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I recently bought a tp-link Archer wn781nd for my desktop. The WiFi speed is very slow compared to my laptop.

My OS is Ubuntu 16.04 kernel 4.13.0 -41

I had a similar problem when using my laptop with rtl8723be which was solved by using the lwfinger drivers.

missionfission
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  • First, just from logic " I have tried every possible solution on the internet" is not correct. Seond, what's your MTU? ifconfig will show you. WiFi MTU should be 1492, not 1500 – waltinator May 14 '18 at 15:12
  • Ok edited MTU is 1500 – missionfission May 14 '18 at 18:28
  • @waltinator MTU is 1500 – missionfission May 15 '18 at 10:01
  • Because your MTU is 1500, data may buffered until 1500 bytes are accuimulated, then sent (at the network level). Once the 8 bytes of WiFi overhead are added, you have 1508 bytes of data. 1508 bytes of data must be sent in two packets, doubling the overhead. Replace wlan0 with your WiFi interface name and do sudo ifconfig wlan0 down;sudo ifconfig wlan0 mtu 1492;sudo ifconfig wlan0 up;ifconfig wlan0 and chech that your MTU is changed. It might be reset to 1500 by your DHCP, but that's a different problem. – waltinator May 16 '18 at 04:21
  • @waltinator changed the MTU but speed doesn't increase – missionfission May 16 '18 at 05:47

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