Re: Can't find AP (BT voyager 1010USB, Fedora Core 3 k: 2.6.10)

Hi Balint,

Thanks for the prompt reponse...

> ...but the first thing that popped into my head was enabling 
> International Roaming.

I tried "iwpriv wlan0 intl_roaming 1" with unfortunately hasn't made any 
difference to the problem.

> ...weird firmware?

I'm beginning to think this might be a problem although I would have no idea how to check it or fix it. I've just realised that when I boot in to Win XP after using the linux driver (trying to at least) the nic stops working. I have to uninstall & reinstall the windows driver before I can find any AP's again. Perhaps this process is overwriting the bad firmware with working firmware again?? Is that possible? My knowledge of such things is very limited.


> If that fails to rectify the situation, you might want to go into the
> at76c503.c source file and look for the line beginning with:
> 
> static int debug = ...
> ...
> This will enable pretty much everything... (be careful though as I have
> old source and I think Joerg has changed the names around slightly)

I have edited the line "#define DBG_DEFAULTS ..." to:

#define DBG_DEFAULTS ( all | of | the | items | defined | above)

Which should be the same as what you suggested (I believe) and recompiled/installed the drivers but I don't appear to have any more in the logs although I have noticed a "wlan0: no IPv6 routers present" line which I'm not sure if it is important:

usb 3-1: USB disconnect, address 5
/usr/todo/at76c503a/at76c503-fw_skel.c: wlan%d disconnecting
/usr/todo/at76c503a/at76c503-fw_skel.c: at76c503-i3861 disconnected
usb 3-1: new full speed USB device using uhci_hcd and address 6
/usr/todo/at76c503a/at76c503-fw_skel.c: using compiled-in firmware
/usr/todo/at76c503a/at76c503.c: $Id: at76c503.c,v 1.72 2004/10/19 20:45:25 jal2 Exp $ compiled Jan  4 2005 17:46:43
/usr/todo/at76c503a/at76c503.c: firmware version 0.90.0 #44 (fcs_len 4)
/usr/todo/at76c503a/at76c503.c: device's MAC 00:90:96:58:65:29, regulatory domain MKK1 (Japan) (id 65)
divert: allocating divert_blk for wlan0
/usr/todo/at76c503a/at76c503.c: registered wlan0
wlan0: no IPv6 routers present
/usr/todo/at76c503a/at76c503.c: wlan0: PRIV_IOCTL_SET_DEBUG input 9: 0x180003 -> x180003
/usr/todo/at76c503a/at76c503.c: wlan0: PRIV_IOCTL_SET_DEBUG, old 0x0  new 0x180003
/usr/todo/at76c503a/at76c503.c: wlan0: netif running 1 queue_stopped 1 carrier_ok 0
/usr/todo/at76c503a/at76c503.c: wlan0 handle_mgmt_timeout_scan:2021 got cmd_status 1 (istate 1, scan_runs 2)
/usr/todo/at76c503a/at76c503.c: wlan0 BSS table (curr=00000000, new=00000000):
/usr/todo/at76c503a/at76c503.c: wlan0: start_scan (use_essid = 1, intl = 0, channel = 1, probe_delay = 10000, scan_min_time = 10, scan_max_time = 120)
/usr/todo/at76c503a/at76c503.c: wlan0 handle_mgmt_timeout_scan:2021 got cmd_status 1 (istate 1, scan_runs 3)
/usr/todo/at76c503a/at76c503.c: wlan0 BSS table (curr=00000000, new=00000000):
/usr/todo/at76c503a/at76c503.c: wlan0: state 1 -> 6 (JOINING)
/usr/todo/at76c503a/at76c503.c: wlan0 find_matching_bss: returned 00000000
/usr/todo/at76c503a/at76c503.c: wlan0: state 6 -> 1 (SCANNING)
/usr/todo/at76c503a/at76c503.c: wlan0: start_scan (use_essid = 0, intl = 0, channel = 1, probe_delay = 10000, scan_min_time = 10, scan_max_time = 120)


> I found they were all very helpful when I was adding
> International Roaming & (quasi-)Monitor mode to the driver

Please could you explain the (quasi-)Monitor mode a bit more - how can I use this to troubleshoot the problem?


> Have you got access to a PCMCIA card (eg: rebadged Orinoco, 
> eg: Avaya) that you could use in true monitor mode with Ethereal 
> to analyse the beacon frames from your AP? Can anyone else 
> connect to your AP?

Unfortunately I don't have a PCMCIA card, however there are other 4 other machines on the network which can all access the AP - but from Win XP - also this machine can access from Win XP... but with the problems mentioned earlier.

Any ideas what I should ttry next??

Regards,

Haydn.



>Hi Haydn,
>
>I might be missing a totally obvious solution here (eg: some specific
>setting on your AP - tried with another AP?), but the first thing that
>popped into my head was enabling International Roaming.
>Although this probably wont do anything (your regulatory domain is MKK1
>which includes all the WiFi channels 1-14 anyway) it still might be worth a
>try (weird firmware?):
>
>You can either: insert the module into the kernel and append on the end of
>your 'modprobe' command:
>
>international_roaming=1
>
>or use iwpriv on the private ioctl 'intl_roaming' and set it to 1.
>
>If that fails to rectify the situation, you might want to go into the
>at76c503.c source file and look for the line beginning with:
>
>static int debug = ...
>
>What you'll want to do is set the 'debug' variable to a bitwise-OR
>combination of the debug bits you'll find above in the source. You'll
>probably find it especially helpful to show received beacons and other rx
>data of your choosing. If showing the BSS table isn't enabled, you should
>flick it on too. I found they were all very helpful when I was adding
>International Roaming & (quasi-)Monitor mode to the driver... For example:
>
>#define DBG_DEFAULTS (DBG_PROGRESS | DBG_PARAMS | DBG_BSS_TABLE |
>DBG_DEVSTART | DBG_BSS_MATCH | DBG_KEVENT | DBG_PROC_ENTRY | DBG_PM |
>DBG_WAIT_COMPLETE | DBG_BSS_TABLE_RM)
>#define DBG_TX_RX    (DBG_TX_DATA | DBG_TX_DATA_CONTENT | DBG_TX_MGMT |
>DBG_RX_DATA | DBG_RX_DATA_CONTENT | DBG_RX_MGMT | DBG_RX_BEACON |
>DBG_RX_CTRL | DBG_RX_MGMT_CONTENT | DBG_RX_FRAGS | DBG_URB |
>DBG_RX_ATMEL_HDR | DBG_RX_FRAGS_SKB )
>static int debug = DBG_DEFAULTS | DBG_IOCTL | DBG_TX_RX;
>
>This will enable pretty much everything... (be careful though as I have old
>source and I think Joerg has changed the names around slightly)
>
>Once you've changed the source, you'll obviously have to re-compile and
>install the modules again. Then just watch your syslog!
>
>Btw: turns out that the only reason I can connect to my Japanese (MKK1) AP
>on channel 6 from my USB WiFi adapter (regulatory region France, channels
>10-13) once I've enabled international roaming is because my AP actually
>broadcasts its own regulatory region! I believe if an AP doesn't broadcast
>this information then the Atmel firmware wont let you connect to a channel
>outside the adapter's own regulatory region. Have you got access to a PCMCIA
>card (eg: rebadged Orinoco, eg: Avaya) that you could use in true monitor
>mode with Ethereal to analyse the beacon frames from your AP? Can anyone
>else connect to your AP?
>
>Hope that helps & good luck!
>
>Balint
>
>  
>
>>-----Original Message-----
>>From: [email protected] [mailto:at76c503a-user-
>>[email protected]] On Behalf Of Haydn Haines
>>Sent: Wednesday, 5 January 2005 8:26 AM
>>To: [email protected]
>>Subject: [at76c503a-user] Can't find AP (BT voyager 1010USB, Fedora Core 3
>>k: 2.6.10)
>>
>>Hi All,
>>
>>I'm having problems getting the berlios driver working and would really
>>appreciate some help. To me the problem appears to be a problem matching
>>my wireless card & access points settings - but I'm not sure what I'm
>>missing.
>>
>>NOTE: This is a dual boot machine and the nic can see the AP with
>>excellent reception  in win XP so that is not an issue.
>>
>>FYI I'm running:
>>
>>    Distro:               Fedore Core 3
>>    Kernel:              2.6.10 (no patches)
>>    Driver ver:         v1.72? Unsure - CVS from approx 2 weeks ago
>>    wlan0 Device:    BT Voyager 1010 USB (VID: 0x69a, PID: 0x821)
>>    AP:                    BT Voyager 2020
>>
>>After make; make install is succesful and plugging in the device
>>everything appears ok:
>>
>>[root@U4ea log]# tail -5 messages
>>Jan  4 19:27:02 U4ea kernel: usb 3-1: new full speed USB device using
>>uhci_hcd and address 6
>>Jan  4 19:27:03 U4ea kernel: /usr/todo/at76c503a/at76c503.c: $Id:
>>at76c503.c,v 1.72 2004/10/19 20:45:25 jal2 Exp $ compiled Jan  4 2005
>>17:46:43
>>Jan  4 19:27:03 U4ea kernel: /usr/todo/at76c503a/at76c503.c: firmware
>>version 0.90.0 #44 (fcs_len 4)
>>Jan  4 19:27:03 U4ea kernel: /usr/todo/at76c503a/at76c503.c: device's
>>MAC 00:90:96:58:65:29, regulatory domain MKK1 (Japan) (id 65)
>>Jan  4 19:27:03 U4ea kernel: /usr/todo/at76c503a/at76c503.c: registered
>>wlan0
>>
>>[root@U4ea log]# lsmod |grep at76
>>at76c503_i3861         32772  0
>>at76c503              100576  1 at76c503_i3861
>>at76_usbdfu             6020  1 at76c503
>>
>>
>>And the configuration also looks fine:
>>
>>[root@U4ea log]# iwpriv wlan0 set_debug 0x180003
>>[root@U4ea log]# iwconfig wlan0 mode managed channel 1 essid greenhill
>>[root@U4ea log]# iwconfig wlan0
>>wlan0     IEEE 802.11-DS  ESSID:"greenhill"  Nickname:"okuwlan"
>>          Mode:Managed  Frequency:2.412GHz  Access Point:
>>00:00:00:00:00:00
>>          Bit Rate:11Mb/s   Tx-Power=15 dBm
>>          Retry limit:8   RTS thr=1536 B   Fragment thr=1536 B
>>          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:0  Invalid misc:0   Missed beacon:0
>>
>>
>>[root@U4ea log]# ifconfig wlan0 netmask 255.255.255.240 192.168.1.5
>>[root@U4ea log]# ifconfig wlan0
>>wlan0     Link encap:Ethernet  HWaddr 00:90:96:58:65:29
>>          inet addr:192.168.1.5  Bcast:192.168.1.255  Mask:255.255.255.240
>>          inet6 addr: fe80::290:96ff:fe58:6529/64 Scope:Link
>>          UP BROADCAST  MTU:1500  Metric:1
>>          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>>          TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
>>          collisions:0 txqueuelen:1000
>>          RX bytes:0 (0.0 b)  TX bytes:168 (168.0 b)
>>
>>
>>As soon as I've run ifconfig my /var/log/kern.debug file starts filling
>>up with unsucessful scans:
>>
>>[root@U4ea log]# tail -15 kern.debug
>>Jan  4 19:32:38 U4ea kernel: /usr/todo/at76c503a/at76c503.c: wlan0
>>find_matching_bss: returned 00000000
>>Jan  4 19:32:38 U4ea kernel: /usr/todo/at76c503a/at76c503.c: wlan0:
>>state 6 -> 1 (SCANNING)
>>Jan  4 19:32:38 U4ea kernel: /usr/todo/at76c503a/at76c503.c: wlan0:
>>start_scan (use_essid = 0, intl = 0, channel = 1, probe_delay = 10000,
>>scan_min_time = 10, scan_max_time = 120)
>>Jan  4 19:32:38 U4ea kernel: /usr/todo/at76c503a/at76c503.c: wlan0
>>handle_mgmt_timeout_scan:2021 got cmd_status 1 (istate 1, scan_runs 2)
>>Jan  4 19:32:38 U4ea kernel: /usr/todo/at76c503a/at76c503.c: wlan0 BSS
>>table (curr=00000000, new=00000000):
>>Jan  4 19:32:38 U4ea kernel: /usr/todo/at76c503a/at76c503.c: wlan0:
>>start_scan (use_essid = 1, intl = 0, channel = 1, probe_delay = 10000,
>>scan_min_time = 10, scan_max_time = 120)
>>Jan  4 19:32:38 U4ea kernel: /usr/todo/at76c503a/at76c503.c: wlan0
>>handle_mgmt_timeout_scan:2021 got cmd_status 1 (istate 1, scan_runs 3)
>>Jan  4 19:32:38 U4ea kernel: /usr/todo/at76c503a/at76c503.c: wlan0 BSS
>>table (curr=00000000, new=00000000):
>>Jan  4 19:32:38 U4ea kernel: /usr/todo/at76c503a/at76c503.c: wlan0:
>>state 1 -> 6 (JOINING)
>>Jan  4 19:32:38 U4ea kernel: /usr/todo/at76c503a/at76c503.c: wlan0
>>find_matching_bss: returned 00000000
>>Jan  4 19:32:38 U4ea kernel: /usr/todo/at76c503a/at76c503.c: wlan0:
>>state 6 -> 1 (SCANNING)
>>Jan  4 19:32:38 U4ea kernel: /usr/todo/at76c503a/at76c503.c: wlan0:
>>start_scan (use_essid = 0, intl = 0, channel = 1, probe_delay = 10000,
>>scan_min_time = 10, scan_max_time = 120)
>>Jan  4 19:32:38 U4ea kernel: /usr/todo/at76c503a/at76c503.c: wlan0
>>handle_mgmt_timeout_scan:2021 got cmd_status 1 (istate 1, scan_runs 2)
>>Jan  4 19:32:38 U4ea kernel: /usr/todo/at76c503a/at76c503.c: wlan0 BSS
>>table (curr=00000000, new=00000000):
>>Jan  4 19:32:38 U4ea kernel: /usr/todo/at76c503a/at76c503.c: wlan0:
>>start_scan (use_essid = 1, intl = 0, channel = 1, probe_delay = 10000,
>>scan_min_time = 10, scan_max_time = 120)
>>
>>
>>I've also tried to set the AP manually with iwconfig, but it still shows
>>00:00:00:00:00:00 for the AP after running:
>>
>>[root@U4ea ~]# iwconfig wlan0 ap 00:90:96:62:F7:C3
>>
>>
>>Please could someone advise me what I should try next to troubleshoot
>>the problem? If you require any further logs please ask and I shall post
>>them asap.
>>
>>Thanks in advance for your help,
>>
>>Haydn.
>>
>>_______________________________________________
>>at76c503a-user mailing list
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>>http://lists.berlios.de/mailman/listinfo/at76c503a-user
>>    
>>
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