The most of the Realtek ethernet cards are working out of the box on a Linux machine. But some of them, for e. g. the RTL8111/RTL8168, making some troubles.
In the last three Ubuntu Versions (11.10, 11.04 and 10.10) and the latest Debian testing, you will have the problem, that the noticed ethernet card above will only work with round about 200kb/s and after a while the whole network connection will break down for more than a minute and than you will be back with your 200kb/s again.
So, this is really annoying and it’s nearly impossible to work with your machine. To solve this problem you have to use the official Realtek (r8168) driver instead of the r8169 driver, which is included in the Linux Kernel.
This tutorial will show you in a few steps, how you can build the official Realtek driver for the RTL8111/RTL8168 ethernet card for Ubuntu or Debian:
bird2010 wrote:@brute: My network connection is built into my motherboard as well. If you have a Realtek network connection, please follow my steps listed above. I do not know how to check the hardward in Linux Mint. In Windows 7, you open the Control Panel, click on Hardware and Sound, and then click on to Device Manager under Devices and Printers. Open the Network Adapters branch and check for the model of the controller.
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