I've found that apparently it's not happy with the Nvidia GeForce GT 330M hardware. When I originally tried Sabayon on this new laptop, I installed the 32-bit Gnome version, and it ran right out of the box - sweet. Called up the Nvidia splash screen, ran in full resolution mode, Compiz ran like a dream.
Now I've wiped the installation and tried to install the 64-bit version. I did eventually manage to get the KDE install done by adding "xdriver = nvidia" to the boot options, booting the normal desktop environment, and running the installer from the live CD desktop. However, the screen resolution was a disaster at 1024x768 with aspect ratio distortion, so I selected to install the Nvidia drivers from the package manager. I did this, rebooted the machine, kernel version now said .35, and system hangs after loading network manager and a few other things... I presume this would be the point where it would try and load the Nvidia driver.
Any clues on how I get around this issue? I really don't want to be stuck running the 32-bit Gnome version on this machine.