OpenSUSE Wireless :: D-Link USB Wireless .11n Dongle Configured, But No Connection?

I recently bought a D-Link DIR-655 router capable of 802.11n operation, upgrading from a DIR-624 router only capable of 802.11g operation. While my overall setup uses wired connections, other people in the house prefer wireless, and the upgrade was undertaken more for a hoped for increase in wireless range, rather than the possibility of increased speed, since the router is located to accommodate the wired connections. However, to test the 802.11n operation I bought a D-Link DWA-130 USB dongle for my now 5-year old laptop, which comes with an otherwise satisfactory 100Mbs ethernet port(eth1) and an 802.11g wireless card(eth0). By checking the dmesg | grep firmware output after I plugged in the dongle I determined that the necessary firmware was rtl8192sfw.bin, which I found on the web, and downloaded into the directory /lib/RTL8192SU.

A subsequent reboot and then YaST > Network Devices > Network Settings showed the device as wlan0, but not configured. I changed the Network Setup Method to ifup (since I can see no way to do a device configuration in Network Manager), and configured the device, and at the same time deleted the configuration for the existing 802.11g wireless card(eth0). I then rebooted, went back into YaST to confirm the wlan0 device was configured and the 802.11g device (eth0) was not, changed the Network Setup Method back to Network Manager, rebooted again. Making sure that the router was set to only transmit/receive using 802.11n I then typed iwlist scan. To my surprise, the output showed first that the supposedly unconfigured eth0 device seemed to be still active, for it found my home network, and claimed that the protocol used was 802.11g. On the other hand, the newly configured wlan0 device produced the message: "Interface doesn't support scanning: Network is down".

First, should I expect iwlist scan to work for a device that shows as unconfigured? And even if it should work, shouldn't it show 802.11n as the protocol, assuming that the router is in fact telling the truth? Is there any independent means to determine if the router is only using 802.11n as it claims? Second, the overall goal is to make the wireless network in the house 802,11n only, and since the dongle is backward compatible with 802.11g, I would expect to permanently unconfigure the eth0 device and use the dongle, both here and on the road. I do not need two wireless connections on my laptopThe laptop is running SuSE 11.2 as of about a month ago. Some relevant(I hope) command line output:siracusa:~ # uname -aLinux siracusa 2.6.31.12-0.2-desktop #1 SMP PREEMPT 2010-03-16 21:25:39 +0100 i686 i686 i386 GNU/LinuxUSB Information

siracusa:~ # lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 2001:3301 D-Link Corp. [hex]

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