If you ever created a RedHat Enterprise Linux 5 virtual machine using VMware’s ESX you may have discovered that the virtual mouse driver is not installed correctly. The driver is there but they messed up the xorg.conf file.
-A friend of mine found this so I have to give credit to SW on this one-
in the Section “ServerLayout” add InputDevice “Mouse0″ “CorePointer”
then in the Section “InputDevice” add (or create)
Identifier “Mouse0″
Driver “vmmouse”
Option “Protocol” “IMPS/2″
Option “Device” “/dev/input/mice”
Option “ZAxisMapping” “4 5″
Option “Emulate3Buttons” “yes”
EndSection
Reboot and you should be all good.