Dear Friends, Serial mouse is working ok during installation and upgradw but doesn't work after starting up. I changed the /etc/X11/xorg.conf file to : Section "InputDevice" Identifier "Mouse1" Driver "mouse" Option "Protocol" "Microsoft" Option "Device" "/dev/mouse" EndSection This works on another computer at my work place. I also used "/dev/stty0" with no go. The mouse works in Windows and it works during dvd upgrade and install process. Any suggestions please!!! Thank you all.