Re: RTL 8187b - naughty behaviour

[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


>
> 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. :-)
>