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

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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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9 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
25 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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19 views

Linux kernel module to read out GPS device via USB [migrated]

I'm writing a Linux kernel module to read out a GPS device (a u-blox NEO-7) via USB by using the book Linux Device Drivers. I already can probe and read out data from the device successfully. But, ...
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1answer
23 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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25 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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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
57 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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75 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
138 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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35 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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61 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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In ubuntu, I cannot send two-byte commands over a usb serial port from within a C program [migrated]

I wish to write in C or C++ a program to control a Sony camera connected over a USB serial device (Applied Logic USB to LANC [0600]) running on my Virtual Box guest OS, Ubuntu 12.04. Through putty, I ...
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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
35 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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27 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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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
25 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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29 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
26 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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39 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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47 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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67 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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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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49 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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63 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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20 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
58 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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33 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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33 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 ...
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1answer
121 views

How to read/write to tty* device?

I have a device that sends information over USB to my computer. Arch Linux sets up this device by creating a file named ttyUSB0 in /dev/. I have been using GTKterm to receive this incoming information ...
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1answer
54 views

shell script for mounting external device to mount point

I want to make a script to mount an external device to a particular mount point e.g say /mnt. Let me elaborate my question, suppose I run fdisk -l in terminal I would get this output Disk identifier: ...
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1answer
238 views

No usb 3 Arch linux 3.15.1

Up until my last reboot, I had the ability to use my usb 3 port. I just got the system installed not that long ago, so up until then I'd been configuring and installing drivers, but that was the ...
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1answer
85 views

Could not boot from an external hard drive [duplicate]

I burned a live session of Linux Mint 17 Cinnamon to a USB stick. Then I installed LM17C into an external hard drive by using this USB stick. I managed to do it and even successfully started on my ...
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1answer
143 views

USB passthrough for LXC containers

PROBLEM: So I've been trying to get a usb device (primesense - the OEM reference for the Kinect) to passthrough to an LXC container so I can develop without worrying about polluting my stable system ...
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45 views

Invalid version string 'GNU/Linux'" when creating bootable USB stick

When I tried to create a bootable USB stick using Startup Disk Creator, appear this massege below. Invalid version string 'GNU/Linux'" How can I create a bootable USB stick on Ubuntu 14.04?
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Raid 1 or just mirror SATA and USB Harddisk

I think about getting a Cubieboard, and to set up a Linux with OwnCloud. The board has a SATA and two USB Ports. I would like to store the main data on the SATA-HD and use a USB-HD as backup. How ...
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39 views

USB Ports stopped working

After I locked my screen with CtrlAltL (KDE keyboard shortcut that locks the screen) and went away for 5 minutes all the USB devices stopped working (mouse, keyboard & headset). The devices are ...
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How to get device filename from lsusb output or by device path

Related question: USB connect/disconnect notification When the device is plugged/unplugged, I get instant notification, that's great. But to make it (almost) perfect, I also want to get device ...
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1answer
69 views

How can I add an external CD/DVD writer ?

I want to add an external CD/DVD writer to my Ubuntu 14.04 system (System 76 Ratel): the writers in my local electronics store have USB interfaces, and the drives are advertised as windows and mac ...
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1answer
36 views

Automounting with udev takes too much time

Specifically, using udev to automount usb memory sticks takes about 3-4 seconds according to its own logs. It may not sound like that much, but it is on an embedded distribution for a system that ...
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1answer
37 views

How do I allow non-root access to Nexus 7 2013 LTE (deb) over adb and fastboot?

I need to access my Nexus 7 2013 LTE (deb) over adb and fastboot, but it seems that it's required to be root to be able to run the adb server to be able to access the device due to USB rules. How can ...
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2answers
57 views

Finding an USB device path

Recently I saw this command posted on the internet: ls -l /dev/disk/by-label/ It worked, but I'm concerned, does it work on other Linux distros? How can I find USB device on the computer where USB ...
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2answers
157 views

How to automatically mount an USB device on plugin-time on an already running system?

I know how to use /etc/fstab to automatically mount devices on boot or when doing sudo mount -a, which works perfectly fine. For example, here is my current line for my device UUID=B864-497A ...
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1answer
74 views

Why isn't sda1 showing up in dev and how can I fix that?

I have an embedded Linux device and I was trying to copy some files to it. I plugged in a USB stick, the dmesg shows that it was recognized, but for some reason /dev/sda1 never showed up. I'm trying ...
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1answer
47 views

Use a Linux directory as a USB-OTG device to an Android phone?

I have a really strange idea and I was wondering if I could do it. Many Android custom recoveries allow placing backups in both the internal storage, the external (ie: microSD) storage, and ...
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1answer
131 views

USB device messages flooding dmesg (and console)

When USB mouse is plugged into my laptop, dmesg is flooded with following messages: usb 3-1: USB disconnect, device number 28 usb 3-1: new low-speed USB device number 29 using xhci_hcd usb 3-1: New ...
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1answer
179 views

USB to Virtual Machine XenServer 6.2

I've been fighting with this for a while and still nothing. So here is the deal, I have a XenServer 6.2 machine with many VM. I'm trying to attach the USB Port to the Virtual Machine, to use it with ...
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1answer
166 views

Qemu 2.0 Windows guest - mouse stops working (vnc) when using usb-passthrough

I have installed Qemu 2.0 on an Ubuntu Server 14.04 LTS computer. I use Qemu to run multiple virtual machines. One of them is using Windows 8.1 Pro (x64) and is used for back-ups. The guest runs fine ...