Comment 10 for bug 152456

I have reproduced this again. This time uptime was 1hr 52min so that is unrelated. I confirmed that usb devices continued working after this occurs. wlan0 is not listed when doing an ifconfig. wlan0 is listed when doing an iwconfig but didn't show an essid, ip, etc. I also found a thread in the ubuntu forums reporting the same problem with an external usb wireless adapter using the same chipset.

Hope this helps