Hello Marcel,
> Hi Frederic,
> 
>> I am working with BlueZ 3.22, kernel 2.6.24 on ARM and found 2 problems :
>>
>> -  I am not able to pair with some phones (Nokia N70 and sony-ericsson 
>> P800). After some investigations, I found that a "L2CAP information 
>> request packet" is sent just after the ACL connection. Both phones reply 
>> with "command rejected" error, then disconnect the ACL link before BlueZ 
>> is able to finish the pairing (see attached traces).
>>
>> - with some other phones (LG 990 Viewty and sony-ericsson T610), the 
>> kernel crashes after pairing initiated by the phone is completed.
>>
>> For the first problem I removed the send of the "L2CAP information 
>> request packet" in the kernel (see attached patch). This fixes both 
>> problems.
>>
>> I did not found any usage of the remote L2CAP information in kernel.
>> Is sending "L2CAP information request packet" mandatory for upper layer 
>> and/or qualification ?
>> Is my fix OK ?
> 
> sending the L2CAP info is just fine. It should not cause any problems. I
> think it is the pairing code that does some weird things at the wrong
> time. Can you test with bluetooth-testing.git against bluez-4.28 to
> verify that this issue still exists.

I try multiple configuration to test these 2 problems :

- pairing out failure with P800 or N70 :
   - Ubuntu 8.04 + kernel 2.6.24.23 + BlueZ 3.26 => unable to pair (see Ubuntu804_Bluez326_traces.txt)
   - Ubuntu 8.04 + kernel 2.6.24.23 + BlueZ 4.28 => unable to pair (see Ubuntu804_Bluez428_traces.txt)
   - Ubuntu 8.10 + kernel 2.6.27.11 + BlueZ 4.12 => pairing OK (see Ubuntu810_Bluez412_traces.txt)

   To perform pairing I use :
   BlueZ 3.26 : dbus-send --system --type=method_call --print-reply --dest=org.bluez /org/bluez/hci1 org.bluez.Adapter.CreateBonding string:00:0A:D9:14:D0:85
   BlueZ 4.xx : bluez-4.xx/test/simple-agent hci0 00:0A:D9:14:D0:85

- kernel crash with LG 990 :
   - Ubuntu 8.04 + kernel 2.6.24.23 + BlueZ 3.26 => Ubuntu freeze (kernel crash)
   - Ubuntu 8.04 + kernel 2.6.24.23 + BlueZ 4.28 => Ubuntu freeze (kernel crash)
   - Ubuntu 8.10 + kernel 2.6.27.11 + BlueZ 4.12 => pairing OK

So, for me, it seems to be a problem in the kernel 2.6.24.
What is your opinion ?

Unfortunately, I am not able to change kernel version. Do you have any idea how to fix this, please ? Is my fix OK ?

Regards

Fred


-- 
-----------------------------------------------
It is not by improving the oil lamp that one invents the electric bulb!
-----------------------------------------------
Danis Frederic                   Access Company
Software engineer
Mail : mailto:frederic.danis@access-company.com
-----------------------------------------------