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Re: [ipw3945-devel] iwl3945 doesn't work

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On Thu, Oct 18 2007, Stephen Clark wrote:
> Jens Axboe wrote:
>
>> On Wed, Oct 17 2007, Stephen Clark wrote:
>>  
>>> Jens Axboe wrote:
>>>
>>>    
>>>> On Wed, Oct 17 2007, Dan Williams wrote:
>>>>      
>>>>> On Wed, 2007-10-17 at 16:22 +0200, Jens Axboe wrote:
>>>>>          
>>>>>> On Wed, Oct 17 2007, Dan Williams wrote:
>>>>>>              
>>>>>>> On Wed, 2007-10-17 at 16:11 +0200, Jens Axboe wrote:
>>>>>>>                  
>>>>>>>> On Wed, Oct 17 2007, Ismail Dönmez wrote:
>>>>>>>>                      
>>>>>>>>> Wednesday 17 October 2007 Tarihinde 16:54:53 yazm????t??:
>>>>>>>>>                          
>>>>>>>>>> Hi,
>>>>>>>>>>
>>>>>>>>>> Seeing that iwl3945 is now merged, I decided to switch my x60 to 
>>>>>>>>>> use
>>>>>>>>>> that instead of ipw3945. That would leave me with zero kernel
>>>>>>>>>> dependencies.
>>>>>>>>>>
>>>>>>>>>> Unfortunately it doesn't work. Loading the module reveals the 
>>>>>>>>>> device:
>>>>>>>>>>
>>>>>>>>>> iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection 
>>>>>>>>>> driver for
>>>>>>>>>> Linux, 1.1.17ks
>>>>>>>>>> iwl3945: Copyright(c) 2003-2007 Intel Corporation
>>>>>>>>>> ACPI: PCI Interrupt 0000:03:00.0[A] -> GSI 17 (level, low) -> IRQ 
>>>>>>>>>> 21
>>>>>>>>>> PCI: Setting latency timer of device 0000:03:00.0 to 64
>>>>>>>>>> iwl3945: Detected Intel PRO/Wireless 3945ABG Network Connection
>>>>>>>>>> iwl3945: Tunable channels: 13 802.11bg, 23 802.11a channels
>>>>>>>>>> phy0: Selected rate control algorithm 'iwl-3945-rs'
>>>>>>>>>>
>>>>>>>>>> # iwconfig wlan0
>>>>>>>>>> wlan0     IEEE 802.11g  ESSID:"xxxxxxxxxxxxxx"
>>>>>>>>>>         Mode:Managed  Channel:0  Access Point: Not-Associated
>>>>>>>>>>         Tx-Power=0 dBm
>>>>>>>>>>         Retry min limit:7   RTS thr:off   Fragment thr=2346 B
>>>>>>>>>>         Encryption key:XXXX-XXXX-XX
>>>>>>>>>>         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
>>>>>>>>>>
>>>>>>>>>> and iwconfig sees it, essid/enc settings are fine, but I don't get 
>>>>>>>>>> a
>>>>>>>>>> link.
>>>>>>>>>>                              
>>>>>>>>> Same issue here, try iwlist wlan0 scan first and then it should 
>>>>>>>>> work.
>>>>>>>>>                          
>>>>>>>> Huh indeed, now it links fine! Thanks for the hint. Would be nice to
>>>>>>>> have fixed, though :-)
>>>>>>>>                      
>>>>>>> Odd, doesn't the driver need to do a scan _anyway_ to find the right
>>>>>>> BSSID to associate with if the cached scan results are more than a 
>>>>>>> few
>>>>>>> seconds old?  Can you run '/sbin/iwevent' before trying a fresh
>>>>>>> association, try to associate, ensure that it has failed, and report 
>>>>>>> the
>>>>>>> output?
>>>>>>>
>>>>>>> If you don't get something like:
>>>>>>>
>>>>>>> 10:17:05.117937   eth1     Scan request completed
>>>>>>>
>>>>>>> shown there, then there's likely a bug in the driver because it's 
>>>>>>> either
>>>>>>> (a) not scanning before trying to associate, or (b) not sending out 
>>>>>>> scan
>>>>>>> completion events after it's done a scan.
>>>>>>>                  
>>>>>> Indeed, there is now Scan request completed before I run the iwlist
>>>>>> scan. iwevent output:
>>>>>>              
>>>>> Hmm, the output below doesn't show the scan request completed, right?
>>>>>
>>>>>          
>>>>>> Waiting for Wireless Events from interfaces...
>>>>>> 16:20:27.453588   wlan0    Set Mode:Managed
>>>>>> 16:20:27.462104   wlan0    Set Encryption key:off
>>>>>> 16:20:27.463940   wlan0    Set Encryption key:****-****-**   Security 
>>>>>> mode:open
>>>>>> 16:20:27.466535   wlan0    Set ESSID:"kjellbergaxboe"
>>>>>>
>>>>>> waiting, nothing else happens. Then run iwlist scan from another
>>>>>> terminal.
>>>>>>
>>>>>> 16:20:53.892549   wlan0    Scan request completed
>>>>>>              
>>>>> So you only get this when you manually scan right after setting the 
>>>>> ssid
>>>>> and key?
>>>>>          
>>>> If you look at the time stamp, I ran the iwlist scan about 26 seconds
>>>> after loading the module. When the module is loaded, the networking
>>>> script sets the essid and encryption key.
>>>>
>>>> So yes, I only get that 'Scan request completed' line after running
>>>> iwlist scan manually.
>>>>
>>>>      
>>> Don't know whether this is related, but I was having all kinds of trouble 
>>> getting associated,
>>> iwlist eth1 scan would report no scan results, I then switched to loading 
>>> the kernel module with
>>> the option that tells  iwl3945 to do software scanning and it works 
>>> everytime now.
>>>    
>>
>> Which option is that?
>>
>>  
> In my modprobe.conf file:
> options iwl3945 disable_hw_scan=1

That option is already set here:

carl:/etc/modprobe.d # grep . iwlwifi 
options iwl3945 disable_hw_scan=1
options iwl4965 disable_hw_scan=1

-- 
Jens Axboe

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