Sergij Kolisnyk wrote:
>
> Hi!
>
> All we know the problem.
>
> On _some_ motherboards when doing USB bulk read at full speed,
> URB completes with "-84" error code...
>
-84 (EILSEQ) means CRC Error of the packet sent by the device.
So I think this is a problem of the device and not of the HC.
- Roman
> That happens only when device is fast enough to really utilyze
> throughput of USB 1.1 full speed.
>
> IMHO, this error may depend on BIOS, VGA and having X running...
> Error isn't HCI-specific, it occurs on both OHCI and UHCI.
>
> FAQ: How to workaround this error?
> May be usb.c has to have URB-wrapper to suppress the error?
> Isn't Linux overuse USB frame duration?
>
> I haven't found the answer anywhere...
>
> Thank you,
> Sergij Kolisnyk
>
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