Universal Serial Bus (USB) establishes a connection between devices and a host computer.

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unitek nec upd720200 not detected

I've decided to buy an USB3.0 controller on PCI for my debian machine. I did a short research and it appeared that NEC chips will be fine. I've bought Unitek NEC UPD720200 and I does not work: I ...
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change rights in usb key? [closed]

I have this USB key. When I'm using it in my computer I can't do anything on it, i.e. I can't delete or add files/folders to it. I tried to change rights by chmod -r 777 but it doesn't work! Can you ...
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26 views

Configure a usb wireless adapter when hotplugged

I have a pc connected to the internet on eth0 and I have a usb wifi dongle: I succeeded to configure it as a hotspot to which I can connect from my mobile devices so that I can share the pc internet ...
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1answer
31 views

How to check if USB WiFi-Adapter is not working or router is out of range? [SOLVED]

I'm trying to use the TL-WN725N as an USB WiFi-Adapter with Fedora 20. As it is Version 2, it does not work out of the box. I installed the driver (first time I compiled myself, second time I used a ...
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1answer
68 views

mounting removable USB disks with nodev,noexec,nosuid

When I want to use a USB disk on my desktop, I insert the disk and mount it manually, for example: mount /dev/sdb1 /mnt/usb I know that I can specify mount options with -o, such as mount -o ...
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1answer
47 views

Tell Linux to use latest libusbx I have downloaded

Background, I'm trying to play with a Kinect camera and Python. When I tried to make freenect (manual install) on Ubuntu 12.04, it complained about undefined libusb_get_parent. However, it works ...
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1answer
23 views

USB 3G dongle internet keeps failing on Fedora 20 laptop

I use a 3G dongle for internet in my summerhouse, it has worked fine all summer, but since yesterday it has been losing connection, or something and I have to unplug it and insert it again for the ...
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26 views

Disable USB drive from sleeping

I am loading fedora20 directly from a SATA drive connected via USB. The problem is that I will be working and all of a sudden the drive seems to have been put to sleep and nothing will work except ...
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2answers
174 views

How does an emulated keyboard work?

I have read that some USB devices emulate a keyboard and the information these devices send will be as if the information was typed on a keyboard. For example: a magnetic card reader can use an ...
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98 views

USB Ports not working with Ubuntu Linux 14

Sorry if this seems like a duplicate post but I am Ubuntu Linux noob and am struggling with it a bit. I installed and configured Ubuntu Linux 14 for dual boot setup on my Windows 8.1 machine. ...
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How to identify process accesing usb port (scale)?

I'd like to identify through terminal which processes are using the scale connected to my mac, I need to kill those processes or clean the port to be used only by my app. Thanks a lot in advance.
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So, apparently i toasted this USB Thumbdrive, but is there still hope?

I'm having trouble with a USB thumbdrive which isn't recognizable under OSX Disk Utility. Device is not popping up, nor any partitions. Needless to say this is occuring on all USB ports and even on a ...
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72 views

unable to format usb drive

I'm trying to read an usb drive that until a few day ago seemed to be perfectly working. Today windows started to be unable to access or modify its content. Trying to reformat it with linux (arch ...
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1answer
71 views

Mounted a USB to /home and lost all the sub-directory's

I have been searching for a about a hour but I can't find a answer if someone knows another thread that will help I would gladly look through it. So what happened is I am learning about how to mount ...
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1answer
209 views

ELAN Touchscreen on Ubuntu 14.04 and Debian 7.6

I recently purchased an ASUS Q550LF laptop with Windows 8.1 preinstalled, and subsequently installed Ubuntu 14.04 and Debian 7.6. I use Ubuntu for most tasks, but occasionally have reason to boot ...
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15 views

Getting output from vivopay-serial converter

First off, I am new to linux so please excuse my ignorance. I'm trying to read output from idtech's ViVOpay Vend III in linux. The device claims it interfaces with USB and RS-232. I currently have ...
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1answer
654 views

Ubuntu 14.04 LTS - USB 3.0 Low Output or not working

I have a problem with my laptop. Since I've installed Ubuntu 14.04 LTS in dual boot, my two USB 3.0 don't work anymore. Maybe you need to know: My Laptop has 2*USB 2.0 and 2*USB 3.0. One of the USB ...
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59 views

Wireless 3g dongle not mode-switching successfully

Lots of wireless 3G dongles have 2 modes they can operate in; storage mode where they mount like a USB thumb drive and which usually contains Windows drivers for the device, and communication mode. ...
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1answer
35 views

Pernicious USB-stick stall problem. Reverting workaround fix?

There's an issue with Ubuntu that hasn't been fixed yet, where the PC freezes or gets really slow whenever it is copying to an USB stick (see Why is my PC freezing while I'm copying a file to a ...
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1answer
32 views

Control USB connection/power - only charge

When I charge my GoPro with a wall-charger I'm able to still use it and take photos, but when I connect it to my Linux computer I can't. I want to be able to programmatically control how my computer ...
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1answer
29 views

Measuring transfer speed of USB drive

I want to write a program to find out the average data transfer speed of my USB port. How do I go about implementing it? The only method I can think of is writing a large file to the path where the ...
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1answer
48 views

How to give more power to a USB device (error -110)?

I’m trying to mount an external hard drive (2.5", USB, no separate power supply) on Debian 7, but it gives me (in dmesg as well as when trying to boot with the device connected) errors like: ...
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31 views

Not receiving any data from ACM device

I am unable to receive any data from a CDC-ACM device on my embedded Linux device. My Linux embedded device is running kernel 2.6.16.11 and has a armv5tejl processor. When plugged in, I see the ...
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1answer
34 views

How to use a USB device instead of a hard drive

Recently I setup a webcam that uses ftp, which uploads the current frame every 0.33 seconds. This creates thousands of images on my hard drives. I have a daily cron job deleting anything past 10 days ...
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1answer
157 views

How to detect a working ttyUSB for my usb modem

I working with OpenWRT and need setup USB 3G Modem. When i connect USB modem i see in logs that system create four ttyUSB. Why four? Tue Jul 29 07:45:23 2014 kern.info kernel: [ 580.220000] ...
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46 views

Format USB drive

I have a USB drive which I format with sudo mkfs.vfat -I /dev/sdb1 When I then look at the size of the USB drive with df -h, it reports its size to be 64 MB, though it should be 8 GB. What am I ...
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86 views

HSPA+ USB Modem Alcatel X600 1bbb:0195

The Modem Does anyone have this modem in Linux? I do not get to configure the device. I have tried other tutorials similar devices without success. I can't get the device /dev/ttyUSB0 My System: ...
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1answer
143 views

Bought Wireless Adapter, Can't Use It

I bought a cheap Aztech WL572USB Wireless-N USB Adapter. It clearly says it supports linux on the documentation but strangely doesn't even provide any way to set it up. I assumed it's plug-n-play but ...
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2answers
298 views

USB set to /dev/sda instead of /dev/sdb

I've been trying to use a kickstart file to guide the Red Hat installer (RHEL6.5) without user intervention. It correctly looks for the kickstart file in /dev/sdb/fs.cfg, but because the USB is ...
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2answers
2k views

How do I dual-boot Kali Linux With ISO (no CD/USB/DVD)

I am trying to install Kali Linux 1.0.7 to my Windows 8.1 32-bit PC. I have the ISO, but I have no CD's, USB Sticks, or DVD in my home so I was wondering how can I install Kali Linux without ...
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61 views

Emulating scroll lock behaviour to trigger USB KVM switch

At work, I use two computers: one Windows machine for intranet and mail, one Ubuntu machine on a separate network for development. In order to easily switch between the two I use a simple USB KVM ...
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How to turn off a USB drive when samba is not using it [Raspberry PI]

I have a backup server on a Raspberry Pi using samba with 2x 2TB drives for storage. To reduce noise and drive degradation I'd like to turn them off when I'm not transferring files. I tried to ...
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359 views

command to determine ports of a device (like /dev/ttyUSB0)

I have a question regarding the ports in Linux. If I connect my device via USB and want to check its port I cant do it using the command lsusb, which only specifies bus number and device number on ...
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21 views

Rfkill refuses to unblock the WiFi device

Running rfkill list indicates the USB WiFi adapter is softblocked. I can run rfkill unblock 0 with no error message, yet running rfkill list again indicates the device is still softblocked. ...
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1answer
37 views

How can I administer a server if USB disabled?

I'm looking to disable USB via the kernel for a high-performance server. How can I effectively administer the server, if problems occurs if USB isn't enabled? Without USB, keyboards and mice ...
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61 views

How do I know from a BeagleBone Black if it is connected via USB (as a client/slave)?

BeagleBone Black has an USB port which allows the user to access it through ssh. In general, we could say that when you plug it to a PC, the PC is the USB host and the BBB is the USB client. On the ...
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52 views

Reduce cache size of flash storage devices

For various benefits Linux uses a memory cache for writes to removable stogare devices like memory sticks. This cache seems to be quite large on my system, which leads to some annoying behavior. For ...
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1answer
46 views

Device URI for Printer

I have the system printer GUI installed on Centos 6.6. I added the printer (HP LaserJet Pro P1102). The model exists. The problem is that the GUI is asking for the Device URI which I'm not sure where ...
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58 views

Brother scanner and missing /dev/bus/usb entry?

I'm having awful trouble getting a DCP-7055 multi-function printer to work as a scanner with Mint 16. (My old flatbed scanner was working.) (I have printing working.) I've installed the Brother ...
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1answer
49 views

How to suspend an USB device?

I want to suspend a connected USB device at my pc manually. I tried the following instructions in Debian (Kernel 3.2.0). uname output: Linux debian7-dev-gnome 3.2.0-4-686-pae #1 SMP Debian ...
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72 views

How to use a PS gamepad with OpenWRT?

I'm fairly new to OpenWRT and Linux in general so please bare with me. I'm trying to print the button presses from a playstation gamepad to the console on an Arduino Yun which has OpenWRT. I've used ...
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59 views

How to activate reverse tethering on CentOS 5

Most examples for reverse tethering are for Ubuntu. They go something along these lines: Attach smartphone Configure usb0 Start reverse tethering on the smartphone Use the PC network via USB from ...
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462 views

minicom showing offline

I am trying to use minicom in Ubuntu. To do this I first connect my USB to DB9 converter, then I type this command on terminal dmesg | grep tty to check if my USB to DB9 converter is connected ...
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65 views

Input/output error using jmtpfs not saving file when copying to device

I'm trying to mount an Android device on Debian using: jmtpfs /media/mobile But when I try to copy a file from my system to the device I get an input/output error saying that the file can't be ...
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155 views

USB error -110 (power exceeded) but works when reconnecting

At the last boot, two USB devices were not powered: The Logitech G5 mouse works most of the time, but this time I had to plug it in (in the same motherboard USB port) three or four times before it ...
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93 views

USB HDD Enclosure works with Ubuntu, but not Raspbian

SOLVED: Even though the enclosure came with its own power supply, it required a powered USB hub, probably for some internal components that don't draw power from the main supply. I have this dual HDD ...
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25 views

Trying to load file to device via serial to USB adapter

So I have this device, and it's pretty old. It only has a serial interface. I have a cord that connects to it, and then to the serial port of a computer. This cord is plugged into a serial to usb ...
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1answer
113 views

How to dump USB traffic?

I got an USB gamepad and I would like to see and inspect the signals and commands that this peripherals is actually sending to my PC/kernel: how I can do that ? I was assuming that something like ...
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44 views

automatic disconnection of RAID array

A RAID array connected to my system (Debian 7) via USB frequently disconnects itself for no apparent reason. Upon initial connection to the system, the device is detected, and the array can be ...
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42 views

OTG musb and full speed bulk endpoint throughput

We are developing an application on an OMAP3 device (DM3730 ti). An acquisition board gets samples and sends them to the OMAP board via USB. This acquisition board does a 16KHz sampling which ...