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

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How to disable USB devices based on their vendor ID on GNU/Linux?

In that question someone wanted a blacklist for all USB devices, and then only allow specific devices. In this question, we want to accept all USB devices, but prevent the driver (e.g. cdc_acm) from ...
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2answers
350 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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1answer
2k views

Updating Linux Mint Without Internet Access

I can't afford to have an internet connection at home. Is there any way of figuring out what update I need for my system so that I can download the same onto my USB stick from the office internet ...
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3answers
11k views

GSM modem does not create /dev/ttyUSB file

I installed Kannel in a server, and I want to use a GSM 3G USB modem to send/receive SMS messages, as described in section SMS Centers > GSM Modem of the Kannel User Guide. I have already installed, ...
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1answer
709 views

Is it necessary to enable CONFIG_USB_OHCI_HCD , when there's only USB 2.0 ports

Is it necessary to enable CONFIG_USB_OHCI_HCD on a system that has USB 2.0 port only ? I'm not sure those devices present , e.g bluetooth , camera use that driver ? Bus 001 Device 001: ID 1d6b:0002 ...
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1answer
3k views

How can I uniquely identify which device is on USB `hub 6-0:1.0: port 2`?

How can I uniquely identify which device is on USB hub 6-0:1.0: port 2? I receive messages in my dmesg every now and then and I want the system to tell me which device is connected to that port. ...
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2answers
666 views

Launching Gentoo from external hard drive

I have an external hard drive (Transcend TS500GSJ25M - not sure M1, M2 or M3, but guess it's M1) and I'd like to install Gentoo on it. It's pretty easy, using genkernel, though it compile a lot of ...
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2answers
6k views

Is it possible to make a Microsoft LifeCam HD-5000 work under linux?

I am trying to set up a virtual machine which will act as a home security system. (If you've chatted with me in The Tavern, you may know why...) I purchased two USB webcams (Microsoft LifeCam HD-5000) ...
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2answers
6k views

How to use iphone internet tethering via USB with Ubuntu 10.04

What are the steps to use iPhone 3G internet tethering via USB on Ubuntu 10.04? Is there software I need to install on Ubuntu for this? The tethering works fine on Windows.
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1answer
9k views

How to install Fedora from an ISO on a USB?

I have a Fedora 14 x86_64 iso image and I want to install it using a USB stick. How do I get this stick to boot up, and use the image to start the installation? I'm running Debian.
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1answer
44 views

Virtual USB HID device

I'm developing an application that will communicate with attached USB HID device. The problem is that there is no real device yet (it is under development by another part of our team), so, I'd really ...
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616 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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1answer
594 views

udev rule for a USB device and ignoring others

Is it possible to create a udev rule for an USB device and ignore other USB devices? I want my system to support HID USB touchscreen (hid.ko) and ignore HID devices such as keyboards, mice, etc.
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3answers
264 views

USB device to be detected at the “same” /dev point always?

In Linux (actually I'm with CentOS v6.5), whenever I plug in my USB Terminal/Character Device (some kind of USB Adapter) for the first time (after booted), it is detected at: /dev/ttyUSB0 But ...
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1answer
1k views

usb0 -> what exactly is it for?

So far, I found out that on GNU/Linux /media/usb0 seems to be a mount point for Ethernet over USB. Nice. Question: Where is defined, what usb0 is exactly for? I distilled the above mentioned ...
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1answer
2k views

No room on ep ring?

I just switched to tty1, and I'm getting all kinds of output. It all looks like this: [timestamp] xhci_hcd 0000:00:14.0: ERROR no room on ep ring It's happening over 100 times per second, every 5 ...
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1answer
659 views

Getting keyboard to work in debian 6.0 in order to unlock root partition

I just installed Debian 6.0, encrypted / and now I'm trying to boot. When GRUB comes up, I select Debian, it loads the initrd and asks for the root password, however I can't enter anything, because ...
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1answer
3k views

Restart USB mouse driver?

Sometimes, after some event that I can't determine, my USB mouse gets stuttery - like the refresh rate drops down to about 5-10Hz. It still works fine other than that, but it's incredibly annoying, ...
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1answer
4k views

Understanding udev rules and permissions in libusb

I had a problem with my scanner. Xsane worked only as root. Using it as normal user it didn't find any devices. Adding the user to the groups saned or scanner didn't help. Finally I solved the ...
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1answer
4k views

USB 3G Modem for embedded Linux?

I am fairly new to Linux world, I have to develop an application on embedded Linux which sends data over internet. I have to choose a USB 3G modem with a SIM card holder. I would appreciate if anyone ...
3
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1answer
880 views

Bootable USB appearing as HDD not Removable Device

I have a unique problem with an older Toshiba satellite laptop that happens to be a LegacyFree laptop meaning you can't access the bios via the normal F2, Del, Esc, etc. I can only select a boot ...
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1answer
305 views

Linux kernel support for USB gamepads?

I've got an old Logitech USB gamepad that worked well under both Windows and Mac OS X. That is, the gamepad was totally "plug and play" for games run by a Super Nintendo emulator (SNES9X). Does Linux ...
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1answer
807 views

Multiple USB wireless devices?

I have a broadcom wireless card in my laptop and as far as I know, it acts as an USB device. I also have one USB stick wireless device (TL-WN422G - uses ath9k_htc driver) which I want to use at the ...
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1answer
45 views

USB-Insert Authentication for Linux

On Windows, when I insert a USB, I use USB Security. So I'd get "To allow USB access, enter a password." So I'd have to enter a password to be able to even view USB contents or run it. Is there such ...
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1answer
546 views

Trying to read USB Audio Device, but /dev/hidraw0 is unavailable for reading

I'm trying to write a simple driver for my USB Sound Card (just for fun) on Xubuntu 14.04 -- for example, I want to have an opportunity to control volume on my laptop via this device. The problem is ...
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1answer
350 views

Cannot print text via /dev/usb/lp0 on recent printers

I have a strange problem, when I connect an old printer (HP, Epson, at last 4 years old printers) on my linux embedded board, when I type the command echo test > /dev/usb/lp0 it prints correctly. ...
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1answer
180 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
2k 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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1answer
655 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 ...
3
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1answer
610 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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1answer
2k 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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4answers
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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 ...
3
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1answer
2k views

ddrescue extremely slow on USB hard drive

I'm recovering the HDD from my laptop that died (wouldn't boot up at all, Disk Utility reported that there were no problems, but wouldn't mount the disk). I've hooked up the HDD through the USB ...
3
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1answer
634 views

Turn system on by USB keyboard?

To hibernate my Debian Wheezy system, I run the following command: sudo sh -c 'echo disk > /sys/power/state' To wake up the system, I can press any key on my USB keyboard. My understanding of ...
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2answers
336 views

Permissions to print directly to USB printer

I've a netbook with Linux. I've a usb/serial printer and I added the line chmod 666 /dev/tty* to rc.local and it prints straight after a reboot. When I close the lid of a netbook for a while and then ...
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1answer
3k views

USB 3.0 Device not enumerated on USB 3.0 Port in Debian 6.0 OS

I have installed Debian 6.0 OS (Linux kernel 2.6.32 )to test my USB Application as well as Driver. My USB device is working fine on USB 2.0 Port without any issue. But when i tried to connect the ...
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1answer
2k views

USB keyboard only works intermittently in GRUB 2 on reboots - how to make it work consistently?

Something weird is going on with my keyboard. The keyboard is a USB-connected Unicomp, which works absolutely flawlessly once the computer is up and running. However, GRUB 2 (specifically, ...
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1answer
224 views

Is it possible to have two seperate one way (simplex) serial ports to make single tty device?

I am building embeded device, which has IR comunication with PC and it will have two IR Led/detector pairs which are one-way and are setup like this: IR source input commands -> near embeded device ...
3
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1answer
328 views

Creating multiple devices from one device?

Specifically taking a USB device, which normally allows only one process to open it for reading, and clone/duplicate/replicate it so that multiple processes can open and read the input. Something ...
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1answer
8k views

USB to Serial in Chrubuntu - /dev/ttyUSB0 missing

The usbserial stuff has been working so well for me in Ubuntu for a number of years that I have almost forgotten how to troubleshoot it. I just installed Chrubuntu, however, and now my usbserial is ...
3
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1answer
6k views

Two usb wifi adapaters, only wlan0 appears, how to get wlan1?

I'm attempting to connect two wifi usb dongles to a debian system, one is to connect to a local lan, the other I plan to use in adhoc mode to connect to a specific device. You could look at this as an ...
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2answers
834 views

Getting input from a USB device listed with lsusb

I have a CF-1KB barcode reader connected to an RS232 to PS/2 adaptor and a PS/2 to USB adaptor. I'm not sure how the device works so I'm trying to figure it out by looking at what information I'm ...
3
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1answer
2k views

What is the best touch screen kiosk solution?

I'm a web developer and I'm looking for the best stripped-down linux experience that provides a full-screen experience for touch screens. I'll be looking for: a robust experience that stops people ...
3
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1answer
441 views

`power/persist` file not found in USB device sysfs directory

The file /usr/share/doc/linux-doc/usb/persist.txt.gz mentions that the USB-persist capability can be enabled for a given USB device by writing 1 to the file persist in that device's directory in ...
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1answer
44 views

Confused about USB3 connection

My PC motherboard is a Gigabyte Z68A-d3-b3. It is supposed to have two USB3 ports and, indeed, there are two ports on the back panel that are specifically labeled USB3 and have blue connector inserts. ...
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What can cause a usb port speed change?

I have an instrument connected via usb to a OpenSuse (11.1 32) computer. Following the vendor instructions, I've added one rule to udev: ATTR{idVendor}=="0e0d", ATTR{idProduct}=="0003", MODE="0666" ...
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1answer
213 views

No /dev/hidraw device when I plug in a Yubikey

I have a Yubikey NEO, and I'm trying to get it to work on Debian. When I plug it in, I get udev events, but no /dev/hidraw? device. Here's what I know so far: cat /boot/config-$(uname -r) | grep ...
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0answers
141 views

How to make MTP work

I'm experiencing many problems trying to properly connect and access the memory of my phone from my Linux system. I'm running openSUSE 13.1, with KDE, and my phone is a Samsung Galaxy S3 Neo equipped ...
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0answers
225 views

USB Mouse Freezing in Debian / KDE // Keyboard OK

Having problems with seemingly random freezes of my Logitech Wireless Mouse in Debian (KDE). With regards to a number of articles out there, I don't have powertop, mouseemu or laptop-mode-tools ...
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Trouble getting USB printer to 'stick' using udevadm

What I’ve got so far $ udevadm info -a -p$(udevadm info --q path -n /dev/usb/lp1) | grep serial ATTRS{serial}=="544336460792090000" /etc/udev/rules.d/50-udev.rules: SUBSYSTEM=="usb", ...