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Microsoft USB Blog
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15.8K

Introducing the USB4™ Switch

Philip Froese on Sep 17 2019 11:49 AM
24.7K

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...
17.8K

Debugging UCSI firmware failures

Rajib Dutta on Nov 06 2018 06:24 PM
10.9K

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
4,661

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...
17.2K

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 ...
4,446

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...
6,447

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...
4,830

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...
5,666

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/...
5,830

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...
7,067

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...
18.4K

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...
8,486

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 ...
4,019

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...
7,006

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...
9,087

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...
9,183

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...
11.9K

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...
5,751

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...
5,323

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 ...
5,962

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...
9,440

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...
27.1K

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 ...
8,080

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...
6,093

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.
9,981

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...
4,364

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 ...
5,029

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...
8,780

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

Paul_H2010
in Using WinUSB for USB 3.0 (SuperSpeed) Devices on Windows 8 on Sep 27 2023 10:57 AM
Hi @Shyamal Varma, I see WinUSB can communicate with a SuperSpeed device. Does it communicate at SuperSpeed speeds or does it communicate at HighSpeed speeds? Thanks, Paul
0 Likes
sguilliams
in How does USB stack enumerate a device? on Aug 14 2023 02:59 PM
For Ronn, I think you want to set the registry keys to ignorehwsernum. It has the effect of assigning static COM ports for devices with the same PIDs/VIDs.https://learn.microsoft.com/en-us/windows-hardware/drivers/usbcon/usb-device-specific-registry-settings
0 Likes
moonvt
in Running USB Type-C System HLK tests with the Type-C MUTT on Jul 11 2023 02:00 AM
Hi,I have question about kind of usb using with Type C Super-MUTT device.As Microsoft document, it needs a kind of Super MUTT 3.0 USB:https://learn.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-usb-test-tool--mutt--deviceshttp://www.jjgtechnologies.com/supermutt.htmBut I can not find...
0 Likes
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