Hello all,
I have just installed a Slackware 10.1 and i am having a hard time configuring the mouse to work.
I have tried various combinations in xorg.conf for "Protocol" and "Device"
The best i could do was to get the pointer to move only in the Y axis regardless of how i moved the mouse. This was done using the device /dev/input/mice and protocol IMPS/2.
Since the mouse moved, then i guess that /dev/input/mice is the correct device but i have tried all protocols and nothing works.

Note that i have been using XFree86 up to now, and the exact same mouse was /dev/mouse->/dev/psaux and IMPS/2 protocol.

I have also tried to use my last XF86Config, since i read somwhere that xorg is able to work with that, but X crashed.

Any comments would be greatly appreciated since i dont know what else to try!!

Note: When the USB is plugged, /var/log/messages shows:

input0: Microsoft IntelliMouse Explorer USB1:0

i too had problems with mouse when i compiled xorg.
/usr/X11R6/lib/X11/doc/README.mouse was the file i refered and i could fix it. go through it, its an excellent document and i bet you would not have any problems after you have read this. for online version, go here