We have faced internet connection issues with Toshiba laptops(Basically tried with the model C-850). This is due to the driver issue for both wired connection and wireless. The following article explains how to solve the wired connection driver issue with Toshiba satellite C-850 laptops.
You can download the driver from the below mentioned link
http://www.orbit-lab.org/kernel/compat-wireless-3-stable/v3.5/compat-wi…
Steps to do: