Operating System Installation Vs Driver Installation.

While installation Operating system, Os itself install provisional driver for the specific hardware.Yet in some case advanced hardware setup like quadro 6000 DVI card rather than ordinary VGA Card ,in-build RAID storage controller.In that type of scenario we need to install driver manually after OS installation.

Example 1)Graphics Card Quadro 6000 DVI Card rather than the VGI Card.
First - Remove the Graphics card then install the operating system
Second - After OS installation, install Driver for Graphics Card and insert Physical Graphics Card into PCI slot.
Example 2)RHEL6 Installation Option - RHEL6-Install System with BASIC VIDEO DRIVER
if we install without this option, while GUI Mode is staring we will not get proper display.
In that case we need to choose RHEL6-Install System with BASIC VIDEO DRIVER option.

NVIDIA Graphics card driver Installation Error Message.

 ERROR: Unable to find the kernel source tree for the currently running kernel.  Please make sure you have installed the kernel source files for your kernel and that they are properly configured; on Red Hat Linux systems, for example, be sure you have the 'kernel-source' or 'kernel-devel' RPM installed.  If you know the correct kernel source files are installed, you may specify the kernel source path with the '--kernel-source-path' command line option.
ERROR: Installation has failed.  Please see the file '/var/log/nvidia-installer.log' for details.  You may find suggestions on fixing installation problems in the README available on the Linux driver download page at www.nvidia.com.

Step 1: Install yum instal kernel*
Step 2: restart the machine.(without restart it won't work, Because we need to load with new kernel)

Disable nouveau
open “/etc/modprobe.d/blacklist.conf” in your favourite editor and add “blacklist nouveau”, ofcourse without double-quotes.
blacklist nouveau
# mv /boot/initramfs-$(uname -r).img /boot/initramfs-$(uname -r).img.bak
# dracut -v /boot/initramfs-$(uname -r).img $(uname -r)

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Install AMD Graphics Card Driver.
While I try to Install AMD Graphics card driver I tried first 4 things which is come with .tar.xz format.it is like configure repo and install the package but it won't fruitful. so that I have tried last one which is marked it is .zip file format it contains file amd-driver-installer-15.302.2301-x86.x86_64.run.just run it will automatically install and I got the display.