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Microsoft USB Blog
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7,458

Introducing the USB4™ Switch

Philip Froese on Sep 17 2019 11:49 AM
16.3K

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...
10.5K

Debugging UCSI firmware failures

Rajib Dutta on Nov 06 2018 06:24 PM
6,106

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
1,701

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...
9,018

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 ...
1,251

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...
2,596

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...
1,590

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...
1,945

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/...
1,936

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...
1,975

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...
11K

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...
3,417

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 ...
1,001

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...
2,628

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...
5,541

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...
4,591

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...
5,393

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...
1,836

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...
2,063

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 ...
2,328

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...
4,585

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...
13.3K

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 ...
4,020

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...
2,313

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.
4,912

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...
1,349

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 ...
1,525

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...
3,699

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

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
BHarris57
in Capturing USB Debug Traces on Apr 28 2021 12:39 PM
This CMD file makes the article seem dated. Is there an update somewhere?
0 Likes
Chris007
in How to determine whether a USB 3.0 device is operating at SuperSpeed? on Mar 16 2021 02:41 AM
Valuable and helpful information - Thank you putting it together!
0 Likes
ZX_Jin
in How to install WinUSB.sys without a custom INF? on Aug 14 2020 11:31 PM
hello Shyamal Varma, Eliyas Yakub [MSFT] and Qiang Qiu [MSFT]; The link you provided: Writing an .Inf File for WinUSB Installation in this article seems lead us to a website that introduce different hardware MS can support but didn't tell how to solve write .inf File for WinUSB Installation directly...
0 Likes
fauthd
in What is new with Serial in Windows 10 on Jul 15 2020 08:15 AM
Hi, barcode scanners from Honeywell do support CDC-ACM and usbser.sys.To use usbser.sys ensure you do not install the driver from the Honeywell website. This is a custom driver.In DevMan you can see which driver is used. Usbser.sys uses names like "Usb Serial Device (COM3)", while the Honeywell driv...
0 Likes