[Bug 540827] Re: ar9170usb wifi module crash + instabile connection

[prygme]

** Description changed:

  ar9170usb kernel module is crashing when used for TP-link TL-WN821N usb wifi card.
  If I remove it then it causes system crash, kernel panic.
- The bigger problem is: wifi net connection is very unstable. Losing connection in every few minutes. 
-   Connection speed is low, less than 100 kbps, many ip packages are lost. 
-   Sometimes strange ssid is shown for AP with strange characters. In this case it can't connect of course.
+ The bigger problem is: wifi net connection is very unstable. Losing connection in every few minutes.
+   Connection speed is low, less than 100 kbps, many ip packages are lost.
+   Sometimes strange ssid is shown for AP with strange characters. In this case it can't connect of course.
  
  This problems was detected, then TP-link  TL-WN821N was connected to a Belkin 54g access point. (WPA-PSK TKIP)
  However there is no problem when it connects to La Fonera fon2100a (WPA2-PSK AES).
  
  There is no any problem to connect to same Belkin 54g AP on Windows,
  from same computer and same TP-link TL-WN82N.
  
  The lshw output for this wifi device is:
  
-   *-network
-        description: Wireless interface
-        physical id: 1
-        logical name: wlan0
-        serial: 00:25:86:e5:52:c9
-        capabilities: ethernet physical wireless
-        configuration: broadcast=yes ip=192.168.2.4 multicast=yes wireless=IEEE 802.11bg
+   *-network
+        description: Wireless interface
+        physical id: 1
+        logical name: wlan0
+        serial: 00:25:86:e5:52:c9
+        capabilities: ethernet physical wireless
+        configuration: broadcast=yes ip=192.168.2.4 multicast=yes wireless=IEEE 802.11bg
  
  TP-Link  TL-WN821N is supported since kernel 2.6.31-19 (Karmic Koala), according to this wiki page:
  https://help.ubuntu.com/community/HardwareSupportComponentsWirelessNetworkCardsTP-Link#USB
  
  uname -a :
  Linux szaturnusz 2.6.32-16-generic-pae #25-Ubuntu SMP Tue Mar 9 18:03:39 UTC 2010 i686 GNU/Linux
  cat /proc/version_signature :
  Ubuntu 2.6.32-16.25-generic-pae

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ar9170usb wifi module crash + instabile connection
https://bugs.launchpad.net/bugs/540827
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