1. Unable to reduce the brightness on my Toshiba laptop which is dual loaded with Windows 7 and Oracle Linux 6.
Edited the /sys/class/brightness/acpi_video0/brightness by sending echo n, but it did not work.
The Power Management preferences are not working although I am able to reduce the brightness meter, but not the actual brightness.
2. The Wi-Fi is not working, even after configuring the eth0 with wireless configuration. Any special driver needs to be installed?
Would you blame Microsoft if power management and Wifi did not work under Windows, or would you rather consider to contact the computer vendor?
I have not seen any information that mentions that Oracle Linux was focusing on support for desktop and mobile computer systems. Instead, Oracle Linux and the Oracle UEK kernel are optimized for enterprise server installations and supporting Oracle products.
Unless the vendor of your computer system provides RHEL or Oracle Linux support, your experience running Enterprise Linux will vary and depend on built-in hardware compatibility with the mainstream Linux kernel. You will certainly have more luck choosing a Linux distribution that is generally build to support desktop and mobile computing needs, such as Linux Ubuntu or Red Hat Fedora.
Alternatively, you can search the Web for open source support of your hardware components and build the drivers you need from source code. It might also be worth checking other communities, e.g. http://elrepo.org/tiki/tiki-index.php and http://fedoraproject.org/wiki/EPEL for support of your hardware. To run Oracle Linux on unsupported hardware I would generally recommend to look into VirtualBox at http://www.oracle.com/technetwork/community/developer-vm/index.html. The advantages of virtualization are too great to be ignored.
Of course, I am aware of the OEL's optimization and its real capabilities.
The Power Management, Wi-Fi are working fine on MS Windows 7, and I may be the drivers provided by my laptop vendor are not compatible for Oracle Linux 6.
I personally compared various versions of Linux and decided to have OEL after trying it out on VirtualBox (on which everything worked fine as the base is MS Windows). I will check the web for open source support for my hardware components.
However, I just wanted to know if any tweaks of file edits have to made in OEL in order to make those work (brightness, Wi-Fi) because I will be installing Oracle DB on it and that the concerns are important for me to rather ignore.
Yes, before finalizing dual boot configuration, I tried out OEL to the max on VirtualBox and it was totally fine. Hence, I wanted to have a dual boot and got stuck with some issues that can't be ignored.
Models in the Toshiba Satellite family vary greatly: http://en.wikipedia.org/wiki/Toshiba_Satellite. The model as such seems to be known for lack Linux support. I would not bet that anybody can provide a solution to fix your computer's hardware issues without knowing technical hardware details.
You may not really appreciate my answer(s), but anyway, I'm afraid your best option will be to post your question in a Toshiba related forum: http://forums.computers.toshiba-europe.com/forums/category.jspa?categoryID=62