Thanks for your reply.
We have received your email.
In order to better understand this situation, we would like to address the following questions:
Could you clarify us if this situation happens with your design or with a third party motherboard? In case that it is related to a motherboard, could you please tell us the manufacturer and model of it? If it is your design, could please let us know the complete part number of the processor?
Could you please update the BIOS and drivers to the latest versions, replicate the listed circumstance, and let us know the effects of these changes? By the way, please provide us the name of the BIOS developer and versions related to the cited situation.
Could you please inform us if the problem occurs with specific or any USB high Speed device? In case that you disregard this information, please try to reproduce this problem with USB High Speed devices manufactured by different companies, also diverse characteristics, and inform us the outcomes. By the way, please give us all the information of the affected USB devices.
Please give us all the information requested through the previous questions to better understand this issue.
Thanks again for your cooperation to solve this case.
As noted in the original question, this is a confirmed problem in the Full Speed (12 Mbps) USB Device. What we are trying to to is impact the behavior of the Intel USB Host Controller to accommodate this Device. Ideally, we could get the USB Host Controller to increase the amount of time it takes to retry an IN command that is NAKed by the downstream Device.
Is there an engineer familiar with the Q87 chipset USB Host Controller that I can talk to about this issue?
Thanks for your clarification.
The information that may help you is stated in erratum 5, on page 12 of the Intel(R) 8/C220 Series Chipset Platform Controller Hub: Specification Update document # 328905.
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