I have had this problem as well, but am not able to reproduce. I've attached a screenshot showing the precise area that caused problems for me on this occasion by using GIMP to draw dots where I could around it. In this case (and for a 1920x1080 screen) it was the area within (420,434)-(1513,699) but outside of (428,441)-(1506,652) (specificied by the pixels immediately outside of each bounding box).
** Attachment added: "Screenshot of dead area" https://bugs.launchpad.net/ubuntu/+bug/773533/+attachment/2109535/+files/Mouse%20dead%20areas.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/773533 Title: Mouse Dead Spots -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
