What is the power output of a USB port? - Super User
2013年12月18日 · Power that must be delivered by a USB port is defined in Section 7.2.1 of USB 2.0 Specifications. To start, the power delivery is defined in "units of load". For USB 2.0 one unit is 100 mA, and for USB 3.x one unit is 150 mA. USB standard defines two classes of USB ports, "high-power ports", and "low-power ports" The specs says, page 171:
How to find out which USB port is USB 3.0? - Super User
The use of blue pantone thermoplastics in USB 3.0 connectors is recommended on systems with a mix of USB 2.0 and USB 3.0 ports. For certification, the USB-IF does require that the user be able to clearly and easily distinguish between a USB 3.0 and a USB 2.0 port on a system; however, it is left to the system implementer on how to accomplish this.
Change default action on connecting a USB device - Super User
I've a device I connect to my windows computer (in this case it is an iPod but I don't believe that matters). Often when I first connect such devices a dialog will pop up giving a list of actions with a check box saying something like "do this as the default" or "always do this".
How to detect if a USB port is 3.0 or 2.0? - Super User
To check whether the USB device itself is USB 2.0 or 3.0, use USB Device Tree Viewer (on a computer). Then disconnect all your USB devices on the computer, and reconnect the USB in question. You'll see it appear on the sidebar on the left. Click it. …
How to disable USB connect notification sound? - Super User
2023年3月20日 · If you want to just disable USB sounds, either: right click on the volume icon in tray and select Sounds or: go to Settings-> Personalization-> Themes-> Sounds-> Sounds; Then in Program Events disable: Device Connect; Device Disconnect; sounds by selecting {None} for them in the dropdown.
Verifying USB connection speed (USB 3 or USB 2?)
2014年7月14日 · Some additional info: The little 'H' and 'S' in the great tool 'USB Device Tree Viewer' are only visible, if you run Windows 8.x (Text from Uwe Siebers site: "Windows 8 has native support for USB 3.0 SuperSpeed and an enhanced USB stack which delivers more information, e.g. which speed each port supports.
Can I repair a physically broken USB drive? - Super User
The device board is the same width as the USB connector. It may be possible to remove the broken USB connector and insert the device board stub into a USB patch cord female end. Use a piece of cardboard inserted with the board to take up …
How to identify USB Ports in Device Manager? - Super User
2018年7月24日 · On PCs, USB 'buses' are referred to as hubs. Identify your USB devices in Sound, Video and Game Controllers (or alternatively directly on the USB hubs) You can have a look at Device Manager-right click the usb device and find the port location.
usb - How to charge phone with laptop lid closed? - Super User
2015年12月11日 · For the Inspiron 11 3147 computer, shut down the computer. Then turn on the computer and keep pressing F2 until the BIOS screen appears. Then go to the Advance tab. Find USB wake support and enable it. Save the BIOS setting and exit. Start up windows.
How to physically clean a USB connector safely - Super User
2012年2月18日 · Flatten the cotton head using the plier enough to be able to fit tightly into the USB slot. Don't flatten too much - you want some resistance to guarantee a nice friction. Dip the cotton into alcohol, insert and give it a good rub - until the the metal contacts start to shine again.