On Feb 03 2004, Alan Stern wrote:
> Rogério:
>
> I just came across some new information that might be relevant for
> your problem. Do you remember if your desktop system uses a USB
> controller by VIA? If it does, that would explain a lot. VIA
> controllers have a bug that causes them to shut down when they receive
> a packet that's too large ("babble"), and your internal port generates
> just such bad packets from time to time. They showed up in both the
> Windows and Linux logs.
Hi, Alan.
I'm not at home at the moment, but I can tell you that yes, the chipset
of my mainboard is a VIA chipset KT133 (not KT133A -- mine is older). I
don't know if the USB controller is also managed by the chipset or not,
but the chipset surely is made by VIA.
This sounds just right, since my old notebook has an Intel BX 400
chipset (or was that a ZX 400?) and I don't know if you remember my
earlier description, but the USB drive worked quite well with the
notebook (plugging & unplugging).
It seems like your diagnostics might be hitting the nail on the head
again (as usual).
> Just out of curiosity, maybe you can try this patch and see what shows
> up in the debugging log.
Ok. I'll try it when I get home and tell you the details.
> It enlarges the size of the packets the system asks for; maybe that
> will prevent the controller from shutting down.
BTW, not that it matters for me (since I know nothing about the details
of USB and have never programmed for low level devices), but wouldn't
the system making large requests make the internal port choke (according
to your first paragraph)? You are trying to see when it fails?
(I have not read the code -- I wouldn't understand it anyway). :-)
Anyway, I will (probably) get back to you later today when I get home.
Thank you very much, Rogério.
--
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Rogério Brito - [EMAIL PROTECTED] - http://www.ime.usp.br/~rbrito
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
-------------------------------------------------------
The SF.Net email is sponsored by EclipseCon 2004
Premiere Conference on Open Tools Development and Integration
See the breadth of Eclipse activity. February 3-5 in Anaheim, CA.
http://www.eclipsecon.org/osdn
_______________________________________________
[EMAIL PROTECTED]
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
