Slow wireless with an Intel 4965
We run Ubuntu 12.04, 32bit, with the current kernel 3.2.27-generic on an MSI EX700.
I've already added the 11n_disable=1 tweek, without whcih, wireless has been unusable.
Now, it works OK, but speedtest shows:
Windows XP - down 11.68mbps, up 2.07mbps
Ubuntu 12.04 - down 2.06mbps up 2.0mbps
We've disabled ipv6, tried static and dinamic IPs, tried both
swcrypto=1 options, none of whcih made any difference.
The problem may be the symptom of high packet loss. For example, here's the output of iwconfig after booting and testing the speeds:
wlan0 IEEE 802.11abg ESSID:"amu"
Mode:Managed Frequency:2.462 GHz Access Point: 00:78:9E:FA:32:C8
Bit Rate=54 Mb/s Tx-Power=15 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Link Quality=58/70 Signal level=-52 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:11 Invalid misc:3627 Missed beacon:0
I've posted a help request before with lots of technical info and outputs.