Hello , I am new to Linux... trying to understand how it works... After I install OpenSuse on the Laptop it recognize all what i needed to work on it. But the most important thing i needs arent working correctly, such as:

-Sound: It recognized my device but I cannot hear anything on OpenSuse.

-Wireless: It recognized the Device, but at KNetworkManager it stop
when I am connecting to my router, it stop when it says "Configuring
the Device" then pop up window... always like this.

-Ethernet: It reconized the device, and when I plugged the cable it connected to my network but when I openned Firefox i could not access any website, like i hadn't any internet.

LCD Bright: I wanted to reduce the Bright of my LCD on Opensuse, at this moment it is on the max bright that LCD can handle, and when i go to Battery settings and go to the Tab that says "Brightness" it says " Yout Hardware does not support" or something like this.

I would really apreciate if some1 could give me a light to follow. I really enjoy Linux.
Thanks for your attention