Questions tagged [usb]

Universal Serial Bus; an interface standard for connecting computers and electronic devices for communication and charging.

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How can I hardreset a modem or the port under Linux?

I have a device (a modem) connected to a USB port (/dev/ttyACM0, Ubuntu 12.04) to dial a phone number, which only works if I perform the ultimate reset (taking device out of USB port, waiting some ...
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USB 3 stick in USB 2 port

If I plug a USB 3 stick (with 20/60MBps write/read speed) into a USB 2 port is it possible to get this speed (because USB 2 should be able to get 480Mbps = 60MBps)? I would assume that this speed ...
bruno's user avatar
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Convert USB Port to LPT1

I have a GIF12 Card reader & software that connects to a computer via LPT1 port. I want to connect the card reader via a USB port. I need the computer to see the USB port as LPT1.
Neil Porter's user avatar
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can't eject one USB drive at at time: can only eject GROUPS of drives (Windows 7)

I can't eject one USB drive at at time; I can only eject GROUPS of drives. Using the eject USB drives icon in the system tray, the drives are grouped (in ways that I don't understand; maybe by USB ...
philiptdotcom's user avatar
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Ethernet to USB adapter (with power supply)

My internet setup is as follows: Internet > wireless > 4G router > wireless > Main Router > PC (wired) and other devices (wireless) As you can see the Main Router (which I connect all of my devices ...
zombar's user avatar
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Seagate 3TB drive not showing up in Device Manager in Windows

Context My aunt gave me a 3TB Seagate external USB drive for Christmas. It takes a little jiggling (power cycle) to work on my Mac, where it shows up as a perfectly functional NTFS partition, but in ...
mcandre's user avatar
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Short USB cables not charging?

I find this a strange problem but I can't find anything online about it. Recently I purchased a few short USB cables (20-30cm), to use in my car's USB connector to charge my phone. Strangely an ...
tropolite's user avatar
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How can I boot from USB with an Asus M2400N laptop?

I own this wonderful Asus M2400N laptop from 2003, which is still performing great, and I'm desperately trying to boot from a USB key drive (or SD Card via an PCMCIA card reader). Hardware info here. ...
derFunk's user avatar
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Strange USB cable behaviour, is something wrong with my computer?

Today I bought a micro USB cable for my Nokia Asha 311. It worked fine for some hours, but now the mobile shows as plugged in but it isn't. Now I can see this in my computer's settings: Can someone ...
Anirudha Gupta's user avatar
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PC won't boot / USB and PS2 keyboards don't work

My brother's PC has stopped working. He now cannot boot into windows, and he can't access BIOS by pressing the DEL key as no keyboards work. He has tried 4 different keyboards, one of which is PS/2. ...
Truncheon's user avatar
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connecting device VGA output to HDMI or USB input on TV

I have been running a CCTV monitoring station through my main TV for several years using VGA to VGA which worked well. Got a mega bargain on LCD/LED large screen TV which replaced it but found it didn'...
bobbycow36's user avatar
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Use USB pen drive as HDD for Linux mint

I have already installed Linux mint to a USB pen drive.It is working,but slow. On a p4 2.8 Machine with 512 ram. Can i speed up this system? Any suggestions ? Thank you.
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Slow Bios Check After plugging USB Device

i am having a problem with booting my PC...After plugging my wireless network adapter in a usb port(does not matter which), it takes 30 secs to pass the bios check and start windows loading. If I ...
mbD3H's user avatar
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How can I extend my usb keyboard/mouse by 15m or troubleshoot my existing attempt?

USB max length is apparently 5m. At the moment, I have a 5m usb cable, and on the end of it my keyboard. My keyboard has an internal 1 port usb hub, which I have plugged my mouse into. This setup ...
NibblyPig's user avatar
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Could it be my motherboard that is dropping my external HDD connection?

I use an external HDD on a machine. Lately, the hdd has been dropping the USB connection (Windows plays the disconnect/reconnect sounds, then the hdd device goes away for half a second, and comes ...
bobobobo's user avatar
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Recognizing a USB keyboard and mouse within Windows after a clean install

I am attempting to deploy a bare bones Windows XP Pro SP3 clean install image across multiple computers. It has been a success. However, for computers without PS/2 capabilities, I am unable to ...
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External Hard Drive wont search

I plug my USB 2.0, 1TB, into my computer usb port. When i open the expansion drive and try to search it won't pull up any of my files. It used to, though now it won't. I tried on another computer, and ...
nextlevelgamingCO's user avatar
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USB Device works on one computer and not another

I have an ip camera with a motor mounted to it that is used to zoom the lens. This motor is controlled by software that came with the motor. A USB cable is used to link the computer to the motor. ...
grinch's user avatar
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Activate USB Speakers in KDE after login

I have some USB speakers that I use with KDE under linux. If they are plugged in when KDE starts, all works fine. If I plug them in while KDE is already started, they are recognised by the system, ...
Paul's user avatar
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Data Integrity with Desktop External HDD connected to daisy chained Dell Monitor USB hub

I have two Dell U2412M monitors, both of which have USB hubs built into them. I have one of those hubs connected to my MacBook Pro directly, and that hub has a webcam plugged into it. I want to ...
raffi's user avatar
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Win 7 Laptop Driver for USB A plug to act like a charger

Is there a USB Windows 7 driver that outputs a voltage between Pin 1 and 4 of 5 V? Just like a Charger. Others pins should be open/disconnected. My notebook is a Lenovo X220.
jacktrades's user avatar
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How do I login to my iMac without keyboard and mouse?

I have turned off the bluetooth in my iMac and disabled the USB ports too. Now i am unable to login to my iMac because the keyboard and mouse are not detected. Bluetooth is switched off. USB is ...
Dray's user avatar
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Make a live USB of your installed ubuntu

I wonder that whether there is a way of making my own installed ubuntu a live USB. The reason in fact is that I want to make my ubuntu to be used by anybody. After this guy used my ubuntu I do not ...
Eray Tuncer's user avatar
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4 to 1 VGA Switch with USB controller

Not a hardware guy, so some of these terms might not be right.. A work project is looking to replace a commercial product with an internal solution for cheaper. The commercial product is just a table ...
Mannimarco's user avatar
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inconsistent USB connection between mobile and computer - lack of power or faulty hub?

I am using a four port cheap USB hub, plugged into a GoFlex Home on one side, with a Micromax Q5 mobile on the other. The only other device plugged into the hub is a flash drive, which functions ...
ShankarG's user avatar
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How to put an individual USB port to sleep?

I have a few external drives that I don't always use and want to be able to have them shutdown when I am not using them. They shutdown when the computer goes into sleep mode but I would like to be ...
Gaiko's user avatar
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Your USB can perform faster?

I get this message "Your USB Composite Device can perform faster...". I am sure that both the device and the USB is USB 2.0 (by testing using another USB 2.0 device into the very same port,...), why ...
longbkit's user avatar
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LPT port using USB

I have a machine which connects to PC with LPT port. And in the program I am selecting port number on which is LPT port connected, something like etc. ( a326 ). Now I have bought LPT to USB converter....
user123_456's user avatar
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Data transfer is extremely slow after partitioning external USB drive

I bought an external USB 3.0 drive with 500 GB capacity. OS is Windows 7. I use it with a USB 2.0 slot, no problem there. Initially I used it without making several partitions and it was very fast. ...
artgrohe's user avatar
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Get caller id and append to url in browser automatically

I am trying to find a caller id device/program that will automatically open a browser and append the incoming phone number to a url when receiving a call. For example: https://www.myphonesearchapp.com/...
timbad2021's user avatar
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Dell XPS randomly freezes – Mouse, keyboard and USB ports lose power until reboot

I have a Dell XPS 4435MT desktop. It randomly freezes – and it happens shortly after startup, mostly less than 10 minutes. When it freezes, mouse and keyboard have no power anymore. The USB ports on ...
sandy's user avatar
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Uninstalling device from USB port or refreshing USB drivers

Currently when I plug my Android in via USB port 1, it registers as my tethered 4G internet access, and when I plug it via USB port 2, it registers as a debugging android development device that I can ...
SwimBikeRun's user avatar
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Toggle-able USB hub with more than one input and output?

I recently came across this product: http://ppa-usa.com/shared-network-hub-4-port-usb.html The only problem is, this is nearly opposite of what I need. Ideally, I'm looking for a USB hub-like device ...
cemulate's user avatar
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Protocol for Ethernet over USB?

I use USB to connect to modem on my computer. As mentioned here. There are about four main protocols which a USB cable to provide ethernet-style networking. I'm curious to know which one do I use? How ...
Sryia's user avatar
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How to connect USB Modem over command line

On Fedora 15, how does one connect a USB Modem (I have a ZTE MF636) over command line? If I do ps auwx|grep ppp then I can see this command: /usr/sbin/pppd nodetach lock nodefaultroute ttyUSB2 ...
hamstar's user avatar
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How can I get a device with parallel interface to work on my laptop?

I have performed a product search for USB-to-parallel and ExpressCard-to-parallel adapters but when I read the reviews everyone complains that only work with printers. Where can I get an adapter ...
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Why are so many wireless mice using USB dongles these days? [closed]

I've been noticing that increasingly mice seem to be coming as wireless mice with USB RF dongles. Why are manufacturers emphasizing proprietary dongles instead of USB wired or Bluetooth?
CyberSkull's user avatar
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Is USB Data + wire supposed to have grounding?

Whenever I am connecting a LED to USB's red cable (5V) and Data + (white cable), the led turns ON, although the light isn't that bright as if i would connect it to GND (black cable) instead of Data +. ...
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USB topography viewing tool for Windows

Is there a tool that displays the topography of USB devices on Windows?
Ashwin Nanjappa's user avatar
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How can I reduce high CPU usage from DPC's with USB Serial Ports

I have an app that communicates with up to 50 devices over serial ports. The communication takes place in threads, and the threads are throttled so that only a certain number are active at once. ...
rossmcm's user avatar
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How to fix file folder permission in Windows XP or Windows Vista?

I have this problem that my file and folder can't be accessed because of file/folder permission. And every time I use my usb drive with another computer I need to apply folder permission for each ...
cyberquarks's user avatar
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1 answer
601 views

hooking up a belkin USB switch

I'm trying to help my parents hook up a Belkin 4-Port USB switch (model F1U200V) to a couple of USB printers, however, Google hasn't been able to find a manual. a picture can befound at http://www....
Levi Campbell's user avatar
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GA-P31-S3G motherboard usb flash drive boot

I currently trying to understand if my motherboard supports booting from USB flash drive or not... In motherboard manual it written: "First/Second/Third Boot DeviceSpecifies the boot order from the ...
enflam3's user avatar
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3 answers
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Windows 7 Professional 32 bit USB hub/port power settings

I have recently bought Lenovo Enhanced keyboard for my x200s and Ultrabay setup. The main reason was to get two additional USB ports. The problem I have is that there's not enough power for anything ...
Taavi's user avatar
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How do I scan a USB 3G modem for malware without reinfecting the PC?

My mother's Windows XP system recently got infected with the SHeur trojan (SHeur4.ese). I was able to download and install Malwarebytes Anti-Malware in line with the advice here, but the modem was ...
francois's user avatar
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How can I replace some old serial numeric keypads?

My Problem: I have some older serial numeric keypads that are getting hard to replace. I tried a USB keypad but the distance of the cord wasn't long enough, so I tried using a USB to ethernet and ...
Sam's user avatar
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1 answer
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Moving Windows 7 between PCs: wireless keyboard/mouse [closed]

I just moved to another country and bought a new PC here. When I plugged in my old HDD, Windows 7 booted, but I can not use new (wireless) mouse or keyboard on login screen. Keyboard works fine in ...
Andrey Shchekin's user avatar
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USB Mouse Unstable and Flickering

I have this Microsoft USB mouse which is unstable with pointer and is flickering a lot. For example, when I open Firefox or other browser or any other text editor, the vertical scrollbar on the right ...
Mahesh's user avatar
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Booting Linux live CD from USB?

I'm using the Ultimate Boot CD, and I've added a bunch of customized .iso's to it. I can boot into those .iso files fine, but most of them are mini-versions of Linux that are designed to run off of a ...
Mako's user avatar
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1 answer
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External USB Hard drive detected but not assigned a drive letter

I have a USB HD connected using SATA to USB connection to the a PC with XP, before it used to be recognised fine and assigned a drive letter but since some malware issues with my PC, I had to repair ...
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