Weird behaviour

[Kevin Gordon]

On Tue, Feb 14, 2012 at 11:43 AM, John Watlington <wad at laptop.org> wrote:

>
> Sounds like a signal integrity issue is forcing the USB to run at 10 Mbps
> on
> those two laptops.   Have you tried another USB stick ?   Or different
> ports on the
> malfunctioning laptops ?
>

All three ports act on each machine act consistently.
All 10 USB sticks act consistently.


>
> There is little on the motherboard which can affect these ports --- they
> run
> from the connector to the Via companion chip (VX855).   Perhaps this is
> due to ESD damage of the VX855 itself...
>

I have spare machines, would you be interested in my sending these back to
you for investigation? I can mail them down, my cost.

KG


> Regards,
> wad
>
> On Feb 14, 2012, at 8:47 AM, Kevin Gordon wrote:
>
> > No, this email is not about my generally weird behaviour, it's about a
> couple of my new XO 1.5's :-)
> >
> > I have 2 x XO 1.5's that seem to have a very slow USB transfer rate;
> like, I mean glacial.
> >
> > I use the same USB build sticks to build many XO 1.5's, but on these
> particular two it takes close to an hour to do a refresh, or sometimes just
> stops in the middle of the refresh block colour animation  - regardless of
> the stick used.  I have many times verified that the same sticks refresh in
> normal time, on about 8 other 1.5s.  All the XO's are currently at the
> default 883 build with q3b11 when doing this refresh test.  I then
> suspected maybe main memory, but then a refresh from the SD card slots on
> these same two suspect machines is lightning fast, (in fact way faster than
> I've ever seen using USB), and the machine seems to be successfully built.
>  However,  I've also then done just a USB copy from another stick down to
> the file system, and it too is really, really slow, if and when when it
> finishes.
> >
> > The standard short-cut key at boot-time diagnostics show no errors.
> >
> > Any hints?
> >
> > Thanks
> >
> > KG
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>
>
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