Is it possible to solve duplicated PDO by filtering Get_Device_Descriptor?

NTDEV
1

Hi everyone,

I have usb devices with same ID & serial number which cause PnP error when two identical devices plug in. I want to create a filter driver below root hub driver to catch get device descriptor request. Anyone knows if it’s possible and how?

Any suggestion or discussion is appreciated.

2

Not possible. Fix your hw if possible. There is a registry key which tells the usb core to ignore serial numbers for a specific vid+pid, search for it, it should be pretty easy to find

d

-----Original Message-----
From: xxxxx@sunmedia.com.cn
Sent: Sunday, November 22, 2009 10:37 PM
To: Windows System Software Devs Interest List
Subject: [ntdev] Is it possible to solve duplicated PDO by filtering Get_Device_Descriptor?

Hi everyone,

I have usb devices with same ID & serial number which cause PnP error when two identical devices plug in. I want to create a filter driver below root hub driver to catch get device descriptor request. Anyone knows if it’s possible and how?

Any suggestion or discussion is appreciated.

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3

Thanks Doron. Your information is very important for me because, unfortunately, the hw code is fixed. Damn…

4

xxxxx@sunmedia.com.cn wrote:

Thanks Doron. Your information is very important for me because, unfortunately, the hw code is fixed.

If your manufacturing process is creating USB devices with identical
serial numbers, then your hardware is anything but “fixed”. It is broken.

Damn…

Yes. Your hardware people have made a mistake. This requirement has
never been a secret.

–
Tim Roberts, xxxxx@probo.com
Providenza & Boekelheide, Inc.