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Operating Systems Linux Ubuntu Does /dev/ttyUSB* causing my usb 3G Dongle doesn't work when plug-in Post 302505351 by Corona688 on Wednesday 16th of March 2011 06:39:13 PM
Old 03-16-2011
Didn't you already create a topic about this?

You might have better luck in our hardware forum, or in an Ubuntu-specific forum.

I don't know why the /dev/ttyUSB devices don't appear, but it seems more like a symptom than a cause. It may be a kernel-related problem. You might be able to get some information from dmesg, compare what you get when you boot with it plugged in with what you get when you plug it in later. Also see what lsusb tells you, it may give you more specific model numbers etc. to hunt for.
 

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lsusb(8)							Linux USB Utilities							  lsusb(8)

NAME
lsusb - list all USB devices SYNOPSIS
lsusb [options] DESCRIPTION
lsusb is a utility for displaying information about all USB buses in the system and all devices connected to them. To make use of all the features of this program, you need to have Linux kernel 2.3.15 or newer which supports the /proc/bus/usb interface. OPTIONS
-v Tells lsusb to be verbose and display detailed information about all devices. -vv Tells lsusb to be very verbose and display even more information (actually everything the PCI device is able to tell). -s [[<bus>]:][<devnum>]] Show only devices in specified bus and devnum. -d [<vendor>]:[<product>] Show only devices with specified vendor and product ID. Both ID's are given in hexadecimal and may be omitted. -p <procpath> Use another path instead of /proc/bus/usb. -D <device> Do not scan the /proc/bus/usb directory, instead display only information if the device whose device file is given. -t Tells lsusb to dump the physical USB device hierarchy as a tree. FILES
/usr/share/hwdata/usb.ids A list of all known USB ID's (vendors, products, classes, subclasses and protocols). /proc/bus/usb An interface to USB devices provided by the post-2.3.15 Linux kernels. Contains per-bus subdirectories with per-device files and a devices file containing a list of all USB devices. SEE ALSO
lspci(8) AUTHOR
Thomas Sailer, <sailer@ife.ee.ethz.ch>. usbutils-0.2 14 September 1999 lsusb(8)
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