Ubuntu – Slow wifi download speed with a TP Link tl-wn722n

download-speedwireless

I have PC (with ubuntu 12.04) connected to LAN with 100 Mbps internet speed. I created wifi hotspot on my pc with wireless usb adapter TP Link tl-wn722n, which allows up to 150 Mbps speed. With my Asus Transformer pad (tablet) I manage to connect to this wifi hotspot and it says I have excellent, 54 Mbps speed. But when I test actual speed I get 0,8 Mbps download speed and 10 Mbps upload speed.

Why is my download speed so low?

Update: I tried internet connection in windows (I have dual boot) – I get download speed 30 Mbps and upload speed 18 Mbps…

So it's obviously ubuntu that's causing slower speeds (both)…

Best Answer

You have confused between local network speed and internet speed.

There are different specification for networking instrument.

I am assuming that you have some kind of modem / router in your home. The ISP connects to it.

The modem/router and your computer Ethernet port have capability of handling 100mbps. So when you connect to it. it shows as 100mbps connection. This is between your router and your computer ethernet port.
Similarly your router wireless transmitter (inside the roter) is capable of 150mbps. The asus tablet receiver has capability of 54mbps. So it connects at speed of 54mbps.

Why two wireless device has different speed?

Its depends on hardware. There are different standard for wireless. You can read in detail over here.
Why I am getting 8 MBps (there's a big difference between small b and big B) speed as download speed

This is the real speed your ISP provides. From your computer to router its 100mbps. But after router is controlled by ISP.

So its upto your plan. If download speed (as shown in download managers)is 8 MBps [means 8 mega bytes (not mega bits) per seconds] it can be said your internet plan's allotted network speed is 8*8 = 64 mbps. (this is mega bit, 8 bit = 1 byte)

If your network speed is 8 mbps, then in download managers it would show 8/8 = 1 MBPS

Related Solutions

Ubuntu – Slow Wifi on Atheros AR9271 aka TL-WN722N

All right, looks like I found a solution: I tried using laptop+TP-Link TL-WN722N with another router and suddenly the wifi stick was able to deliver the expected performance.

In the end I managed to narrow it down to a setting of my router called "WMM" (also called Wifi-Multi-Media or Wireless-Multimedia-Extensions or WME).

If I disable WMM in my router, the wifi stick delivers the expected 25 Mbits/sec that my internet connection is capable of.

However, please note that if you disable WMM/WME in your router settings your router will reduce its wifi speed to 54 Mbits/sec (IEEE 802.11g).

Summary:

On Windows the TP-Link TL-WN722N works as expected.

On Linux the TP-Link TL-WN722N only works correctly with IEEE 802.11g. If your TP-Link TL-WN722N is slow, you need to disable WMM or WME in your router settings.

Ubuntu – Slow WiFi since updating to 18.04

I just fixed this on ubuntu 18.04 - turns out there is some kind of issue with 802.11n and iwlwifi Intel chips. The solution is to turn it off.
Check if it works first with:

sudo modprobe -r iwlwifi

sudo modprobe iwlwifi 11n_disable=1

Make it permanent with this command:

echo "options iwlwifi 11n_disable=1" | sudo tee /etc/modprobe.d/iwlwifi.conf

I did this and my wifi speeds instantly went back to normal.

Best Answer

Related Solutions

Ubuntu – Slow Wifi on Atheros AR9271 aka TL-WN722N

Ubuntu – Slow WiFi since updating to 18.04

Related Question