linux-kernel - Problem with a Driver rt73 in ad-hoc mode betwwen a arm and a pc

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Date:	Sun, 21 Oct 2007 14:53:19 +0200
From:	Bruno Vetel <bruno.vetel@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Problem with a Driver rt73 in ad-hoc mode betwwen a arm and a pc

Hello

My board is based on a at91rm9200. I try to connect a dongle wifi
DWL-G122 (rt73usb) driver in Ad-Hoc mode with a PC ( dongle linksys
rt73usb but the ubuntu version). I trie also this version on my board
and the cvs versions with the same problem

My kernel is a 2.6.23.1 with little modifications to support my board
which is very closed to the at91rm9200-EK.

In Managed mode, the dongle works perfectly and I ping a router without
any problem


In Ad-hoc mode, on the at91 board the cell is detected but I don't see
any transfer. In debug mode, it seems that beacon and cell are detected
but only after the driver triggers a new scan.


The following commands show you the status.

~ $ iwconfig wlan0
wlan0     IEEE 802.11b  ESSID:"essid3"  
          Mode:Ad-Hoc  Frequency:2.422 GHz  Cell: 32:C7:99:28:44:17   
          Tx-Power=27 dBm   
          Retry min limit:7   RTS thr:off   Fragment thr=2346 B   
          Encryption key: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:0  Invalid misc:0   Missed beacon:0


iwlist scanning

	...

           Cell 04 - Address: 32:C7:99:28:44:17
                    ESSID:"essid3"
                    Mode:Ad-Hoc
                    Channel:3
                    Frequency:2.422 GHz (Channel 3)
                    Quality=50/100  Signal level=-58 dBm  
                    Encryption key:off
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
                    Extra:tsf=f78c0070f78c0078
ifconfig wlan0

wlan0     Link encap:Ethernet  HWaddr 00:17:9A:76:93:E9  
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)





On the PC :

iwconfig wlan0
wlan0     RT73 WLAN  ESSID:"essid3"  
          Mode:Ad-Hoc  Frequency=2.422 GHz  Cell: EE:1D:2B:1C:D0:59   
          Bit Rate=11 Mb/s   
          RTS thr:off   Fragment thr:off
          Link Quality=100/100  Signal level:-26 dBm  Noise level:-115
dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

and after some times

wlan0     RT73 WLAN  ESSID:"essid3"  
          Mode:Ad-Hoc  Frequency=2.422 GHz  Cell: 5A:C9:DA:E5:83:31   
          Bit Rate=11 Mb/s   
          RTS thr:off   Fragment thr:off
          Link Quality=0/100  Signal level:-121 dBm  Noise level:-115
dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0


ifconfig wlan0

wlan0     Lien encap:Ethernet  HWaddr 00:18:F8:2C:B8:8D  
          adr inet6: fe80::218:f8ff:fe2c:b88d/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Packets reçus:15 erreurs:0 :0 overruns:0 frame:0
          TX packets:174 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000 
          Octets reçus:1805 (1.7 KiB) Octets transmis:15448 (15.0 KiB)

On the board the modules loaded are

rc80211_simple          6720  1 
rt73usb                25088  0 
rt2x00usb              11872  1 rt73usb
rt2x00lib              21568  2 rt73usb,rt2x00usb
mac80211              179160  3 rc80211_simple,rt2x00usb,rt2x00lib
cfg80211               15624  1 mac80211
ohci_hcd               23572  0 
g_ether                27084  0 


I added my config file. I'm stuck


I'm stuck here. can anybody help me ?


	Thanks


	Bruno




View attachment "config" of type "text/plain" (28721 bytes)