TL-WN822N v3.0 not working on Ubuntu 12.04

[londontechie]

Hi All,
I'm facing a strange problem.
I just bought TP-Link TL-WN822N v3.0 USB adapter and have been trying to make it work with Ubuntu 12.04.

I can see loads of wirless networks except my own wireless sky router. This is really weird. How come it doesn't show up my own wireless network but shows others?

This works perfectly fine on Windows 7.

I've Windows 7 and Ubuntu on HP Compaw dc7900.

I tried to manually add wireless network by entering SSID, MAC etc but it still doesn't work.

Am I missing something?

Following are some useful command outputs:

root@HP-Compaq-dc7900:~# lsusb
Bus 002 Device 003: ID 0bda:8178 Realtek Semiconductor Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

root@HP-Compaq-dc7900:~# rfkill list
1: phy1: Wireless LAN
Soft blocked: no
Hard blocked: no

root@HP-Compaq-dc7900:~# lsmod
Module Size Used by
ath9k_htc 90845 0
ath9k_common 13782 1 ath9k_htc
ath9k_hw 384090 2 ath9k_htc,ath9k_common
ath 19436 3 ath9k_htc,ath9k_common,ath9k_hw
joydev 17394 0
dm_crypt 22572 1
rfcomm 38104 0
parport_pc 32115 0
bnep 17791 2
ppdev 12850 0
bluetooth 189585 10 rfcomm,bnep
arc4 12474 2
rtl8192cu 67480 0
rtl8192c_common 47696 1 rtl8192cu
rtlwifi 65304 1 rtl8192cu
mac80211 475546 4 ath9k_htc,rtl8192cu,rtl8192c_common,rtlwifi
snd_hda_codec_analog 75324 1
cfg80211 181041 4 ath9k_htc,ath,rtlwifi,mac80211
coretemp 13362 0
kvm 365588 0
tpm_infineon 17297 0
hp_wmi 13653 0
gpio_ich 13160 0
sparse_keymap 13659 1 hp_wmi
snd_hda_intel 32983 0
snd_hda_codec 116477 2 snd_hda_codec_analog,snd_hda_intel
snd_hwdep 13277 1 snd_hda_codec
snd_pcm 81124 2 snd_hda_intel,snd_hda_codec
snd_seq_midi 13133 0
snd_rawmidi 25426 1 snd_seq_midi
snd_seq_midi_event 14476 1 snd_seq_midi
microcode 18396 0
snd_seq 51594 2 snd_seq_midi,snd_seq_midi_event
snd_timer 28932 2 snd_pcm,snd_seq
snd_seq_device 14138 3 snd_seq_midi,snd_rawmidi,snd_seq
tpm_tis 18279 0
snd 62675 9 snd_hda_codec_analog,snd_hda_intel,snd_hda_codec,s nd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd _seq_device
psmouse 91381 0
serio_raw 13032 0
soundcore 14636 1 snd
lpc_ich 16993 0
snd_page_alloc 14109 2 snd_hda_intel,snd_pcm
mei 36404 0
mac_hid 13078 0
lp 17456 0
parport 40931 3 parport_pc,ppdev,lp
floppy 60214 0
wmi 18745 1 hp_wmi
i915 479235 3
drm_kms_helper 47459 1 i915
drm 239971 4 i915,drm_kms_helper
ahci 25621 4
libahci 26166 1 ahci
i2c_algo_bit 13317 1 i915
video 19117 1 i915
e1000e 177679 0

root@HP-Compaq-dc7900:~# iwconfig
wlan0 IEEE 802.11bgn ESSIDff/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry long limit:7 RTS thr=2347 B Fragment thrff
Encryption keyff
Power Managementff

lo no wireless extensions.

eth0 no wireless extensions.

[londontechie]

I followed instructions on this post http://ubuntuforums.org/showthread.php?t=1905813 and various other forum posts but none seem to work.

modprobe ath9k_htc -> rebooting doesn't help.

[londontechie]

Some more useful details. Just checked dmesg output and it does recognizes the usb wifi adapter? But it doesn't show up in lsusb?

[ 729.020031] usb 2-5: new high-speed USB device number 3 using ehci_hcd
[ 729.153475] usb 2-5: New USB device found, idVendor=0bda, idProduct=8178
[ 729.153479] usb 2-5: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 729.153482] usb 2-5: Product: USB WLAN
[ 729.153485] usb 2-5: Manufacturer: 802.11n
[ 729.153488] usb 2-5: SerialNumber: 00e04c000001
[ 729.153972] rtl8192cu: Chip version 0x11
[ 729.230473] rtl8192cu: MAC address: f8:1a:67:08:c1:94
[ 729.230477] rtl8192cu: Board Type 0
[ 729.230720] rtlwifi: rx_max_size 15360, rx_urb_num 8, in_ep 1
[ 729.230724] cfg80211: Updating information on frequency 2412 MHz for a 20 MHz width channel with regulatory rule:
[ 729.230727] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
[ 729.230729] cfg80211: Updating information on frequency 2417 MHz for a 20 MHz width channel with regulatory rule:
[ 729.230731] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
[ 729.230734] cfg80211: Updating information on frequency 2422 MHz for a 20 MHz width channel with regulatory rule:
[ 729.230736] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
[ 729.230738] cfg80211: Updating information on frequency 2427 MHz for a 20 MHz width channel with regulatory rule:
[ 729.230740] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
[ 729.230742] cfg80211: Updating information on frequency 2432 MHz for a 20 MHz width channel with regulatory rule:
[ 729.230745] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
[ 729.230747] cfg80211: Updating information on frequency 2437 MHz for a 20 MHz width channel with regulatory rule:
[ 729.230749] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
[ 729.230751] cfg80211: Updating information on frequency 2442 MHz for a 20 MHz width channel with regulatory rule:
[ 729.230753] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
[ 729.230756] cfg80211: Updating information on frequency 2447 MHz for a 20 MHz width channel with regulatory rule:
[ 729.230758] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
[ 729.230760] cfg80211: Updating information on frequency 2452 MHz for a 20 MHz width channel with regulatory rule:
[ 729.230762] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
[ 729.230764] cfg80211: Updating information on frequency 2457 MHz for a 20 MHz width channel with regulatory rule:
[ 729.230767] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
[ 729.230769] cfg80211: Updating information on frequency 2462 MHz for a 20 MHz width channel with regulatory rule:
[ 729.230771] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
[ 729.230773] cfg80211: Disabling freq 2467 MHz as custom regd has no rule that fits a 20 MHz wide channel
[ 729.230775] cfg80211: Disabling freq 2472 MHz as custom regd has no rule that fits a 20 MHz wide channel
[ 729.230777] cfg80211: Disabling freq 2484 MHz as custom regd has no rule that fits a 20 MHz wide channel
[ 729.230813] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw.bin
[ 729.233357] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[ 729.233469] ieee80211 phy1: Selected rate control algorithm 'rtl_rc'
[ 729.234353] rtlwifi: wireless switch is on
[ 729.247716] rtl8192cu: MAC auto ON okay!
[ 729.280359] rtl8192cu: Tx queue select: 0x05
[ 729.649911] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 729.650135] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready

[londontechie]

# ifconfig
eth0 Link encap:Ethernet HWaddr 00:24:81:1b:f8:62
inet addr:192.168.0.6 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::224:81ff:fe1b:f862/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:19158 errors:0 dropped:0 overruns:0 frame:0
TX packets:13908 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:21774967 (21.7 MB) TX bytes:2455375 (2.4 MB)
Interrupt:19 Memory:f0500000-f0520000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:1098 errors:0 dropped:0 overruns:0 frame:0
TX packets:1098 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:123778 (123.7 KB) TX bytes:123778 (123.7 KB)

wlan0 Link encap:Ethernet HWaddr f8:1a:67:08:c1:94
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

[londontechie]

finally figured it out.

[wildmanne39]

That's great! Please post the solution so everyone can benefit from your experience.
Thanks

[londontechie]

Ended up writing a blog post while I was resolving this issue, it might help if someone is having similar problem as I had.
http://www.ajaykumarsingh.com/linux/...ntu-12-04.html

Here is the solution
1) Download Realtek driver for Linux from Realtek website
http://www.realtek.com.tw/downloads/...true#RTL8192CU
If above link doesn’t work then search for RTL8192CU driver on Realtek website.
2) Download and install the driver
After downloading above driver, unzip it.
cd to the folder where you unzipped the driver and run following commands. If you are not root then use sudo before these commands where required.
chmod 755 ./install.sh
./install.sh
3) Blacklist existing drivers
vi /etc/modprobe.d/blacklist.conf
At the end add followings
blacklist rtl8192cu
blacklist rtl8192c_common
blacklist rtlwifi
4) Auto load module
vi /etc/modules
Add 8192cu at the end of this file.
5) Reboot
reboot

[adambh]

This didn't work for me using 13.10. Initially I had intermittent connection (i.e. would connect and then drop out); interesting, I could see all of my neighbour's wifi networks but not mine. After blacklisting the drivers I had no wifi at all. Signal strength is not a problem as the wifi works fine under Windows 8. Found gedit much easier to use than vi editor. Still stuck.

[praseodym]

For 13.10 you need a patched driver:

sudo apt-get install --reinstall linux-headers-$(uname -r) linux-headers-generic build-essential dkms git 
git clone https://github.com/pvaret/rtl8192cu-fixes.git
sudo dkms add ./rtl8192cu-fixes
sudo dkms install 8192cu/1.7
echo "blacklist rtl8192cu" | sudo tee -a /etc/modprobe.d/blacklist.conf

Reboot.

[Rbazley]

Just wanted to thank you for this, fixed my problem perfectly.