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[darkvad0r <diaz.salvador+launchpad@xxxxxxxxx>]

*** This bug is a duplicate of bug 297965 ***
    https://bugs.launchpad.net/bugs/297965

I can confirm I'm having the same issues on a Macbook Pro 2,2 , which
has a wireless card with the exact same chipset (AR5008). I can confirm
also that I'm having the same problem described in this bug report:
https://bugs.edge.launchpad.net/ubuntu/+source/linux/+bug/278190

Relevant output from lspci:
03:00.0 Network controller: Atheros Communications Inc. AR5008 Wireless Network Adapter (rev 01)

Relevant output from modinfo ath9k:
filename:       /lib/modules/2.6.27-9-generic/kernel/drivers/net/wireless/ath9k/ath9k.ko
srcversion:     5307204F68EC6FC867B1E91
depends:        mac80211
vermagic:       2.6.27-9-generic SMP mod_unload modversions 586 

As the other bug report doesn't relate to this hardware, I'll just
report here my findings.

I was having intermittent disconnections so I thought I'd try the
workaround proposed for bug #278190: turning off encryption, but my ISP
(which controls the router) won't let me have an open access point, so I
just changed the encryption from WPA(TKIP+AES) to WPA(TKIP) and since
then I haven't had any disconnections.

Relevant output from dmesg with my router in WPA(TKIP+AES) mode:
[   59.852468] wlan0: authenticate with AP 62:7a:0d:84:8c:60
[   60.052093] wlan0: authenticate with AP 62:7a:0d:84:8c:60
[   60.252121] wlan0: authenticate with AP 62:7a:0d:84:8c:60
[   60.453073] wlan0: authentication with AP 62:7a:0d:84:8c:60 timed out
[   79.344353] wlan0: authenticate with AP 62:7a:0d:84:8c:60
[   79.344464] wlan0: authenticate with AP 62:7a:0d:84:8c:60
[   79.544073] wlan0: authenticate with AP 62:7a:0d:84:8c:60
[   79.744070] wlan0: authenticate with AP 62:7a:0d:84:8c:60
[   79.944074] wlan0: authentication with AP 62:7a:0d:84:8c:60 timed out

Relevant output from dmesg with my router in WPA(TKIP) mode:
[   98.988339] wlan0: authenticate with AP 62:7a:0d:84:8c:60
[   98.990516] wlan0: authenticated
[   98.990525] wlan0: associate with AP 62:7a:0d:84:8c:60
[   99.000239] wlan0: RX AssocResp from 62:7a:0d:84:8c:60 (capab=0x411 status=0 aid=2)
[   99.000251] wlan0: associated
[   99.000677] wlan0 (WE) : Wireless Event too big (338)
[   99.008113] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready


** This bug has been marked a duplicate of bug 297965
   ath9k performances are unacceptable

-- 
[ath9k] AR5008/AR5416 802.11n wireless card performs very slowly
https://bugs.launchpad.net/bugs/298192
You received this bug notification because you are a member of Mactel
Support, which is the registrant for Mactel Support (via bug 297965).

Status in “linux” source package in Ubuntu: New

Bug description:
Using Ubuntu 8.10.

I have a wireless card with the Atheros AR5008 chipset (802.11n), and it uses the ath9k driver.  The performance of this card in Ubuntu is terrible.

On an 802.11n network, where I often connect in Windows or OS X at a reported speed of 130 mbps (with none of these speed issues); iwconfig in Ubuntu reports that I am connected at 1 mbps.  I do not know if the information iwconfig is presenting is accurate, however, there is a noticeable drop in the speed of local transfers (i.e., transferring files over a LAN is very slow, controlling a machine via VNC crawls).  Switching to a 100 mbps resolves all speed issues, when the difference shouldn't be that noticeable.