[lubuntu] mouse frozen/locked in scroll mode

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http://ubuntuforums.org – Hello, I'm using Lubuntu 12.04 (up to date) on a Samsung netbook N230 and this last month, I had several times my cursor frozen after some time working on my desktop (default LXDE). Cursor is frozen/locked but using trackpad scrolled windows. Keyboard and the system is responding/working normally. I recently reinstalled all the system, still with some configuration files restored (but I checked them) and the problem still happened. One of my suspect files was ~/.config/openbox/lubuntu-rc.xml as I have disabled/enabled some shortcuts (and try to disable the trackpad scrolling) Any (Hardware)