Re: Iso ep Issue : win xp on virtualbox4.2 inubuntu-14.04-x64, iso endpoint receive error frames.

thank you for quick reply.
i will test on real pc.


------------------ Original ------------------
From:  "xiaofanc";<[email protected]>;
Date:  Thu, Apr 16, 2015 02:25 PM
To:  "libusb-win32-devel"<[email protected]>; 

Subject:  Re: [Libusb-win32-devel] Iso ep Issue : win xp on virtualbox4.2 inubuntu-14.04-x64, iso endpoint receive error frames.



On Wed, Apr 15, 2015 at 3:00 PM, linucos <[email protected]> wrote:
> hi, there
>      A strange issue with libusbk: not all frames are error, only some
> frames is error.
>      Logs like:
>      "ISO StartFrame=0009771Ah NumberOfPackets=64 ErrorCount=7
> Transferred=969
> ISO StartFrame=0009775Ah NumberOfPackets=64 ErrorCount=7 Transferred=969
> ISO StartFrame=0009779Ah NumberOfPackets=64 ErrorCount=8 Transferred=952
> ISO StartFrame=000977DAh NumberOfPackets=64 ErrorCount=7 Transferred=969
> ISO StartFrame=0009781Ah NumberOfPackets=64 ErrorCount=7 Transferred=969
> ISO StartFrame=0009785Ah NumberOfPackets=64 ErrorCount=4 Transferred=1020
> ISO StartFrame=0009789Ah NumberOfPackets=64 ErrorCount=5 Transferred=1003
> ISO StartFrame=000978DAh NumberOfPackets=64 ErrorCount=6 Transferred=986"
>    .
>    Other endpoints work well.
>
>    Thans for any idea.
>    By the way, same xp iso, same application, same driver, not work on
> VMWare.

Could you test on a real PC and not virtual machine? If the problem
does not exist on a real PC, I will think it is a problem with the
Virtual Machine's simulated USB driver stack.

-- 
Xiaofan

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