add 'vga=796' at the end of kenel line
for instance:
kernel /boot/vmlinuz-2.6.22.5-76.fc7 ro root=LABEL=/1 rhgb quiet vga=796
what number should you use instead of 796? Check this page out:
http://en.wikipedia.org/wiki/VESA_BIOS_Extensions
or google VESA BIOS :-)
OK, some people, like me, don't use vesa driver. So what number should we use? check the following link out:
http://www.linuxquestions.org/questions/linux-hardware-18/terminal-window-resolution-better-than-80x24-63927/
Linux video mode numbers
The Linux kernel allows user configuration of VESA modes at boot time using the 'vga' kernel parameter. This parameter does not directly accept VESA video mode numbers; instead, a Linux video mode number must be calculated using the VESA number.
| 1024×640 | 1024×768 | 1152×720 | 1280×1024 | 1440×900 | 1600×1200 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 16 color palette | 772 | 774 | ||||||||||
| 256 color palette | 874 | 773 | 869 | 775 | 864 | 796 | ||||||
| 15-bit (5:5:5) | 875 | 790 | 870 | 793 | 865 | 797 | ||||||
| 16-bit (5:6:5) | 876 | 791 | 871 | 794 | 866 | 798 | ||||||
| 24-bit (8:8:8) | 877 | 792 | 872 | 795 | 867 | 799 | ||||||
| 32-bit (8:8:8)1 | 878 | 824 | 873 | 829 | 868 | 834 |
1: 32-bit is really (8:8:8:8), but the final 8-bit number is an "empty" alpha channel. It is otherwise equal to 24-bit color.
