Comment 3 for bug 298192

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