I think the WLAN performance of the ipw2200 kernel module isn't as good as is should be. I'm running a FSC Lifebook S-6120D here with Intel PRO/Wireless 2200BG chipset. Right now i'm using the latest hardy kernel within Ubuntu Gutsy Gibbon.
<snip>
$ uname -r
2.6.24-5-generic
$ lspci | grep Net
01:0d.0 Network controller: Intel Corporation PRO/Wireless 2200BG Network Connection (rev 05)
$ lsmod | grep ipw
ipw2200 146120 0
ieee80211 35528 1 ipw2200
</snip>
I'm using WLAN at two different locations. At home within ~5m distance from the AP and at my university. At home WLAN works good. But at the university it's troublesome. I'm sitting here in between a number of people with laptops inside our shiny new 24/7 library. I'm sure there are some people with similar notebooks like the one i've got, most of them use Windows, some MacOS X. I'm one of the few Linux users. All these guys have decent WLAN reception, except me. I can see our WLAN, and the reception is not bad. But i can't transmit data without a lot of packet losses.
<snip>
iwlist scan
...
eth1 Scan completed :
Cell 01 - Address: 0A:0F:A3:A9:18:B4
ESSID:"VPN/WEB"
Protocol:IEEE 802.11bg
Mode:Master
Frequency:2.462 GHz (Channel 11)
Encryption key:off
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
48 Mb/s; 54 Mb/s
Quality=39/100 Signal level=-77 dBm
Extra: Last beacon: 1560ms ago
</snip>
But when i try to start vpnc it usually fails. The reason: paket loss. When i ping my DNS server, i get over 50% packet loss.
<snip>
$ ping -c 100 129.13.64.5
PING 129.13.64.5 (129.13.64.5) 56(84) bytes of data.
--- 129.13.64.5 ping statistics ---
100 packets transmitted, 45 received, 55% packet loss, time 99043ms
rtt min/avg/max/mdev = 1.327/3.949/21.601/4.593 ms
</snip>
When i watch /var/log/messages while connecting to our network i see messages like this
<snip>
$ tail -f -n 0 /var/log/messages
Jan 30 14:20:25 stein kernel: [ 2479.061629] ADDRCONF(NETDEV_UP): eth1: link is not ready
Jan 30 14:20:26 stein kernel: [ 2479.538324] ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
Jan 30 14:20:49 stein dhcdbd: message_handler: message handler not found under /com/redhat/dhcp/eth1 for sub-path eth1.dbus.get.host_name
Jan 30 14:20:50 stein dhcdbd: message_handler: message handler not found under /com/redhat/dhcp/eth1 for sub-path eth1.dbus.get.nis_domain
Jan 30 14:20:50 stein dhcdbd: message_handler: message handler not found under /com/redhat/dhcp/eth1 for sub-path eth1.dbus.get.nis_servers
Jan 30 14:20:58 stein kernel: [ 2511.367516] tun0: Disabled Privacy Extensions
</snip>
I even noticed
<snip>
Jan 30 13:51:19 stein kernel: [ 732.956386] ipw2200: Firmware error detected. Restarting.
</snip>
When I boot into WinXP WLAN works much better. In other words: Same place, same WLAN, same computer, same time: WLAN under Windows works, WLAN under Linux doesn't work as it should.
Hi Christoph,
Per the kernel team's bug policy, can you please attach the following information. Please be sure to attach each file as a separate attachment.
* cat /proc/version_
* dmesg > dmesg.log
* sudo lspci -vvnn > lspci-vvnn.log
For more information regarding the kernel team bug policy, please refer to https:/