USB 2.0 (Hi-Speed) is a USB specification that can transmit data at up to 480 Mbit/s.

learn more… | top users | synonyms

0
votes
2answers
31 views

USB 3.0 compatibility with USB 2.0 devices

Is a pure USB 3.0 port fully compatible with USB 2.0 ? My question came when I want to buy a new motherboard. Some motherboards have USB specified as USB 3.0/USB 2.0 which clearly signifies that this ...
0
votes
0answers
16 views

How to control Port Indicator on USB Hub

some background-story: Some days ago i had to copy a pdf file to multiple usb sticks for customers. in this process i wished i could write a script that blinks the port led of a port where the copying ...
0
votes
0answers
16 views

USB to Serial cable fails to establish communication on Ubuntu

I have a serial device which works fine when connected directly to the serial port of the linux box but fails when I connect it using a serial-to-usb cable - that is using the USB port on the linux ...
1
vote
0answers
15 views

why does my USB show as an unknown file system with 0bytes used and 0 bytes free [duplicate]

This is my first time posting a public comment and my first time with a usb problem i can't solve. When i plugged my USB into my PC it takes a while to be recognized, and then when it is, it appears ...
2
votes
0answers
32 views

Maximizing speed of USB 2.0 clients on USB 3.0 hub

I need to connect 2 USB 2.0 cameras and one USB 3.0 SSD to a single USB 3.0 hub. I would like both of the cameras to run at 480 Mbps and the SSD to use the rest of the bandwidth. Is this possible? I ...
1
vote
1answer
112 views

Why does Device Manager show “Intel(R) USB 3.0 eXtensible Host Controller - 0100 (Microsoft)” when I have only USB 2.0 ports?

My laptop's model number is an ASUS X205TA-SATM0404G. It has 2 USB 2.0 ports, which I have verified by looking up the specs online and also via the software and techniques mentioned here: How to ...
0
votes
0answers
44 views

Manually force a USB port to use USB 3.0 specification

I have a USB 3.0 external HDD which I need to connect to my laptop having USB 3.0 ports. But the problem is that out of 10 times it will detect only 1 time as USB 3.0 which is very annoying. I am ...
0
votes
0answers
66 views

Kinect USB 2.0 cable not working with USB 3.0 port (MBP 2015)

Scenario: Kinect Adapter w Kinect attached 2015 MBP w USB 3.0 All cables and devices work on the following: Raspberry Pi 2B HP Laptop 2015 MBP when connected to USB 2 hub I have one knock-off ...
0
votes
0answers
23 views

Smart card reader fails to initialize propery at system boot

I'm expiriencing problems with a Smart Card reader that is plugged in to a USB 2 port. The problem is that it often does not properly initialize on system boot if I have a Smart Card inserted in it ...
1
vote
0answers
115 views

How to determine USB OTG mode on Linux

I have got an i.MX6 device, which has a USB OTG port. Is there a way in Linux to find out whether that USB OTG port is currently in host mode or in peripheral mode? I tried dmesg | grep -i otg and ...
6
votes
3answers
277 views

USB 3 hub can also host USB 2 devices

I understand that when I use a USB 2.0 devices on USB 3.0 ports, that I'm really just using a USB 2.0 bus along side the USB 3.0 bus. What I really need is a true USB 3.0 device that can act as a USB ...
0
votes
1answer
55 views

Is it possible to retrieve data off of a (possibly) damaged flash drive? [duplicate]

I plugged in my USB flash drive into a port that sticks out of the front of the computer and put my files onto it. I didn't immediately take it out, but instead left it in there while I continued ...
-1
votes
1answer
47 views

Do USB power supplies send signals indicating energy level being delivered?

Do USB power supplies send signals to tell the connected device (tablet/phone/camera) how much power is being supplied? Or, is measuring it the only way for the device to know how much energy is ...
0
votes
1answer
75 views

Odd, “ghost failure” random USB mouse disconnects

Like a month ago while playing Counter-Strike: Global Offensive my mouse just randomly disconnected and reconnected a few times, for a few moments, then disconnected. I was using exactly the same PC ...
1
vote
1answer
441 views

Force MacBook Pro USB 3.0 to work as USB 2.0

I have installed Windows 8.1 through bootcamp. I have to plug in a device that implements the USB 2.0 interface, however, my MBP does not have any USB 2.0 ports, only 3.0. I know that theoretically ...
0
votes
1answer
31 views

I have a 10 USB HUB that turns off when I turn on a device from the wall socket

if I turn on a device from the wall socket the HUB turns off and then back on again,is that normal..? It did come with a power adapter but that got damage so its not powered,only powered by the PC.
0
votes
0answers
14 views

Benchmarking my USB ports (receptacles)

This might sound like an odd question, but I've wondered if there's any way to benchmark – or provide some sort of electrical assessment – regarding my PC's USB 2.0 ports. I've found this link from ...
1
vote
2answers
87 views

USB hub damages connected devices

This may be similar to USB hub damages an external hard disk (and storage devices) on use attempt. My question is at the end of this description. I purchased a cheap PORTS brand USB 2.0 hub to use ...
0
votes
0answers
114 views

Pendrive recognized as USB 1.1 device

I have just pluged-in my old USB pendrive to simple nettop with Windows 7 on board. I used every of three USB ports and in each of them I saw standard Windows notice, that this device can work much ...
1
vote
1answer
67 views

Split Mini USB No MINI port on Computer

I am attempting to connect my new c.crane my Super USB WIFI 3 antenna to boost my signal so my neighbor can connect to our router.. It came with a USB splitter one side of which is a MINI USB.. ...
0
votes
1answer
77 views

How to achieve highest performance with multiple USB 3 drives but only one USB 3 port

If a computer has one USB 3 port, and one USB 2 port, and the user needs to connect two external USB 3 drives (backwards compatible to USB 2), will highest speeds be obtained if the user connects them ...
2
votes
0answers
427 views

How to limit the USB bandwidth a device can allocate on Linux

How do you put an cap on the amount of bandwidth a USB device can allocate on Linux? I have a couple of cheap USB webcams that I'm trying to running simeltaneously. Running v4l2-ctl --list-formats-...
0
votes
1answer
83 views

Connection a Usb 2.0 driver to a usb 2.0 port using a 3.0 extension cable

I have a usb 2.0 Audio driver for my headphone and a usb 2.0 mouse, and i have 2 usb 2.0 ports and 2 usb 3.0 ports., I wanted to buy a usb extension for both of them because i need the extra length, I ...
1
vote
1answer
70 views

Occasional failure of USB device

Laptop is a ThinkPad T520, desktop is a ThinkCentre M series. Both use C200 Series Chipset Family USB Enhanced Host Controller. The failing device uses a Silicon Labs C8051F342 chip. I am testing a ...
14
votes
1answer
1k views

Why is there a speed increase when using a USB 2.0 device with a USB 3.0 port?

I know this question, or similar questions, have been asked before, but still I am curious… My laptop has two USB 3.0 ports and—on occasion—I will plug in a Western Digital external hard drive which ...
0
votes
2answers
4k views

How to ensure an external DVD drive will receive sufficient power from a USB port - before purchase [closed]

There are various external USB drives, some require external power supplies, some have optional external power supplies, some have 2 USB plugs, 1 for power and 1 for power + data. If I have a device ...
0
votes
1answer
239 views

Windows 8.1 sometimes does not recognize USB 2.0 connection on the front port

Windows 8.1 sometimes does not recognize the front USB 2.0 port on my machine. Any device that is connected to the front port are not even turning it’s light on. My mouse and keyboard work well and ...
0
votes
2answers
1k views

USB 3.0 hard drive in usb 3 port only recognized as usb 2 and detected only when connected to usb2

I have a WD MY Passport ultra 4TB usb 3.0 external hard drive. It does not function when I connect it to an usb 3.0 port, only usb 2.0 recognises the device. How do I resolve this issue?
0
votes
1answer
1k views

connect a usb only printer to router without usb port via usb to ethernet adapter

I have cisco linksys router which does not have a usb port and a usb to ethernet adapter. When I am trying to connect the printer to the router using the adapter the router does not shows the device ...
1
vote
0answers
131 views

Are some USB hard drive enclosures unsuitable for system drive use?

I have a number of hard drives in USB 2.0 enclosures. Some of these produce odd but consistent software failures when trying to use them as a Linux system drive. The problem appears to be tied to the ...
2
votes
0answers
184 views

USB hub advertised as 2.0 actually works as 1.1

I bought this USB hub http://www.ebay.com/itm/281298880612 which is supposed to be a USB 2.0 hub. When I plug a pendrive in to the hub, Windows gives the message "This device can perform faster if you ...
3
votes
1answer
84 views

How am I exceeding USB 2.0 speeds on a USB 2.0 port?

I am writing files to a USB 2.0 drive from a RAM disk, that has a 256MB random filled file on it (created from /dev/urandom to stop the file being compressed too much). When I look at the speeds of ...
0
votes
1answer
222 views

Will a 10 slot USB3 hub provide full bandwidth for 10 USB2 flash drives, and if not, where is the bottleneck?

I am wondering if a USB3 hub connected to a USB3 motherboard could sustain 10 USB2 flash drives being used simultaneously to transfer data at full bandwidth. Theoretically USB 2 speed is 60 MB/sec ...
0
votes
0answers
12 views

Dont know how to connect AC-97, HDAUDIO, and USB connectors to motherboard [duplicate]

I'll provide pictures so you guys can see, but basically I recently bought a new case for my pre built lenovo k330b. I cant find how I'm supposed to position the connectors. Please help me out with ...
4
votes
4answers
22k views

Force a single USB 3.0 port to work as USB 2.0

I have several Dell XPS 13 machines that exhibit intermittent failures of the left USB 3.0 port, as described in this thread. I have lost data to silent corruption/disconnections on several external ...
0
votes
3answers
17k views

Windows 8: How to change from USB 3.0 to USB 2.0

Is there a way to disable USB 3.0 and enable legacy USB 2.0 support on Windows 8? I have an old microphone (Blue Snowflake) that only works when plugged into a USB 2.0 port. Is there any way to ...
0
votes
0answers
220 views

What's the advantages of usb 3.0 compliant thumbdrive that doesn't have USB 3.0 speed performance?

I just learned that there are USB 3.0 compliant thumbdrives in the market that only support up to the maximum speed of USB 2.0 (nothing to do with using USB 3.0 device on USB 2.0 port here) and they ...
1
vote
2answers
69 views

What stats should I look out for when buying a fast USB drive? [closed]

What facts and figures should I look for speediest copying of single large ISO or multimedia files (700Mb to 4.5Gb)? Also, if a flash drive is the fastest USB-3 compatible device, can I assume it ...
1
vote
0answers
597 views

Can I Power the front-panel USB 2.0 ports with the power supply's 5V rail?

I have a high power (700ma+) USB device I wish to use on a single front-panel USB port. The USB specification in Wikipedia states: The USB 1.x and 2.0 specifications provide a 5 V supply on a single ...
2
votes
0answers
492 views

USB2 device incompatibility with USB3 computer

I have a new laptop with 2 USB2 ports and 2 USB3 ports. I have to use an USB2 RGB-D camera, namely the Softkinetic DS325. On my old laptop (only USB2 ports) everything is running as it should. On the ...
0
votes
1answer
1k views

Is it possible to use USB 3.0 Pendrive into my Laptop's USB 2.0 Port? [duplicate]

Currently I am having USB 2.0 port Laptop. I am in the plan to buy USB 3.0 Pendrive/External Hard Disk. Whether USB 3.0 pendrive/ext HDD will support USB 2.0 Laptop's port? Or it will have problem to ...
0
votes
2answers
143 views

Data speed on usb 1.0 vs 2.0

I have a CDMA USB dongle that I use for connecting to the internet. Now I plan to upgrade to a 3G dongle which has a USB 2.0 connection. Right now I have only USB 1.0 port on my computer. Will the ...
1
vote
2answers
394 views

windows 8 performance which is installed on USB SSD (boots from USB 2)

is any one here tried installing windows 8 to external USB SSD drive and booting drive from usb 2.0 port. i also want to install visual studio 2012 kind of ides and programming related softwares in ...
2
votes
2answers
1k views

Is there any advantage to using a USB 3 hub with USB 2 storage devices?

I have a host of USB 2.0 external HDDs that I'd like to plug into a single hub. Usually I don't actually access more than one at once, but you never know. Basically, I'm not sure how USB hubs work ...
8
votes
5answers
7k views

Would USB 3 make a difference for a USB 2 5400 RPM drive?

I've got a USB 2 5400 RPM external HD. I'm thinking of getting a new computer with USB 3 ports. If I'm currently getting read/write speeds from the external HD on USB 2 of roughly 30 mb/s (both read ...
1
vote
0answers
405 views

USB Wireless headset - Works in VMWare, not in host machine

Environment: Host - Win7 Pro SP1 64-bit VMWare Workstation 9.0.2 Guest - Win7 Pro SP1 64-bit I have two devices on USB 2.0 ports: a wireless headset from Logitech (H800) and a scanner ...
2
votes
2answers
718 views

USB 2.0 device in USB 3.0 Port

If I plug in an USB 2.0 device (e.g. mouse, keyboard) into a USB 3.0 port, will the controller still use polling to acquire input data (e.g. keypresses/movements) from the device?
0
votes
1answer
493 views

PNY 64GB Thumbdrive doesn't work in HP Envy h8-1414

I bought a 32 GB thumb drive (similar to the one below) and copied my wiki on to it using my Windows 8 laptop. I then plugged it into my HP Envy h8-1414 which has Windows 7 shoe horned onto it. ...
1
vote
0answers
275 views

USB 2.0 ports stop working, USB 3.0 port OK

I have a Windows 8 laptop (Acer V3-551-8489) that features 1 USB 3.0 port and 2 USB 2.0 ports. For some reason, the USB 2.0 ports stop working from time to time. Is there a way to restart those ...
2
votes
0answers
250 views

Installing USB Mouse on NF61S Micro AM2 SE?

I am using Windows XP sp3 and Windows 7 on NF61S Micro AM2 SE motherboard with AMD Athlon 64 X2 Dual Core 4400+, 2.31Ghz, 1.93RAM link for motherboard site; http://www.biostar.com.tw/app/en/mb/...