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Enabling Linux to boot with framebuffer enabled for various screen resolutions

Steps

for Grub

  • Change in the file /boot/grub/menu.lst or /boot/grub/grub.conf the line from
    kernel /vmlinuz-2.6.xx-x-xx root=/dev/hdaX ro
    to
    kernel /vmlinuz-2.6.xx-x-xx root=/dev/hdaX ro video=vesafb:ywrap,mtrr vga=0x318

Here is a chart of kernel mode numbers for the 'vga=' boot parameter.

Colours 640x400 640x480 800x600 1024x768 1152x864 1280x1024 1400x1050 1600x1200
4 bits ? ? 0x302 ? ? ? ? ?
8 bits 0x300 0x301 0x303 0x305 0x161 0x307 ? 0x31C
15 bits ? 0x310 0x313 0x316 0x162 0x319 0x340 0x31D
16 bits ? 0x311 0x314 0x317 0x163 0x31A 0x341 0x31E
24 bits ? 0x312 0x315 0x318 ? 0x31B 0x342 0x31F
32 bits ? ? ? ? 0x164 ? ? ?

External links

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