. 2 USB. If it is not the mouse, it may be a USB problem. I use the mouse is a USB mouse. This problem is not caused b (HowTos)