Ubuntu – TP-Link TL-WN8200ND works very slowly

12.04adapterdriverswireless

I run Ubuntu 12.04 on a PC, recently I purchased a TP-Link USB adapter TL-WN8200HD

As it turned out it is not supported by the drivers that came with the Ubuntu 12.04.
From Web Search I understood that the core of this tp-link usb adapter is Realtek hardware and that suitable driver for Linux is 8192cu that can be found on the
Realtek web site. I downloaded it and followed the instructions on http://www.linux-hardware-guide.com/2013-04-21-tp-link-tl-wn823n-mini-wireless-n-usb-300mbps

Eventually my USB adapter works, it recognize my wireless network and even connects to internet. but the transition rates are very low.

when I connect by wire (Ethernet cable) i achieve around 10Mb download and 1Mb upload. while when I connecting wireless i get only 5Mb download and almost no upload (with 1m distance)

what can be the reason for that ?

If it can help, this is the result of iwconfig command :

wlan0   IEEE 802.11bg  ESSID:"naparniki10"  Nickname:"<WIFI@REALTEK>"
          Mode:Managed  Frequency:2.442 GHz  Access Point: 74:EA:3A:C3:A2:B8   
          Bit Rate:54 Mb/s   Sensitivity:0/0  
          Retry:off   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=100/100  Signal level=100/100  Noise level=0/100
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

p.s : I am relatively new to Ubuntu (and Linux). so please be detailed in your response

Best Answer

TL-WN8200ND has RTL8192CU (Realtek) chipset (see here: https://wikidevi.com/wiki/TP-LINK_TL-WN8200ND)

You can download the Linux driver here: http://www.realtek.com/downloads/downloadsView.aspx?Langid=1&PNid=21&PFid=48&Level=5&Conn=4&DownTypeID=3&GetDown=false&Downloads=true#2772

Just unzip and run sudo bash install.sh inside the uncompressed directory.

It works OK for me under Debian Wheezy, I think it should work on Ubuntu also.

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Ubuntu – Centrino Wireless-N 1000 poor performance on N Network

Well Yes I have another solution, perhaps it could fits to your problem or not. I tried the same solution disabling the N network mode, it works but it turns out not to work under N wireless network.

In my case, I was under a WEP encrypted wireless network, this was the reason why I was navigating to slow, with N mode enabled.

Just enable your N wireless mode and change your security wireless network to WPA2 , it will resolve your problem.

regards!

Ubuntu – Problem in Ubuntu 12.04 with TL-WN823N

sudo modprobe rtl8192cu

Also, you probably have to take your driver off of the blacklist in order for it to work. If you are trying to blacklist the kernel driver but have successfully installed the Realtek version it should not be an issue. I have installed Realtek drivers in the past and the Realtek driver will typically overide or install over the kernel version just as a newer version would during an update. I would try commenting out those three lines you added earlier before doing a reboot to see if that works. BTW, you need all three of those ones you blacklisted in order for rtl8192cu to work. (rtl8192cu rtlwifi and rtl8192c_common) They all depend on each other and need to be taken off of the blacklist. After you remove the blacklisted items and reboot.

Now you have to assign the driver to the usb device. So plug the device in.

First, find out the code you need for the following steps. I performed the following for the code '2001 330D'. All you need to do is replace your code for '2001 330D' if your output of lsusb is different.

lsusb

you should see something like this . . .

...
Bus 002 Device 020: ID 2001:330d D-Link Corp.

This would indicate your ID is 2001 330D. Again, if your's is different, substitute the correct value in the following commands.

sudo modprobe rtl8192cu
echo "2001 330D" | sudo tee /sys/bus/usb/drivers/rtl8192cu/new_id

To get the driver to load at boot . . .

sudo gedit /etc/modules

and add the line

rtl8192cu

Save and exit.

sudo gedit /etc/rc.local

and add the following

# Declare USB ID to rtl8192cu module
echo "2001 330D" | tee /sys/bus/usb/drivers/rtl8192cu/new_id

exit 0

Best Answer

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