The xmas grub theme is something like an eastern egg...
Want to enable it? follow this guide :
Code:
cd /boot
cp message message.old
mkdir messagetemp
cd messagetemp
cpio -iv < /boot/message
edit gfxboot.cfg with nano or other editor and change the value of penguin from -1 to 100
Code:
FROM:
#penguin theme likelihood in percent; -1 = auto
penguin=-1
TO:
#penguin theme likelihood in percent; -1 = auto
penguin=100
Save and replace the old message with new one
Code:
ls | cpio -ov > /boot/message
Reboot and enjoy