Public bug reported:
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.
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
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
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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ar9170usb wifi module crash + instabile connection
https://bugs.launchpad.net/bugs/540827
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