[OLPC-devel] Re: LinuxBIOS and integrated system debug status (Friday night).

[Jim Gettys]

There are quite a few errata in the Geode manual on USB; I remember
taking a look at the errata sheet some months back.  And that is just
the Geode side; I don't know that USB device vendors are all that much
better.

I guess the question is how to start keeping track of which devices are
creating problems, and how to see how many of the USB errata/device
interactions can be fixed in software.

So, are we concluding that what I saw (that I could not mount the file
system after a improper shutdown) is a USB problem and not a LinuxBIOS
problem?  It sounds like we should from the information as I understand
it.

We may need to invest in hardware specific to diagnosing USB; I presume
such equipment must exist.  Mitch, are there any magic machines for USB
diagnosis?

                                 - Jim



On Sat, 2006-08-26 at 14:28 +0100, David Woodhouse wrote:
> On Sat, 2006-08-26 at 05:36 -0500, Richard Smith wrote:
> > What I _have_ seen though are times when the key either just will not
> > mount.  Unknown error -2 or maybe -6.  I'll note it next time it
> > happens.  A reset button hit has always fixed this.  Same board same
> > key. 
> 
> That's probably just the USB flakiness which has been biting everyone.
> Going from Insyde BIOS to LinuxBIOS helped me a lot -- it meant that it
> didn't bite me on _every_ boot, but I was still seeing various USB
> errors.
> 
-- 
Jim Gettys
One Laptop Per Child

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