Son of Mars

Oh, it's so terrible, a RJ45 port of my ADSL router 's fail. When I plug LAN wire, ADSL line can't synchronize, so I must use USB port to connect Internet. I don't understand what happen here??. When i ask my friend, he said that he had the same problem, but his router is CNet or something like that and mine is GVC. What the reason is, but in few day next, I can't online when using Linux OS. Oh no!!!!!!!!!!!!!!