Wifi adapter issue

[garras]

Hello,
I have some troubles on make my wireless adapter working on RPi
the drivers seemes to be currently installed,
dmesg:

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6.593609] usb 1-1.3: Product: Wireless-G USB Network Adapter
[    6.607093] usb 1-1.3: Manufacturer: Cisco-Linksys

lsmod:

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Module                  Size  Used by
snd_bcm2835            21485  0 
snd_pcm                82208  1 snd_bcm2835
snd_seq                59808  0 
snd_timer              21905  2 snd_seq,snd_pcm
snd_seq_device          6920  1 snd_seq
snd                    57668  5 snd_seq_device,snd_timer,snd_seq,snd_pcm,snd_bcm2835
snd_page_alloc          5383  1 snd_pcm
arc4                    1319  2 
rt2500usb              18387  0 
rt2x00usb              12077  1 rt2500usb
rt2x00lib              43890  2 rt2x00usb,rt2500usb
mac80211              253889  2 rt2x00lib,rt2x00usb
cfg80211              180459  2 mac80211,rt2x00lib
evdev                   8922  0 

lsusb:

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Bus 001 Device 007: ID 13b1:000d Linksys WUSB54G v4 802.11g Adapter [Ralink RT2500USB]

and i've both firmware-ralink firmware-realtek installed
however when i try to run iwlist wlan0 scan
i get

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wlan0     No scan results

i've followed this guide http://elinux.org/RPi_Peripherals#Wirel ... ebian_6.29 but still not working

any ideas?

thanks in advance
G.

[garras]

i tried to change power supply and now

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sudo iwlist wlan0 scan 

seems to work,
but when i try to start the adapter with

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sudo ifup wlan0 

i get:

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No DHCPOFFERS received.
Unable to obtain a lease on first try.  Exiting.
Failed to bring up wlan0.

it still might be a problem caused by power supply?
any suggestion?
thanks
G.

[redhawk]

"it still might be a problem caused by power supply?" if you're using the PI's own USB port then that would be a very big possibility.
The PI can only knock out 100ma tops which isn't really suitable for most Wifi and some Wifi keyboard / mouse dongles.

Richard S.

[mikerr]

Also note if you forget the sudo in the scan command it will show "no scan results":

sudo iwlist scan

Wifi adaptors often need more power, they will show up as recognized in usb,
but can't scan or connect when connected directly.

Connecting via a powered hub will fix it, or (warranty busting) short the polyfuses on the pi
(see http://www.raspberrypi.org/phpBB3/viewt ... =63&t=8591)