Comment 6 for bug 147811

Vittorio, I get this very same problem with/without wep, could You please post
the outputs of the following commands:
lsusb
dmesg
ifconfig
iwconfig

Daniel, forgive me for double posting here and on https://bugs.launchpad.net/bugs/144448

>This looks similar with bug #147811. I have the same problem.

I do agree with ^that^, this is the same that's happening to me

>I have posted my log files on the other bug report.

regarding Your dmesg:

[ 218.108000] ieee80211_init: failed to initialize WME (err=-17)
[ 218.120000] iwlwifi_rc80211_simple: Unknown symbol iwlwifi_ieee80211_rate_control_unregister
[ 218.120000] iwlwifi_rc80211_simple: Unknown symbol iwlwifi_sta_info_put
[ 218.120000] iwlwifi_rc80211_simple: Unknown symbol iwlwifi_sta_info_get
[ 218.120000] iwlwifi_rc80211_simple: Unknown symbol iwlwifi_ieee80211_rate_control_register

You get the error 17 too

>Also, here is lsusb and lspci. The Asus adapter si the one on usb (Bus 004 Device 002: ID 174f:a311)

this is a device id that I do not know of, perhaps a very recent stick? Anyhow all those different
flavours of Asus sticks seem to share the same code, and hidden somewhere there must a typo!