My Ubuntu freezes my mouse when I'm typing Chinese, and this makes me believe that Chinese Input Method Editor causes this problem. But when I searched for answers, there seem to be many reports of this problem. This morning, I was interrupted by a telephone call when my mouse freezes again, when I return back to my computer, the mouse has already became normal. Next time it happens, I just ignore it, it turns to normal again in couple of seconds.
Lost in the Digital Land, Leaves behind Footprints on the Sands of Time.