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Building and loading viafb device driver for Linux kernel 2.6
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Building fbcon console module.
    Step 1: Change to folder /usr/src/linux-2.6.
            # cd /usr/src/linux-2.6.
              The linux-2.6 directory depend on your kernel version, so if your kernel version is
              2.6.5-1.358, you should type "/usr/src/linux-2.6.5-1.358".
    Step 2: Configuring the kernel module
            # make menuconfig
    Step 3: Select fbcon item to module.
            -> Device Drivers->Graphics support->Console display driver support->
               <M> Framebuffer Console support
    Step 4: Save the current setting and quit.
    Step 5: Make fbcon module.
            # make modules
              Note that if no any error, this step will be produced "fbcon.ko" in 
              /usr/src/linux-2.6./drivers/video/console folder.
    Step 6: Copy fbcon.ko to lib folder.
            # cp /usr/src/linux-2.6./drivers/video/console/fbcon.ko  \
              /lib/modules/2.6./kernel/drivers/video

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Building viafb as a module. (for Linux kernel 2.6)
    Make sure you have the kernel sources in /usr/src/linux-2.6.
    Change to the viafb directory, and then following below steps:
    
    Step 1: change to folder /usr/src/linux-2.6.
            # cd /usr/src/linux-2.6.
              The linux-2.6 directory depend on your kernel version, so if your kernel version is
              2.6.5-1.358, you should type "/usr/src/linux-2.6.5-1.358".
    Step 2: copy viafb folder in current directory.
            # cp -rf .../viafb ./
    Step 3: change to viafb directory
            # cd /viafb
    Step 4: Clear all object file.
            # make clean
    Step 5: Make source code
            # make
              Note that if no any error, this step will be produced an object file "viafb.ko".
    Step 6: Install viafb.ko framebuffer driver
            # make install

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Using the viafb module. (for Linux kernel 2.6)
    If you want to modprobe viafb.ko into kernel and change the display mode in Linux kernel 2.6 and later versions,
    you need a framebuffer device driver(viafb.ko) and a framebuffer console module(fbcon.ko).
    Modprobing viafb will not change the display mode until you modprobe fbcon.
    You can see the related steps below.

    Step 1: Start viafb with default settings.
            # modprobe viafb
              Note that you can see the other options from "Using the viafb module. (for Linux kernel 2.4)" section.
    Step 2: Modprope fbcon.
            # modprobe fbcon