Hello. I recently installed Ubuntu 12.10 64-bit. While I am just browsing the Internet, network connectivity is fine. However, when I watch a movie or download something the Internet connection fails. If I reboot the modem, everything works, but not for long. How do I correct this problem?
There are many bug reports describing such symptoms. Most likely a driver bug. Please search https://bugs.launchpad.net/ubuntu/+source/linux for the names of your network hardware drivers.