Thread: [Ndiswrapper-general] Should 'iwlist scan' work with NDISWRAPPER?
Status: Beta
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From: David C. <dav...@ve...> - 2006-08-18 14:53:15
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I've got two (Debian) Linux boxes that use NDISWRAPPER (and one that doesn't). On both the NDISWRAPPED ones, the (root) cmd: 'iwlist scan' always returns 'No scan results'. My question is: Is this a KNOWN/EXPECTED limitation? (i.e. for ALL NDISWRAPPED drivers) [Or is my choice of USB-wireless adapters just unlucky?] TIA... Dave |
From: Michael J. K. <ja...@co...> - 2006-08-18 16:49:43
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David Cook wrote: > I've got two (Debian) Linux boxes that use NDISWRAPPER (and one that > doesn't). > > On both the NDISWRAPPED ones, the (root) cmd: > 'iwlist scan' > always returns 'No scan results'. > > My question is: > Is this a KNOWN/EXPECTED limitation? (i.e. for ALL NDISWRAPPED drivers) > [Or is my choice of USB-wireless adapters just unlucky?] > > TIA... > > Dave > > > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job easier > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > _______________________________________________ > Ndiswrapper-general mailing list > Ndi...@li... > https://lists.sourceforge.net/lists/listinfo/ndiswrapper-general > > Yes, iwlist works with the ndiswrapper module; at least it does on my two boxes that use it. My command, however, that I use is iwlist wlan0 scan, where wlan0 is your wireless interface setup by ndiswrapper. Also, there are recent new versions of ndiswrapper; I had to upgrade for use with my 64 bit kernel. |
From: Jim C. <jim...@gm...> - 2006-08-18 18:16:26
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David Cook wrote: > I've got two (Debian) Linux boxes that use NDISWRAPPER (and one that > doesn't). > > On both the NDISWRAPPED ones, the (root) cmd: > 'iwlist scan' > always returns 'No scan results'. > > My question is: > Is this a KNOWN/EXPECTED limitation? (i.e. for ALL NDISWRAPPED drivers) > [Or is my choice of USB-wireless adapters just unlucky?] > yes, it works. wlan0 Scan completed : Cell 01 - Address: 00:14:BF:0F:9D:34 ESSID:"linksys_SES_50814" Protocol:IEEE 802.11b Mode:Managed Frequency:2.417 GHz (Channel 2) Quality:0/100 Signal level:-45 dBm Noise level:-256 dBm 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 Extra:bcn_int=100 Extra:atim=0 Cell 02 - Address: 00:03:93:EA:3F:A9 ESSID:"Apple Network ea3fa9" Protocol:IEEE 802.11b Mode:Managed Frequency:2.442 GHz (Channel 7) Quality:0/100 Signal level:-48 dBm Noise level:-256 dBm Encryption key:off Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s Extra:bcn_int=100 Extra:atim=0 IIUC, Luck does have something to do with it, particularly in the details. Note that Quality is 0, presumably the windows driver doesnt support that operation. FWIW, native drivers vary too.. on my laptop (in the same room as the above box) I only see 1 AP once Im connected (to it) when I have no link, I can see others too, like "Apple Network ea3fa9" above. Id love to see details like this on the wiki, but the only practical way is to upload it via script, parse it on the wiki, and stuff the relevant bits into a table. Anyone know how to do that with mediawiki ? |
From: Jan E. <je...@li...> - 2006-08-18 20:17:44
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>wlan0 Scan completed : > Cell 01 - Address: 00:14:BF:0F:9D:34 > ESSID:"linksys_SES_50814" > Protocol:IEEE 802.11b > Mode:Managed > Frequency:2.417 GHz (Channel 2) > Quality:0/100 Signal level:-45 dBm Noise >level:-256 dBm What I don't understand (it's not limited to ndiswrapper, one particular card or vendor) is when the signal level is at -45 yet the noise is at -256, why -45 still are not enough for at least some Link Quality. Jan Engelhardt -- |
From: Giridhar P. <pg...@ya...> - 2006-08-18 20:52:22
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--- Jan Engelhardt <je...@li...> wrote: > What I don't understand (it's not limited to ndiswrapper, one particular > card or vendor) is when the signal level is at -45 yet the noise is at > -256, why -45 still are not enough for at least some Link Quality. NDIS doesn't have a way to obtain link quality; rather, there is a way to obtain 'wireless statistics' that give information such as number of duplicate frames, number of times a frame was tried more than once etc. These are used to compute pseudo-link-quality by ndiswrapper. Moreover, wireless statistics information is valid for the station associated only; so if card is not associated, no link quality is reported by ndiswrapper. And there is no way to obtain noise level at all, so it is always shown as -256. Giri __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com |