When i used Sabayon for the first time, i had aproblem with accleration, Compiz etc...
I solved tihis, in my machine int htis manner:
Please, log the session as route.
in a prompt ( or Konqueror) navigate to: /boot/grub
open and edit ( fox ex. in kedit or in gedit) the file: menu.lst
(CAUTION MAKE A COPY OF THE FILI PRIOR TI EDIT)
editing, the file ADDING the foLLOWING commands, to the line of the boot kernel, viz, in the default boot line
of the menu lst:
opengl=nvidia ( or the name of your video board) res=1280x900 (or the resolution that you use) refresh=70 (or the refreshing rate that you use for your monitor) axgl sabayon
In the menu.lst,they are the lines for the default boot. These added commands will "forces" the kernel to use the specified resolution and open the video acceleration.
after editing, save the menu.lst file and reboot the machine, in orden to carry the new boot carachteristics.