Having to use usb mouse, another release and another major bug..
samsung 300V5, appeared in default 12.04 install
For those with similar issues, there was a recent update to 12.04 (yes post release) this upgraded the kernel and headers etc.. so now the touchpad is detected
NOTE : it is detected on this particular laptop as ' ETPS/2 Elantech Touchpad '
hope this helps someone