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Microsoft USB Blog
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11.8K

Introducing the USB4™ Switch

Philip Froese on Sep 17 2019 11:49 AM
21.3K

UCSI based USB Type-C systems may see a shutdown delay if connect changes race with power transition

Philip Froese on Jun 24 2019 04:20 PM
My system takes a long time to power down if a USB Type-C device, dock, or charger is plugged in or unplugged during the...
14.1K

Debugging UCSI firmware failures

Rajib Dutta on Nov 06 2018 06:24 PM
8,499

Introducing USB Type-C Connector System Software Interface (UCSI) Class Extension

Rajib Dutta on Nov 06 2018 03:52 PM
USB Type-C System Software Interface Class Extension
3,028

Bringing Device Support to Windows Containers

Shyamal Varma on Oct 12 2018 03:57 PM
First published on MSDN on Sep 05, 2018 We’ve been working with several different feature teams within Microsoft to enab...
13.4K

Running USB Type-C System HLK tests with the Type-C MUTT

Shyamal Varma on Oct 12 2018 03:57 PM
First published on MSDN on Jun 05, 2018 Authored by Philip Froese [MSFT][Last updated July 13, 2018]In the next release ...
2,633

The HMD Exerciser Kit- A Test Kit for VR HMDs

Shyamal Varma on Oct 12 2018 03:56 PM
First published on MSDN on Jan 19, 2018 Authored by Matthew Hartman [MSFT] To support the wave of VR HMDs coming to mark...
4,481

Reading Driver Logs in USB Type-C HLK Tests

Shyamal Varma on Oct 12 2018 03:55 PM
First published on MSDN on Aug 03, 2017 Authored by Philip Froese [MSFT]Newly added in the RS3 preview builds of the HLK...
2,983

Using UsbCApiCmd for basic USB Type-C validation

Shyamal Varma on Oct 12 2018 03:53 PM
First published on MSDN on Feb 01, 2017 Authored by Michelle Bergeron [MSFT]UsbCApiCmd is a simple tool that you can use...
3,623

Setting up an environment to run USB Type-C system HLK tests

Shyamal Varma on Oct 12 2018 03:53 PM
First published on MSDN on Jul 06, 2016 Authored by Michelle Bergeron [MSFT] and Makarand Sonare [MSFT][Last updated 10/...
3,767

Do I need to write a driver for my USB Type-C hardware?

Shyamal Varma on Oct 12 2018 03:52 PM
First published on MSDN on Jun 20, 2016 Authored by Michelle Bergeron [MSFT]Windows 10 introduced support for the USB Ty...
3,936

Filing USB feedback with Repro Mode in Windows 10

Shyamal Varma on Oct 12 2018 03:52 PM
First published on MSDN on Aug 17, 2015 Authored by Michelle Vogel [MSFT]Feedback from users is one of the many ways the...
15.1K

What is new with Serial in Windows 10

Shyamal Varma on Oct 12 2018 03:49 PM
First published on MSDN on Jul 29, 2015 Authored by George Roussos [MSFT]The Serial Communication protocol is everywhere...
5,850

USB tests in the Windows 10 Hardware Lab Kit (HLK)

Shyamal Varma on Oct 12 2018 03:49 PM
First published on MSDN on May 14, 2015 The purpose of this blog post is to provide a resource with solutions to common ...
2,343

New in Windows 10: USB Dual Role on Mobile

Shyamal Varma on Oct 12 2018 03:48 PM
First published on MSDN on May 11, 2015 Authored by Andrea Keating [MSFT] Have you ever wanted to watch the video that w...
4,768

New in Windows 10: USB Dual Role, Type-C, SuperSpeedPlus, and much more…

Shyamal Varma on Oct 12 2018 03:48 PM
First published on MSDN on May 11, 2015 Authored by Fred Bhesania [MSFT]Hi everyone!The USB team is excited to share new...
7,147

Announcing the availability of a standalone legacy 1394 OHCI (FireWire) package

Shyamal Varma on Oct 12 2018 03:47 PM
First published on MSDN on Sep 10, 2014 By Koichi Hirao [MSFT]We are pleased to announce the immediate availability of a...
6,842

Capturing USB Debug Traces

Shyamal Varma on Oct 12 2018 03:47 PM
First published on MSDN on Sep 02, 2014 By Philip Froese [MSFT][Update 11/2016] The commands outlined in this post are n...
8,921

How to Capture and Read HID Traces in Windows 8.1

Shyamal Varma on Oct 12 2018 03:47 PM
First published on MSDN on Mar 14, 2014 By Andrea Keating [MSFT] and Arvind Aiyar [MSFT] A common class of USB devices i...
3,610

Reducing the size of HID descriptors

Shyamal Varma on Oct 12 2018 03:47 PM
First published on MSDN on Feb 13, 2014 Authored by Arvind Aiyar [MSFT] One of the descriptors that a USB HID device nee...
3,525

Windows 8.1: USB MIDI Device Works on USB 2.0 Port, Doesn’t Work on USB 3.0 Port

Shyamal Varma on Oct 12 2018 03:46 PM
First published on MSDN on Jan 21, 2014 Last update: September 2nd 2014Note: A fix for this issue is included in August ...
3,991

Help! After installing Windows 8.1, my device fails with error code 19

Shyamal Varma on Oct 12 2018 03:45 PM
First published on MSDN on Dec 10, 2013 Authored by Eliyas Yakub [MSFT]One of the common issues reported in Microsoft an...
7,056

Why does my USB device work on Windows 8.0 but fail on Windows 8.1 with code 43?

Shyamal Varma on Oct 12 2018 03:44 PM
First published on MSDN on Nov 25, 2013 Authored by Martin Borve [MSFT]Updated 1/27/2014 by Philip Ries to show how to u...
21.5K

Link Power Management (LPM) in USB 2.0

Shyamal Varma on Oct 12 2018 03:43 PM
First published on MSDN on Nov 15, 2013 Authored by Vivek Gupta [MSFT]In this blog, I’ll provide an overview of the USB ...
5,887

Capturing USB ETW traces with Microsoft Message Analyzer (MMA)

Shyamal Varma on Oct 12 2018 03:43 PM
First published on MSDN on Nov 08, 2013 Authored by Andrea Keating [MSFT] & Eliyas Yakub [MSFT][Updated 4/24/2017 with n...
4,122

Help! After installing Windows 8.1, my USB device doesn't charge or it disconnects and reconnects frequently...

Shyamal Varma on Oct 12 2018 03:41 PM
First published on MSDN on Nov 08, 2013 Authored by MJ Bustamante [MSFT] In Windows 8.
7,404

Help! After installing Windows 8.1, my USB drive disappears or file transfers stop unexpectedly…

Shyamal Varma on Oct 12 2018 03:40 PM
First published on MSDN on Oct 31, 2013 Authored by Jim Bovee [MSFT]Last update: April 17, 2014Note: The registry workar...
2,710

Help! After installing Windows 8.1, the SuperSpeed ports of my ASUS system don’t work…

Shyamal Varma on Oct 12 2018 03:39 PM
First published on MSDN on Oct 18, 2013 Authored by Eliyas Yakub [MSFT] Most ASUS systems have a built-in utility named ...
3,189

Debugging your USB Windows Store app with TraceView

Shyamal Varma on Oct 12 2018 03:38 PM
First published on MSDN on Jul 03, 2013 Authored by Philip Ries [MSFT]Last week, at the Microsoft Build Developer Confer...
6,248

How to include and view WPP trace messages in a driver’s public PDB files

Shyamal Varma on Oct 12 2018 03:38 PM
First published on MSDN on Jun 28, 2013 Authored by Eliyas Yakub [MSFT] and Robert Zhao [MSFT]Most Microsoft-provided dr...

Latest Comments

frank_1020
in What is new with Serial in Windows 10 on Feb 28 2023 04:35 PM
Hi Shyamal Varma, A Symptom Is Found During usb Debugging, our usb 3.0 device whitch is shown as an acm interface in windows10.While sending data from windows10 to our device, if the transmitted data is a multiple of 1024, the usbser.sys does not send zero packets, the usb protocol specifies that th...
0 Likes
AliMohyudin
in New in Windows 10: USB Dual Role, Type-C, SuperSpeedPlus, and much more… on Feb 21 2023 11:18 AM
Hi,can I configure my windows 10 IoT Enterprise to use Micro-USB port (OTG supported) and connect other end with Windows 10 Pro and expect my IoT to appear as anything like IpOverInternet or Storage Device? ThanksAli
0 Likes
RonnAndreasen
in How does USB stack enumerate a device? on Dec 11 2022 02:31 AM
Dear all USB Users, (unsure that this is the right forum for my question...) > Is there a way to programmatically "Recover Unused and FIX COM Numbers" (NI - National Instrument Forum Question...) It is hard to live with the Totally Random USB COM port Enumeration that Windows always apply...Is there...
0 Likes
marksccsinfocom
in How to generate and view a WinUSB debug trace log on Mar 07 2022 12:24 PM
Both download links are bad.  Are there updated links? 
0 Likes
maowa_2005
in Supporting D3Cold for USB Devices on May 16 2021 06:46 PM
hi for below point: In Windows 8, only the USB 3.0 driver stack restores configuration but not the USB 2.0 driver stack. Therefore in Windows 8 D3cold is not supported by the USB 2.0 driver stack I just want to know for Windows 10, the D3cold is still not supported by USB2.0 dirver stack?
0 Likes