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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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