How to set different VGA resolutions in Linux (M. Bongi)
*********************************************
(superuser privileges required)

Choose the resolution and colour depth that you want to use out of the
table below: 

   Resolution in Pixel

   colour depth     | 640x480  800x600  1024x768 1280x1024
   256        (8bit)|  769      771       773      775
   32000     (15bit)|  784      787       790      793
   65000     (16bit)|  785      788       791      794
   16.7 Mill.(24bit)|  786      789       792      795

** Boot loader LILO:

Edit your /etc/lilo.conf file and change the entry vga=normal into the 
desired mode e.g. vga=791. After saving the file execute the command:

   /sbin/lilo ,

then reboot the system.

** Boot loader GRUB:

Edit your /etc/grub.conf file and add the entry vga=xxx in the "kernel" line. 
For instance I have this line in grub.conf:

   kernel /boot/vmlinuz-2.4.7-10 ro root=/dev/hdb6 vga=791

Reboot the system.

---------------------------
You can see in the top left corner a little penguin logo. 
Please consider that your graphic card may not support all resolutions.