I have a ps/2 mouse but would like to use USB mouse but had the same problem on Inspiron 8100 with USB. PS/2 works though along with synaptics pad. Could you maybe post both solutions? www.linux-knowledge-portal.org/en/content.php?&content/hardware/wessels_sax.html my /etc/X11 (i have two mice :)
Section "InputDevice" Driver "mouse" Identifier "Mouse[1]" Option "Device" "/dev/mouse" Option "Emulate3Buttons" "on" Option "Emulate3Timeout" "50" Option "InputFashion" "Mouse" Option "Name" "Autodetection" Option "Protocol" "imps/2" Option "Vendor" "Sysp" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" Driver "mouse" Identifier "Mouse[3]" Option "Device" "/dev/psaux" Option "InputFashion" "Auto" Option "Name" "Autodetection" Option "Protocol" "ps/2" Option "Vendor" "Sysp" EndSection