(OT) Flaky USB Bus

Bill McGonigle bill at bfccomputing.com
Thu Nov 20 21:08:20 EST 2008


On 2008-11-20 8:15 AM, paul.cour1 at verizon.net wrote:
>
> May we assume that if a typical USB device plugged in to
> a Win XP (SP 2) machine and seems to work, would that "probably"
> indicate that the USB interface (cable/controller) is "squeekie clean"?

Nope.  I've had USB controllers fail under load and work fine under 
'normal' use.  Big RAID rebuilds would throw them into a fit, e.g. That 
was a Compaq/Emachines motherboard (same difference).

I suspect very large bitmap transfers to a printer could do something 
similar if the printer's buffer could keep up.

On the replacement mobo in that same machine (which empirically works 
perfectly) the linux logs occasionally complain about the bus resetting. 
  I suspect it's recovering well enough that I never see problems.  Or 
maybe this is just SNAFUSB.  How that releates to Windows I have no idea.

-Bill



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