I have a USB wireless adapter, the Rosewill RNX-EasyN1 (networkmanager lists it as a "Ralink 802.11 n WLAN") that worked fine in Jaunty but not Karmic. The driver (rt2870sta or rt3070sta or something like that) is still around, but plugging it in doesn't let me connect. It shows the device in networkmanager but I don't think it gets its own file in /dev. Running dmesg shows the following output after I plug it in:
[ 8565.704037] usb 1-6: new high speed USB device using ehci_hcd and address 5
[ 8566.032028] usb 4-2: new full speed USB device using uhci_hcd and address 2
[ 8566.177307] usb 4-2: not running at top speed; connect to a high speed hub
[ 8566.217421] usb 4-2: configuration #1 chosen from 1 choice
[ 8566.328849] phy1: Selected rate control algorithm 'minstrel'
[ 8566.330237] Registered led device: rt2800usb-phy1::radio
[ 8566.330277] Registered led device: rt2800usb-phy1::assoc
[ 8566.330317] Registered led device: rt2800usb-phy1::quality
[ 8566.332331] usbcore: registered new interface driver rt2800usb
[ 8566.362845] rt2870sta: module is from the staging directory, the quality is unknown, you have been warned.
[ 8566.368494] rtusb init --->
[ 8566.368544] usbcore: registered new interface driver rt2870
[ 8566.391625] rt3070sta: module is from the staging directory, the quality is unknown, you have been warned.
[ 8566.396539] rtusb init --->
[ 8566.396547] Error: Driver 'rt2870' is already registered, aborting...
[ 8566.396552] usbcore: error -17 registering interface driver rt2870
[ 8566.454449] rt2800usb 4-2:1.0: firmware: requesting rt2870.bin
[ 8567.687576] ADDRCONF(NETDEV_UP): wlan1: link is not ready
So, what is going wrong, or where should I file a bug on launchpad?