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

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60 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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160 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
384 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
367 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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54 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
222 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
746 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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153 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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883 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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305 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
123 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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0answers
298 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
374 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
252 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
537 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
46 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
116 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 ...
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1answer
517 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
138 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
194 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
34 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
149 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
336 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
560 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 ...
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1answer
189 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
275 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 ...
3
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1answer
238 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 ...
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4answers
2k views

Why does “cat ttyUSB0” not produce output?

I connected an infrared receiver to a USB port ... (the last line of dmesg tells device file) $ dmesg [10496.596063] usb 7-2: new full-speed USB device number 2 using uhci_hcd [10496.751112] usb 7-2: ...
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1answer
1k views

usb kernel module does not load on demand but works fine with insmod and modprobe from the shell

I have a USB Linux Kernel module that compiles and builds. Running insmod loads my module and dmseg and tail -f /var/log/debug shows me it works as expected. Running depmod -a then modprobe from the ...
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1answer
273 views

Make a computer act as a virtual USB device for other equipments

Some applications simulate a virtual USB or CD Rom drive as if a USB drive is attached to the computer. Is there any configuration or application that provides a virtual USB drive, not for the the ...
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2answers
159 views

CUPS libusbx-devel is needed error when trying to build cups-1.7.1 from source

I have been trying to build CUPS 1.7.1 on RHEL 5.6 using $ sudo rpmbuild -ta ./cups-1.7.1-source.tar.bz2 and was getting: error: Failed build dependencies: libusbx-devel is needed by ...
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1answer
2k views

Linux Mint 16: Android Device not listed with lsusb

I've installed Linux Mint 16 on my new PC and found out that my plugged in Huawei U8850 Android 2.3.5 device is not listed with the lsusb command: phone plugged in: $ lsusb Bus 002 Device 002: ID ...
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0answers
72 views

Stuck/hung upon connect usb device

I have a device the is coming up 'busy' as soon as I plug it in. I even sniffed the usb connection and all looks normal. How do I find out what is capturing the device? How do I free it up? ...
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2answers
42 views

Snapshot of drive

Does technology exist which allows you to take an instantanious snapshot of a drive? At the moment, I am using dd which takes a few minutes to create an image of a usb drive to my hdd. Is it ...
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2answers
87 views

Automatically backup usb drive to computer

I am trying to create a personal sync system for my project. I don't want to use something like dropbox, bittorrent sync, owncloud etc for various reasons. At the moment, I have my computers setup ...
0
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0answers
266 views

How do I emulate a USB stick with an external CDROM drive?

I am working with a Linux-based high-security network appliance (hereon: device) and do not have access to the user space so I can't log in. The only thing I can do is send it commands to upgrade ...
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0answers
187 views

Connecting multiple USB RNDIS devices to PC in the same network

Running an Ubuntu 12.04.4 I have the following issue: I want to connect multiple USB RNDIS devices to one PC. Additionaly, every device should be in the same network. The problem is that only one ...
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1answer
260 views

Problem with Angstrom USB driver

I am connecting a Huawei E3131B USB 3G modem to my Beaglebone Black running Angstrom. When I connect it directly, the USB acts funny. Sometimes it picks up the modem, sometimes it dissapears from ...
0
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1answer
372 views

rs232 to usb not working

I also asked this question on AskUbuntu but there nobody comments on it I have a konig rs232 serial to usb adapter (no FTDI chip), but when I try to connect to a cisco switch/router (via Putty, ...
2
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1answer
817 views

Map physical USB device path to the Bus/Device number returned by lsusb

I need to get the title of the attached USB device. I can do that with lsusb. udev allows some substitutions when I write rules: say, we can use $kernel to get name of the device, or $devpath to get ...
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1answer
461 views

Can't install Crunchbang

I wanted to install Crunchbang 11 x64 from my USB (8GB, fat32), but when the installer starts, it aborts because the installer doesn't find a Crunchbang CD in my drive. I tried it via the dd command ...
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1answer
24 views

Access USB device of another machine as if it was locally plugged?

I would like to use, on server A, an USB webcam that is physically plugged on server B. Is there a way to mount the /dev/video0 of server B on server A (as /dev/video0, or /dev/video1, etc.). Both ...
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3answers
1k views

USB keyboard doesn't work with Debian installer

I have a wired USB keyboard. I've written the latest netinstall Wheezy image on my USB pendrive (using dd). It boots but the installer doesn't recognize the keyboard! (The same pendrive works on my ...
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0answers
46 views

USB bEndpointAddress varies when run on different targets

I am running a target application that implements the usb gadget driver FunctionFS and has 4 endpoints. I write the descriptors to the endpoint ep0 and the other 4 endpoints are opened for read/write ...
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0answers
57 views

How to have X server on another graphics card which keeps refreshing when I'm working on my main display?

For presentations I want to use the external USB connected video adapter connected to the projector (especially as the standard VGA output in my laptop got damaged). My idea was to start a dedicated ...
2
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0answers
110 views

RNDIS Server to make a computer as a peripheral

First of all my goal is this, have a computer as a peripheral device to connect it to anyone's computer with ssh protocol or web. The idea is doing this by using a plug and play USB cable . Facts ...
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0answers
106 views

Ubuntu - USB device not discovered after system restart

I have an USB device that after pluging in is visible as /dev/ttyACM0. Unfortunately, after system restart, it is not beeing discovered and I have to plug it out and in again to work. I have found a ...