Конфигурация X-сервера /etc/X11/xorg.conf

Section "Device"
	Identifier	"Configured Video Device"
	Driver	"openchrome"
	Option	"VBEModes" "Yes"
EndSection

Section "Monitor"
	Identifier	"Configured Monitor"
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Monitor		"Configured Monitor"
	Device		"Configured Video Device"
	SubSection "Display"
		Modes "1024x768"
	EndSubSection
EndSection

Section "ServerFlags"
        Option "blank time" "0"
        Option "standby time" "0"
        Option "suspend time" "0"
        Option "off time" "0"
        Option "dpms" "false"
EndSection 

Получить режим VBE

vbetool vbemode get

Прописать в конфигурацию grub режим vga = vbemode + 512

kernel		/boot/vmlinuz-2.6.28-11-generic root=UUID=lalala vga=792 ro quiet plash