View Full Version : [ubuntu] Intel 4965AGN Unstable in Ubuntu 10.04 LTS 32Bit

December 8th, 2010, 04:17 AM
I'm using a notebook with Intel 4965AGN and connecting to a Linksys WRT320N router. I can connect most of the time but after a while (sometimes a few minutes, sometimes a few hours) I lose connection. The notification icon would not change. I would only find out when I browse or click on a link and it would just get stuck at "Looking for <url>..." My wife's notebook would still be connected to the router even after mine has mysteriously disconnected. But she uses another os.

details are as follows:

1. lspci -nn | grep '4965'

02:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection [8086:4229] (rev 61)

2. iwconfig wlan0

wlan0 IEEE 802.11abgn ESSID:"network"
Mode:Managed Frequency:2.412 GHz Access Point: 68:7F:74:18:8C:76
Bit Rate=36 Mb/s Tx-Power=14 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=44/70 Signal level=-66 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

3. lsmod | grep 'iwlagn'

iwlagn 106815 0
iwlcore 106050 1 iwlagn
mac80211 205402 2 iwlagn,iwlcore
cfg80211 126528 3 iwlagn,iwlcore,mac80211

4. sudo lshw -C network

description: Wireless interface
product: PRO/Wireless 4965 AG or AGN [Kedron] Network Connection
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlan0
version: 61
serial: 00:13:e8:95:48:cf
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlagn ip= latency=0 multicast=yes wireless=IEEE 802.11abgn
resources: irq:31 memory:96d00000-96d01fff

5. iwlist scan

wlan0 Scan completed :
Cell 01 - Address: 68:7F:74:18:8C:76
Frequency:2.412 GHz (Channel 1)
Quality=42/70 Signal level=-68 dBm
Encryption key:on
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
Extra: Last beacon: 26320ms ago
IE: Unknown: 00076E6574776F726B
IE: Unknown: 010882848B962430486C
IE: Unknown: 030101
IE: Unknown: 2A0104
IE: Unknown: 2F0104
IE: Unknown: 32040C121860
IE: Unknown: 2D1A7C181BFFFF000000000000000000000000000000000000 000000
IE: Unknown: 3D1601001300000000000000000000000000000000000000
IE: Unknown: DD750050F204104A00011010440001021041000100103B0001 03104700104244ABB52FB8BA544BD45F3C1C38A9C21021000C 4C696E6B73797320496E632E102300075752543332304E1024 000776312E302E30331042000234321054000800060050F204 0001101100075752543332304E100800020084
IE: Unknown: DD090010180202F0050000
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (1) : TKIP
Authentication Suites (1) : PSK
IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F 00
IE: Unknown: DD1E00904C337C181BFFFF0000000000000000000000000000 00000000000000
IE: Unknown: DD1A00904C3401001300000000000000000000000000000000 000000

6. lsb_release -d

Description: Ubuntu 10.04.1 LTS

7. uname -mr

2.6.32-26-generic i686

8. sudo /etc/init.d/networking restart

* Reconfiguring network interfaces... [ OK ]

December 14th, 2010, 05:49 PM
Found out something.

Whenever I get disconnected, the router would respond to my ping but outside addresses would not. I've already tried installing compat-wireless (linux-backport-module-wireless-generic) and wicd and they don't help.