[Grml] Set resolution of grml-small in Virtualbox

Oh...

it doesnt depend on the kernel version. My second VM with grml 2009.10 kernel 2.6.31 only had the first time started a /dev/fb0 and a decent screenresolution. After grml2hd and reboot i put vga=792 by hand in the grub2 commandline - not in a grub configuaration file! - manually by hand! - there is no /dev/fb0, screen is small.

So please help me, how do i configure a working framebuffer?

Thanx ;-)