Re: RTL 8187b - naughty behaviour

["Gábor Stefanik" <netrolller.3d@gmail.com>]

2010/4/22 Rogerio Luz Coelho <rogluz.news@gmail.com>:
> 2010/4/11 Gábor Stefanik <netrolller.3d@gmail.com>:
>> 2010/4/10 Rogerio Luz Coelho <rogluz.news@gmail.com>:
>>> 2010/4/10 Gábor Stefanik <netrolller.3d@gmail.com>:
>>>> On Sat, Apr 10, 2010 at 2:07 PM, Rogerio Luz Coelho
>>>> <rogluz.news@gmail.com> wrote:
>>>>> 2010/4/3 Rogerio Luz Coelho <rogluz.news@gmail.com>:
>>>>>> 2010/4/3 Larry Finger <Larry.Finger@lwfinger.net>:
>>>>>>> On 04/03/2010 11:49 AM, Rogerio Luz Coelho wrote:
>>>>>>>>
>>>>>>>> I have a MS-Win7 instalation on this Laptop and it works 100% even at
>>>>>>>> longer distances than you report,even with walls in between.
>>>>>>>>
>>>>>>>> Will do the tcpperf test as soon as I get home. There are other with
>>>>>>>> the same problem with my exact chip here in Brasil , that is because
>>>>>>>> one of our leading Laptop vendors uses this config.
>>>>>>>
>>>>>>> What is the exact make and model of the device? It might be difficult
>>>>>>> for me to get one in the US, but one of the rtl8187 developers lives in
>>>>>>> Brazil. He should be able to find one.
>>>>>>>
>>>>>>
>>>>>> It愀 a POSITIVO R430L - Core 2 Duo 4GB RAM
>>>>>>
>>>>>>
>>>>>>>> Does it matter that the USB port used in this setting is a connected
>>>>>>>> to a USB HUB and then to the mother board?
>>>>>>>
>>>>>>> Is the hub passive, or is it powered? If the hub is good and not
>>>>>>> underpowered, it should be OK.
>>>>>>>
>>>>>>>> More details and tests will come your way in a day or two ... will
>>>>>>>> reinstall Mandriva 2010 and do some tests with older kernels.
>>>>>>>
>>>>>>> If you can download an openSUSE 11.2 Live CD and burn it, you would not
>>>>>>> even have to do an installation. That one has a 2.6.31 kernel.
>>>>>>>
>>>>>>> Larry
>>>>>
>>>>>
>>>>> Downloaded and installed:
>>>>>
>>>>> OpenSuse 11.2 - LiveCD  result: Gnome Network-Manager tells me there
>>>>> is connection but no ping resposes, Firefox complains about conections
>>>>> errors.
>>>>>
>>>>> Mandriva 2010.0 (kernel 2.6.31-12) result: concection comes and goes
>>>>> ... generally the first boot of the day connects, but it lasts less
>>>>> than 5min. The error code is the "deauthentication by local reason
>>>>> (reason=3) again.
>>>>>
>>>>> MS-Win7 : connects and is as fast as ever.
>>>>>
>>>>> -- Any other suggestions?
>>>>>
>>>>> Rogerio
>>>>>
>>>>> PS: Will give OpenSuse a HD install atempt and will try to debug the
>>>>> Mandriva for some time, future tries involve Debian Stable (old
>>>>> kernel) and some Fedora (any suggestions?) and the NDISwrapper drive
>>>>> in a Debian Testing (the Distro I need working)
>>>>
>>>> Hi,
>>>>
>>>> Please also test Realtek's official r8187b driver. If possible, please
>>>> do an mmiotrace on that driver.
>>>
>>> Ok ... The official Realtek is only for 32bits systems right ? ( At
>>> least the guys at Realtek support told me so... ) and this mmiotrace
>>> can be accomplished how? Is it a program, a command, a debug message
>>> in some form? Sorry, as I said earlier I am NOT a kernel programer.
>>>
>>> Rogerio
>>>
>>
>> You need to enable MMIO tracing support in your kernel config, and
>> recompile your kernel (assuming it is not enabled already - distros
>> usually disable the entire tracing framework by default). Then:
>> -Mount debugfs to /debug. (Usually it is mounted by default, but some
>> distros like to mount it @ /sys/kernel/debug instead - remount it to
>> /debug.)
>> -"echo mmiotrace > /debug/tracing/current_tracer"
>> -"cat /debug/tracing/trace_pipe >  trace.txt &" - at this point, tracing begins.
>> -Load r8187b and connect.
>> -"echo "Driver loaded!" > /debug/tracing/trace_marker"
>> -"echo nop > /debug/tracing/current_tracer" - tracing ends here.
>>
>> Do this for rtl8187 as well.
>> After each trace, check if "grep -i lost trace.txt" returns anything.
>> If it does, enlarge the trace buffer and retry:
>> -"cat /debug/tracing/trace_buffer_kb"
>> -"echo [BUFSIZE] > /debug/tracing/trace_buffer_kb", where [BUFSIZE] is
>> recommended to be about twice the number returned by the previous
>> command.
>
> I installed a vanilla kernel 2.6.32.11 , config to rum mmio , but my
> rtl818x modules are loaded by default and the modprobe -r command
> doesn't seem to change this ... any ideas ?
>
> Rogerio

Did you build rtl8187 as a module? Otherwise modprobe -r can do nothing.

>
>
>>
>> Repeat these steps until the "lost events" warning disappears. Once
>> you find the right BUFSIZE for one driver, you can use the same size
>> for the other one too.
>>
>> Hth,
>> Gábor
>>
>> --
>> Vista: [V]iruses, [I]ntruders, [S]pyware, [T]rojans and [A]dware. :-)
>>
>



-- 
Vista: [V]iruses, [I]ntruders, [S]pyware, [T]rojans and [A]dware. :-)