From: Rickard Gunnarsson (rickard.gunnarsson_at_wlanalliance.com)
Date: 2002-08-21 15:02:15 UTC
Hi,
just wanted to let you know that I've solved this problem. My card used firmware 1.3.5. Upgrading to 1.4.9 solved everything. It seems that there's a bug in 1.3.5 making txpower behave strange (but only in AP mode, not in station mode), resulting in an extremely low signal level. This is obviously fixed in 1.4.9...
Rickard
> Hi,
>
> I've successfully installed the HostAp driver with a D-Link
DWL-650/DWL-500
> configuration, running Kernel 2.4.19.
>
> Setting the card in Managed mode everything works great and I get a fairly
> high link quality:
>
> iwconfig wlan0 gives:
>
> Warning : Device wlan0 has been compiled with version 13
> of Wireless Extension, while we are using version 12.
> Some things may be broken...
>
> wlan0 IEEE 802.11-DS ESSID:"default"
> Mode:Managed Frequency:2.437GHz Access Point:
00:50:18:05:A5:FA
> Bit Rate=11Mb/s Tx-Power:-6 dBm Sensitivity=1/3
> Retry min limit:8 RTS thr:off Fragment thr:off
> Encryption key:off
> Power Management:off
> Link Quality:80/92 Signal level:-53 dBm Noise level:-100 dBm
> Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
> Tx excessive retries:212 Invalid misc:15864 Missed beacon:0
>
>
> When setting the card in Master mode, i.e.
>
> iwconfig wlan0 mode Master essid test
>
> and checking the link quality with iwspy, I get:
>
> wlan0 Statistics collected:
> 00:02:2D:23:FE:49 : Quality:19/92 Signal level:-77 dBm Noise
level:-98
> dBm
> typical/average : Quality:0 Signal level:0 Noise level:0
>
> As you can see the link quality is very low. Checking my the link quality
on
> the other end (a windows machine) confirms the results.
>
> iwconfig at this stage gives:
>
> wlan0 IEEE 802.11-DS ESSID:"test"
> Mode:Master Frequency:2.422GHz Access Point: 00:05:5D:5B:BA:8A
> Bit Rate:2Mb/s Tx-Power:-6 dBm Sensitivity=1/3
> Retry min limit:8 RTS thr:off Fragment thr:off
> Encryption key:off
> Power Management:off
> Link Quality:0 Signal level:0 Noise level:0
> Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
> Tx excessive retries:7 Invalid misc:581 Missed beacon:0
>
> The Bit Rate is now 2Mb/s instead of 11Mb/s.....changing Tx-Power has no
> effect.... Any ideas?
>
> Regards,
>
> Rickard
>
>