it's the video mode. to frame buffer or not to frame buffer. personally i use 788 (decimal. table below is hex), 800x600 framebuffer. lovely. you should set it in your /etc/lilo.conf at the vga=option
Code:
| 640x480 800x600 1024x768 1280x1024
----+-------------------------------------
256 | 0x301 0x303 0x305 0x307 =20
32k | 0x310 0x313 0x316 0x319 =20
64k | 0x311 0x314 0x317 0x31A =20
16M | 0x312 0x315 0x318 0x31B
i don't know why you're getting this, maybe your graphics card is not even vesa2.0 complint but that's pretty unlikely unless you're using a gameboy.