Comment 3 for bug 759997

I'm having the same problem however I'm using an Atheros ath9 wireless card. It works for a day and then next day I lose connectivity. The wifi card continues loaded with a static IP Address assigned to it but I cannot connect to anything.

I tried to whitelist ath_pci on /etc/modprobe.d/blacklist-ath_pci.conf but the problem still persists. Also yesterday I enabled the ubuntu backports on my software sources but so far no kernel updates.

I live in Australia and the domain is correct as far as the syslog messages are concerned:

tail /var/log/syslog
May 18 08:09:06 ed-linux kernel: [ 4029.970605] cfg80211: Regulatory domain changed to country: AU
May 18 08:09:06 ed-linux kernel: [ 4029.970607] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
May 18 08:09:06 ed-linux kernel: [ 4029.970611] cfg80211: (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm)
May 18 08:09:06 ed-linux kernel: [ 4029.970614] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2300 mBm)
May 18 08:09:06 ed-linux kernel: [ 4029.970618] cfg80211: (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2300 mBm)
May 18 08:09:06 ed-linux kernel: [ 4029.970622] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
May 18 08:09:06 ed-linux wpa_supplicant[1616]: WPA: Key negotiation completed with 00:24:36:ab:42:a9 [PTK=CCMP GTK=CCMP]
May 18 08:09:06 ed-linux wpa_supplicant[1616]: CTRL-EVENT-CONNECTED - Connection to 00:24:36:ab:42:a9 completed (reauth) [id=0 id_str=]
May 18 08:09:06 ed-linux NetworkManager[1464]: <info> (wlan0): supplicant connection state: 4-way handshake -> group handshake
May 18 08:09:06 ed-linux NetworkManager[1464]: <info> (wlan0): supplicant connection state: group handshake -> completed

lspci -k
05:01.0 Network controller: Atheros Communications Inc. AR5008 Wireless Network Adapter (rev 01)
        Subsystem: D-Link System Inc Device 3a6b
        Kernel driver in use: ath9k
        Kernel modules: ath9k

uname -a
Linux ed-linux 2.6.38-9-generic #43-Ubuntu SMP Thu Apr 28 15:25:15 UTC 2011 i686 i686 i386 GNU/Linux

cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.04
DISTRIB_CODENAME=natty
DISTRIB_DESCRIPTION="Ubuntu 11.04"