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I am using Ubuntu 16.10. After installing the OS, my WiFi speed is so slow. Sometimes there is no internet but showing connected with my WiFi router. But when I use wired connection in the laptop port then it gets proper WiFi speed. When I connect physically to the router then it gets the proper speed, but in wireless connection there is a very slow speed in wifi connection. Sometime there is no speed at all.

How can I solve this problem?

marked as duplicate by Pilot6, David Foerster, Eric Carvalho, Zanna, karel Jul 10 '17 at 0:45

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    Please edit your question and add output of lspci -knn | grep Net -A2 terminal command. – Pilot6 Jan 11 '17 at 19:05
  • Welcome to Ask Ubuntu. Could you also clarify whether the WiFi connection speed improves when you are connected physically to the router (i.e., using cable connection) or is it the network connection that make communication faster. That is, the computer manages the wireless connection independently from the wired connection, I do not see how connecting physically would improve the wireless connection. – Juan Antonio Jan 11 '17 at 19:10
  • @Imran Hossain, please note that Wifi is half-duplex protocol, and many factors affects data transmission. Your wired connection if full-duplex. – fugitive Jan 11 '17 at 19:37
  • Could you please post text files, dialogue messages, and program output listings as text, not as images? To achieve the latter two you can either 1) select, copy & paste the dialogue text or terminal content or 2) save the program output to a file and use that. Longer listings (the editor will tell you what's too long) should be uploaded to a pastie service and linked to in the question. Thanks. – David Foerster Jul 9 '17 at 12:15

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