> keyboard works great. However, the mouse behaves erratically. Every
You should post the relevant portion of your /etc/X11/xorg.conf.
Most likely you'll need to find the right incantation for the line:
My protocol was IMPS/2. Just changed it for PS/2, but results are the same.
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "PS/2"
Option "Device" "/dev/input/mouse0"
Option "ZAxisMapping" "4 5"
Option "Emulate3Buttons" "no"
EndSection
BTW the problem is present both in text and X. I have been able to reproduce it very easily in vim while in insert mode.
I'm going to test the mouse on Windows tomorrow.