User Feedback :: anyone knows how to scan wireless signal?



the USB adapter works fine at windows 2000. It can scan nearby wireless access points. But scanning dones't work in DSL.
Quote
Function not implemented
would probably imply the driver doesn't support it.  You could try seeing if there's updated drivers, (or even use ndiswrapper - if this is absolutely required)?
Quote
You could try seeing if there's updated drivers, (or even use ndiswrapper - if this is absolutely required)?

- I'm not so sure you can do this with ndiswrapper. I've always had the problem that I need to know the ssid or ssid and wep code before I load ndiswrapper or otherwise it will not load.

If ndiswrapper has not loaded/connected then things will not work:
Code Sample
$ sudo /usr/local/bin/ndiswrapper.sh /mnt/sda1/ndiswrapper/bcmwl5a.inf wlan0 ssid 2>&1 >/dev/null
Operation failed
$ iwlist wlan0 scanning
wlan0     No scan results [even though a network is present]
...but if ndiswrapper does connect then everything seems to work fine:
Code Sample
$ sudo /opt/myndis.sh
$ iwlist wlan0 scanning
Warning: Driver for device wlan0 recommend version 18 of Wireless Extension,
but has been compiled with version 16, therefore some driver features
may not be available...
wlan0     Scan completed :
         Cell 01 - Address: 00:12:17:71:0F:5C
                   ESSID:"juanito"
                   Protocol:IEEE 802.11b
                   Mode:Managed
                   Frequency:2.437GHz
                   Quality:0/100  Signal level:-56 dBm  Noise level:-256 dBm
                   Encryption key:on
                   Bit Rate:1Mb/s
                   Bit Rate:2Mb/s
                   Bit Rate:5.5Mb/s
                   Bit Rate:6Mb/s
                   Bit Rate:9Mb/s
                   Bit Rate:11Mb/s
                   Bit Rate:12Mb/s
                   Bit Rate:18Mb/s
                   Bit Rate:24Mb/s
                   Bit Rate:36Mb/s
                   Bit Rate:48Mb/s
                   Bit Rate:54Mb/s
                   Extra:bcn_int=100
                   Extra:atim=0

- maybe dsl-3.4.8 could be updated to version 18 of the wireless extensions (I think 28 or 29 is current now)?
Quote
maybe dsl-3.4.8 could be updated to version 18...

And maybe DSL-4.2.4? :)

Quote
(I think 28 or 29 is current now)

Current is 29 but no support for 2.4 kernel beyond patches for 17 and 18.
http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Tools.html

Patch quick links:
v17: for kernel 2.4.29. Export driver event capacities, allow large scan requests and various minor fixes.
http://www.hpl.hp.com/persona....13.diff

v18: for kernel 2.4.30. WPA support, from Jouni Malinen. You will need WT-27-pre25 or later.
http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/iw240_we18-5.diff
Next Page...
original here.