[ale] USB port identification

[Sergio Chaves]

You may need a udev rule to accomplish what you want.
Something like 7.12.12 in this page
http://www.linuxfromscratch.org/lfs/view/6.2/chapter07/symlinks.html


On Wed, Nov 18, 2015 at 7:59 PM, Chris Fowler <cfowler at outpostsentinel.com>
wrote:

> I'm testing this new hardware and have ran into a snag with identifying
> specific USB ports.
>
> There are 2 root hubs.
>
> 1.  2.0 4x ports
> 2.  3.0 2x ports
>
> On the 2.0 it seems that no matter what port I plug my modem into, at boot
> it will be 001:004.
>
> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 001 Device 004: ID 0572:1340 Conexant Systems (Rockwell), Inc.
> Bus 001 Device 003: ID 1a40:0101 Terminus Technology Inc. Hub
> Bus 001 Device 002: ID 8087:07e6 Intel Corp.
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>
> On the older hardware the device # was tied to a specific port.  Both run
> a 2.6.38 kernel. Same software too.
>
> The problem is that I define what USB ports do what. If you plug a
> RTL8188CUS USB wireless adapter in port #1 it will behave as an AP.  If you
> use port #2 it is configured as a station.  The users will not even have
> access to the device in somce cases unless it runs as an AP.  No LCD!  No
> network!
>
> If I use USB to serial adapters then I assign port names based on
> Bus/Device.  The user will then use a temp probe on one, maybe a terminal
> on another, and some sites even have a UPS that I am interfacing via USB
> serial.
>
> Another thing I noticed is that if I unplug the USB modem and plug back in
> it will be assigned 001/005.  On the older hardware this is not the case.
> It is always the same.
>
> Is there any way I can identify the specific USB port on this computer
> that is being used by a device?
>
>
>
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