Weird behaviour

John Watlington wad at
Tue Feb 14 11:43:39 EST 2012

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 ?

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...


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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