Wifi dongle help

[CurlyMo]

If you have questions about the download package, ask them in the specific dedicated thread.

[Beans.Jb]

Sorry.

My reply was a bit hasty. I tried to ping the IP address that the wlan0 interface received but it did not work. If I unplug the ethernet cable and ssh to the wlan0 ip address, I get "No route to host" but I can ping the router.

[CurlyMo]

Then what is the direct problem?

[Beans.Jb]

The pi has an IP address for the wlan0 interface but it isn't able to reach anything except the router.

[CurlyMo]

Not sure what can cause this... Awaiting input from others.

[Beans.Jb]

I suspect that this a DNS problem. What is the best way to add the router as a DNS server?

[belese]

Try to ping 8.8.8.8 (google dns), if you can ping it, surely a dns problem.
but if you can't ssh it, it's not a dns problem.

[Beans.Jb]

I resolved the DNS issue but I am having very strange results now. I have moved from my office to my home and I cannot connect to my home network.
My PC is connect to the network, but often when I run

Code:

root@xbian:/home/xbian# iwlist wlan0 scan
wlan0     No scan results

and then at other times

Code:

root@xbian:/home/xbian# iwlist wlan0 scan
wlan0     Scan completed :
          Cell 01 - Address: 20:4E:7F:F0:2B:26
                    ESSID:"NETGEAR41"
                    Protocol:IEEE 802.11bgn
                    Mode:Master
                    Frequency:2.437 GHz (Channel 6)
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 9 Mb/s
                              12 Mb/s; 48 Mb/s
                    Extra:rsn_ie=30140100000fac040100000fac040100000fac020c00
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD0E0050F204104A0001101044000102
                    Signal level=46/100

Any suggestions? This is the root of the problems. I have moved my pi from work to office thinking that there was a problem with Xbian.

[CurlyMo]

Can you tell us how you solved the DNS issue?

[Beans.Jb]

I added

Code:

dns-nameservers <dns server>

to the wlan0 interface in /etc/network/interfaces.

[Beans.Jb]

I think this is a driver issue. I used openELEC and the wifi has no problems. Is it possible to update the driver for this chipset?

[CurlyMo]

What driver do you need?

[Beans.Jb]

This dongle is using the RTL8191SU chipset. I ran

Code:

apt-get install firmware-realtek

but it says the drivers are up to date.
Still not sure why it works using openELEC but not Xbian...

[CurlyMo]

Any additional firmware or kernel modules?

[Beans.Jb]

How do I to add new kernel modules or firmware?