I tried looking for another post about this, but they were all using wifi connection, while my problem is a little different.
A few days ago I formatted an old computer and installed Ubuntu server 12.10 on that, to use it as a home fileserver (so I also installed samba and openSSH, as an online guide suggested).
I plugged in the Ethernet cable and straight since starting the installation, my WiFi network crashed. From since it crashes every now and then, without forewarn or malfunctions, it simply stops working.
My WiFi repeater is also an Ethernet switch, so both the server and WiFi are plugged in there, one physically through Ethernet, the other being integrated in the switch. Luckily I can reboot just the WiFi by pressing a button on the repeater, but since I started the server project to have all files available on any device on the network.
When someone is looking at a video through a WDTV device the crash means he has to reconnect and start over, so rebooting it is not an option for me ..
I must admit I'm more than just inexperienced with Ubuntu, so I would happily accept any suggestion.