This suggests to me that the camera card (made by Roper) is timing
out, a USB reset then occurs almost immediately afterwards.
The odd thing is that the PCI card works fine with a different (much
slower) camera. I'm wondering whether the developers of the Roper
PCI driver are doing something odd to try and recover from this
timeout they've logged, which is in turn affecting the USB host
controller.
Anyway, thanks for your comments - I've passed this to the card
manufacturer now (though the solution for the customer may be just to
buy a G5)!
Cheers,
Steve.
On 26 Sep 2005, at 20:58, David Ferguson wrote:
You will need some good tools to get to the bottom of this type of
problem. Could an errant PCI device affect annother PCI device?
-- sure. Is that happening here? -- the only way to know will be
with a PCI bus analyzer.
First, you may want to install logging versions of the IOUSBFamily
-- use the logging tab of USB Prober to look at the USB log --
Also, check both the system and console logs for messages from the
relevant drivers.
I would contact the necessary vendors and see if they can provide
versions of their drivers to help you debug/analyze this problem.
What is the host you are using? Does this problem occur with all
machines, or just some configurations?
David Ferguson
Apple Computer
At 8:13 PM +0100 9/26/05, Steve Baxter wrote:
Hi,
We have a strange problem where initialising a PCI-based
scientific digital camera is causing writes to a USB serial
adapter (Keyspan) to hang our software. We are slightly stuck in
the middle of this (not having access to the driver source code of
either the PCI card or USB device), but my suspicion is that the
PCI driver is causing a USB reset, which is in turn getting the
Keyspan adapter into a strange state behind the back of the
Keyspan driver.
Does anyone know if a PCI device driver could cause a USB device
to stop working in this way? I guess that the USB controller is a
device on the PCI bus, but is there any way in which a PCI driver
could affect devices other than the ones they are supposed to be
controlling?
Cheers,
Steve.
Stephen Baxter
Software Development Manager
Improvision
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+44-2476-692229
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