I gave up on centrino and bought an atheros PCI express module.
SparkLAN 11abgn Atheros AR9382 half size minicard (WPEA-121N)
$35 bucks or so. This module is 2x2MIMO dual band, equivalent to
centrino 6200 (methinks), not 3x3.
Worked out of the box in ubuntu 12.04.
2028 packets transmitted, 2023 received, 0% packet loss, time 2050218ms
rtt min/avg/max/mdev = 8.783/11.040/186.043/6.525 ms
xbmc@htpc:~$ iwconfig
wlan2 IEEE 802.11abgn ESSID:""
Mode:Managed Frequency:5.18 GHz Access Point:
Bit Rate=300 Mb/s Tx-Power=17 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=55/70 Signal level=-55 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:3 Invalid misc:8 Missed beacon:0
Better reception, better Tx power, higher speed (all under the exact same
conditions), zero packet loss after thousands of pings, negligible number of Tx
retries.
Now I am wondering why I bought (and paid more) for intel centrino 6300
in the first place. Atheros seems way better, costs less, and the open
source driver has a pretty good reputation (I remember using a very
solid madwifi driver a very very long time ago).
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https://bugs.launchpad.net/bugs/836250
Title:
[Oneiric] [Regression] Intel Corporation Centrino Ultimate-N 6300 poor
networking, packet loss and very slow Lenovo X201 and T500 laptops
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