Unable to use wifi

[Nishita Desai <nish.des@gmail.com>]

Dear All,

I am using Debian 5.0 amd64 version (2.6.26-1-amd64).

I would appreciate any help on the following problem:
The wifi starts up fine but after a few minutes, the computer simply
hangs and all LED indicators are on.
Package versions: iwlwifi (0.14+lenny), wpasupplicant (0.6.4-3)

I did find an old bug
(http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=488723) but nothing
else.  Has anyone else had this problem?  The strange thing is I was
using wireless for almost a year on the same system without any
trouble.

I am attaching parts of dmesg output which I think might be relevant:

[    9.332536] iwl4965: Intel(R) Wireless WiFi Link 4965AGN driver for
Linux, 1.2.26ks
[    9.332536] iwl4965: Copyright(c) 2003-2008 Intel Corporation
[    9.336725] ACPI: PCI Interrupt 0000:01:00.0[A] -> GSI 16 (level,
low) -> IRQ  16
[    9.336737] PCI: Setting latency timer of device 0000:01:00.0 to 64
[    9.336766] iwl4965: Detected Intel Wireless WiFi Link 4965AGN
[    9.383441] iwl4965: Tunable channels: 11 802.11bg, 13 802.11a channels
[    9.392899] phy0: Selected rate control algorithm 'iwl-4965-rs'
[    9.497639] ACPI: PCI interrupt for device 0000:01:00.0 disabled
[    9.497719] input: 4965AGN as /class/input/input8
--
[   72.213363] wlan0: Initial auth_alg=0
[   72.213374] wlan0: authenticate with AP 00:1f:f3:bf:a6:66
[   72.219952] wlan0: RX authentication from 00:1f:f3:bf:a6:66 (alg=0
transaction=2 status=0)
[   72.219952] wlan0: authenticated
[   72.219952] wlan0: associate with AP 00:1f:f3:bf:a6:66
[   72.223412] wlan0: RX AssocResp from 00:1f:f3:bf:a6:66 (capab=0x421
status=0 aid=1)
[   72.223412] wlan0: associated
[   72.223412] wlan0: switched to short barker preamble
(BSSID=00:1f:f3:bf:a6:66)
[   72.223412] wlan0 (WE) : Wireless Event too big (320)
[   72.233800] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   82.293750] wlan0: no IPv6 routers present


Thanks,
Nishita