Mouse cursor snaps to same position
I started having a strange problem with the mouse cursor. I started the computer, the mouse worked fine as always. Suddenly the cursor started fixating on a point on the lower right portion of the screen. I would move the cursor, it would move maybe halfway across the screen for a split second and then snap right back to the starting position.
I tried shutting down the computer and restarting. Didn't help. The cursor behaves the same way in the login screen too. The only difference is that now the "homing position" is somewhere in the upper right part of the screen.
I have a Kensington Expert trackball and a Magic Trackpad. I've removed the trackpad, in case it had started interfering with the trackball (never done that before though). Didn't help. I've unplugged and replugged the trackball USB-cable, no help.
Any ideas what is going on? I haven't yet checked the mouse settings in the system panel, a bit hard to get there with no mouse and I haven't yet figured out the key-combination to open the settings.
I tried shutting down the computer and restarting. Didn't help. The cursor behaves the same way in the login screen too. The only difference is that now the "homing position" is somewhere in the upper right part of the screen.
I have a Kensington Expert trackball and a Magic Trackpad. I've removed the trackpad, in case it had started interfering with the trackball (never done that before though). Didn't help. I've unplugged and replugged the trackball USB-cable, no help.
Any ideas what is going on? I haven't yet checked the mouse settings in the system panel, a bit hard to get there with no mouse and I haven't yet figured out the key-combination to open the settings.
Apple Mac Pro, Mac OS X (10.6.6)
