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

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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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106 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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1answer
176 views

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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2answers
437 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
64 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
95 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
187 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
3k 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
289 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
107 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
603 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
786 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
459 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 ...
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1answer
52 views

Installing linux to run off USB

I have copied a Gnome distro to a USB drive which boots fine on my Mac, I want to install this to another USB drive I have so I can take the USB drive and use it on any PC. I partitioned the USB drive ...
2
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1answer
248 views

usbip: problem getting device attributes: No such file or directory

I try to use an ftdi rs232/usb adapter over ethernet. It's connected to my raspberry pi. pi@raspberrypi ~ $ usbip list -l Local USB devices ================= - busid 1-1 (0424:9512) 1-1:1.0 ...
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1answer
201 views

Creating/Removing a symbolic link when a USB device connects/disconnects

I'm working with an Arduino board and Matlab under Linux. Matlab, unfortunately, doesn't recognize the Arduino board when is connected unless I create a symbolic link to the Arduino board in /dev by: ...
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34 views

Why does USB errors with my mobile phone stop the computer from interacting with services?

I set my Android phone to use "Mass storage" as the connection mode (In Settings → Storage → context menu item USB computer connection) to easily be able to browse the files. Then I plugged ...
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2answers
186 views

Giving more priority to a USB device

I have a keyboard with USB cable connected to computer through a USB 2.0 socket. But when I type fast, Ubuntu ignores some key messages (e.g. I may type CORRECT but what is typed may be CORET) . After ...
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2answers
2k views

How can I enable access to USB devices within VirtualBox guests?

I cannot see any USB devices within my VirtualBox guest VMs from my host. How do I enable access for my guest VMs? ...
2
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1answer
231 views

PPP over USB from RJ11

I have an adapter which on 1 side offers an RJ11 male plug, and on the other side and USB Type A female port, I also have another adapter which is similar but it offers and USB Type A male plug. I ...
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0answers
70 views

Removed USB storage device is still mounted

I'm working on a embedded linux system based on busybox. Sometimes a USB device which is physically removed from the post is still displayed in mount, df or /proc/mounts. If I reattach the device, it ...
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180 views

Modifier keys cannot be mapped to regular keys on USB keyboard with udev

Using an hwdb file, /etc/udev/hwdb.d/99-keyboard.hwdb, I can remap the left Alt key on my USB keyboard as the Ctrl key: keyboard:usb:v*p* KEYBOARD_KEY_700e2=leftctrl This also works when I try to ...
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1answer
477 views

Mounting USB Drive — Cannot delete files unless have su permissions

Is there a way I can automount this USB drive so that I don't need to have root privileges to delete files? This is what I currently have in my fstab file: /dev/sdb1 /mnt/epson auto ...
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6 views

XJacker and PulseAudio connection

Is it possible to connect the XJacker Sound Amplifier (v2) to PulseAudio on Ubuntu? Or is it just XBOX only.
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1answer
450 views

How to safely eject usb hardrive - udisks returns “detach failed: ..”

I have a USB external hard drive with several partitions, and I cannot spin down the hard drive to get it to eject. Any suggestions? I unmounted all partitions through Nautilus, but the drive is still ...
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63 views

How to install and configure USB to serial hub (8 serial ports)?

I have bought a USB to serial hub (8 serial ports) but I don't know how I can install it on my Debian server. On the box, they wrote 'Linux compatible'. What do I need to do to can use it?
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2answers
244 views

Simulate a USB drive using Linux?

Is there any way that I could use what I'll call PC-A to act like a USB device to a second PC, PC-B? i.e. PC-A <<-- Double male USB cable --> PC-B The result I'm looking to achieve is have ...
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2answers
988 views

Unable to remove the files from an usb drive (neither by dd /dev/zero nor by rm -r)

I have a flash usb drive and up till now it has worked well. Recently I recorded iso to it using dd. Now I want to delete it. $ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT ....... sdb ...
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169 views

Device in fstab not mounting at boot

The following is in my /etc/fstab file: UUID=596ac80a-5571-41dc-a00e-b3270ecfe7c4 / ext3 errors=remount-ro 0 1 /dev/sdb1 /home/teamspeak/ts3/files/virtualserver_1/channel_527 ext3 ...
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2answers
2k views

Can't create a bootable (live) usb flash for arch linux

I created a bootable usb from which I was going to install Arch. I did this the following way: sudo dd if=/path_to_arch_.iso of=/dev/sdX But when I tried to boot from this usb flash, I failed. ...
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1k views

Media changed: please insert the disk labeled 'Debian GNU/Linux

I installed Debian 7 using a USB flash drive "burned" from the first DVD ISO of the Debian installation CD/DVD. I did a very minimal install without Debian desktop environment, Print server and ...
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370 views

Save motion output videos in USB Drive

I'm using a USB drive in my Raspberry to store my website. Now I want also save my videos made with motion. I wasn't able to save in a folder different from /tmp/motion so googling I found I had to ...
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1answer
142 views

Show List of USB device to know name /dev/?

I want use two USB webcam with motion, I've connected both to an USB hub, giving from CLI the command sudo lsusb I can see that both cams are connected Bus 001 Device 002: ID 0424:9512 Standard ...
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332 views

linux udev rule to load gadget module for client driver

I'm having a hard time automating loading a gadget module and bringing up the usb0 device as a eth interface. The interface in question is g_ether for a embedded Linux device and connecting to a PC. ...
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3answers
396 views

Send a specific signal to an external USB keyboard? Or, how do I fix fdopen()?

Some background: I'm trying to make the caps lock light on an external keyboard light up on-command when I run a command from the command line. Ideally it would be scriptable, so that I can use it for ...
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0answers
266 views

CDC ACM doesn't working in a custom linux kernel

I've a cubieboard2 running arch linux with a custom linux kernel. In the cubieboard2 I plugged in my usb-serial device (like an arduino), the device is recognized as CDC ACM. My linux kernel has the ...
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1answer
2k views

How to downgrade USB 3.0 to USB 2.0?

I have USB 2.0 device when I plugged this device into the USB 3.0 port of my system then system gets hanged, after researching many of the solutions says that you can downgrade USB 3.0 to USB 2.0. But ...
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1answer
592 views

USB 2.0 device is not working in USB 3.0 ports

I have a Ubuntu 12.04 system. On that system I have one USB 3.0 port. In this port I am trying use my USB 2.0 device, but every time when I plug in that USB 2.0 device into the USB 3.0 port, the ...
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0answers
49 views

usb / virtual com port - is it dead?

I have video gimbal that I am attempting to setup. The device, a Basecam 3 Axis unit, has a micro USB port interface. When I plug a USB cable from my Debian laptop to the gimbal and run "lsusb" I ...
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4answers
121 views

Unwanted console text

For some reason, every time I plug in a USB device, a whole bunch of messages get dumped onto the terminal. (Saying something about device IDs, buffering modes, etc.) How to I prevent this from ...
5
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1answer
623 views

Writing raw images safely to USB sticks

Trying lots of different linux, on all kinds of hardware I find my self typing commands like this quite often: sudo dd if=xubuntu-13.10-desktop-amd64.iso of=/dev/sdc bs=10240 Needless to say, ...
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1answer
155 views

USB modalias. Meaning of numeric values

For the USB modaliases, I know that the values corresponding to the device's vendor and product ids can be found here: http://www.linux-usb.org/usb.ids Which online resources and/or kernel source ...
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1answer
225 views

Targus USB number pad not working in Debian Wheezy

I am running a fresh install of Wheezy x86 and trying to connect a Targus number pad (model AKP10US) which has the USB Vendor/Model IDs of 05A4 / 9840. (FWIW the system is also running in VirtualBox) ...
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1answer
35 views

Is there a reason that Apple's USB vendor ID on Linux is a close anagram of Broadcom's? [closed]

I was poking around in lsusb and I noticed that Apple's USB vendor ID, 05ac, is a very close anagram of Broadcom's, 0a5c. Is there a historical/political/other reason for this, or is it just a ...
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1answer
175 views

Fresh install Windows 7 from USB on machine with Ubuntu and Windows 7

I have a Toshiba laptop l755 S5282 with Windows 7 and Ubuntu 12.04 on it. About a year ago, I pulled an iso file off of DigitalRivers for Windows 7. I did a fresh install of Windows 7 from USB, then ...
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1answer
350 views

Is it possible to simulate/force/fake an USB device unplug and replug on Linux?

So I've got a strange problem that I've been running onto. I've got a bitcoin usb miner, Bitfury, and I'm using CGMiner to mine. When I start the application, as root, the USB device is not detected ...
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0answers
786 views

Why does my USB device not get recognized by Ubuntu?

I seem to have a problem that no else appears to have encountered before (at least a couple of hours Googling has shown this to be the case). I am running Ubuntu 12.04. I plug in the device (Linksys ...
2
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1answer
214 views

Alsa not detecting USB microphone on system boot

I have a USB microphone that works fine, up until I reboot my system. After that, it doesn't work at all until I unplug it and replug it. Based on my (limited) understanding of the components ...
2
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0answers
296 views

How can I set repeat rate of USB keyboard with udev?

How can I get my keyboard repeat rate to apply to a hotplugged USB keyboard? I made a udev rule to set the keyboard repeat delay and rate, /etc/udev/rules.d/99-usb-keyboard.rules with the following ...
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1answer
274 views

USB keypad (HID) not responding in linux but in grub

An external USB keypad I'd like to use gets recognised as a USB HID device, but it is not functional when Linux is booted. It does work when plugged into a Windows desktop and it does work while in ...