Hello I have experience similiar problem with the USB mouse.But in your question I don't know what the X environment you use? KDE or Gnome? and when the "mouse freezing" problem happens? The linux version I use is Centos 4.4. And I meet the problem when the K Desktop screensaver stops.I think it is associated with the KDE screensaver program. For me,I can avoid this by one of the two following methods: 1.Using the Gnome Desktop Environment. 2.With KDE,avoid using KDE default screensaver,replace it with the "xscreensver". -- Zhenhua Lin Candidate for PhD College of Physical and Environmental Oceanography Ocean University of China 238 Songling Road Qingdao, CHINA 266100