I’m running VMware Workstation 6.5 under Windows Vista. I have Ubuntu 8.04 installed. I found a tip on how to enable the mouse scroll wheel, but I found that it switched my mouse over to Ubuntu control. That is to say, my mouse acceleration changed, and I was no longer able to seamlessly move my mouse out of the VMware window.
In the end, it turns out to be critical that VMware Mouse be retained as the input device identifier in /etc/X11/xorg.conf:
Section "InputDevice" Identifier "VMware Mouse" Driver "vmmouse" Option "CorePointer" Option "Device" "/dev/input/mice" Option "Protocol" "ImPS/2" Option "Buttons" "5" Option "ZAxisMapping" "4 5" EndSection
