A few days ago I installed Kubuntu 15.04 on my laptop. in first day I had no problem using WiFi at home but in my office I have no WiFi and I have to use a wired Ethernet cable to connect to the Internet and Kubuntu couldn't connect to wired connection!
I searched and found this solution: adding two line of following commands to the
auto eth0 iface eth0 inet dhcp
and my problem with wired connection solved!
but a new problem was born! after this, my WiFi disconnects every time after a few minutes! and when I remove that code it will be OK!
can anyone tell me how I can have WiFi and wired Internet together?