Disable Frame Buffer in Ubuntu 10.04 Server (VirtualBox)

In Ubuntu 10.04 Server with the frame buffer enabled, seems that cause lag in the screen when is used as a guest in VirtualBox. Here is how to disable the frame buffer:

Edit the file "/etc/modprobe.d/blacklist-framebuffer.conf" and add "blacklist vga16fb" (without the quotes). Un-comment "GRUB_TERMINAL=console" in "/etc/default/grub" to prevent GRUB from starting a frame buffer.

source: http://ubuntu-virginia.ubuntuforums.org/showpost.php?p=9343024&postcount=2
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