Console Framebuffer in Ubuntu[Edited]

The Linux console framebuffer allows you to achieve higher screen resolutions within your Linux console. However, as of this writing, Ubuntu 7.10 Gutsy by default does not load the required kernel modules. By passing the “vga=XXX” kernel option without these modules loaded, you are left with a blinking cursor in the upper-left hand corner of your screen. Here’s how to get the console framebuffer in working order.

1. Ensure the initrd image includes framebuffer support by adding “fbcon” , “vesafb” and “vga16b” to /etc/initramfs-tools/modules.

$ echo "vesafb" | sudo tee -a /etc/initramfs-tools/modules
$ echo "fbcon" | sudo tee -a /etc/initramfs-tools/modules
$ echo "vga16fb
"| sudo tee -a /etc/initramfs-tools/modules

2. Remove (or comment out) “vesafb” and "vga16fb "from blacklisted modules in /etc/modprobe.d/blacklist-framebuffer.

#blacklist vesafb
#blacklist vga16fb

3. Add the desired framebuffer variable to the default kernel options section in /boot/grub/menu.lst. For 1024×768, the string should look like the following.

#defoptions=quiet splash vga=791
#comment：vga=0×314 as 800＊600 16it

#        |640x480 800x600 1024x768 1280x1024

#256 | 0x301        0x303      0x305          0x307

#32k | 0x310        0x313       0x316          0x319

#64k | 0x311        0x314       0x317          0x31A

#16M | 0x312       0x315       0x318          0x31B

4. Update GRUB.

$ sudo update-grub

5. If Usplash is configured for a higher resolution than your framebuffer, it will appear off-centered. So adjust /etc/usplash.conf to use the same resolution.

xres=1024
yres=768

6. Update initramfs to rebuild the initrd image.

$ sudo update-initramfs -u

After rebooting, your usplash will appear as normal and you can Ctrl+Alt+F1 to a console after your X environment has finished loading. The text in your console should now appear much smaller and will be much easier to use for large amounts of console work.