Before I tried what you suggested below, I had a look at file structure in /sys.

The tree looks like this:

/sys/bus/usb-serial/drivers/

with subdirectories there as follows:

edgeport_2/
edgeport_4/
edgeport_8/
epic/
generic/

There is no sign of io_edgeport/ (which would be required in your suggestion 
below). Do you want me to create this directory before adding the new_id file 
within it?

Also, although the permissions for /sys/bus/usb-serial/drivers/ would appear to 
permit writing by root, I am not allowed to write in this directory (or 
anywhere else in the /sys tree. What's the trick?

Thanks.
doug.


On Feb 15, 2013, at 18:29 PM, Greg KH wrote:

> On Fri, Feb 15, 2013 at 06:25:00PM -0500, Doug Minett wrote:
>> I did some followup on another machine at my disposal running a Debian 
>> 2.6.32-5-686-bigmem on the same hardware as the Ubuntu box - Dell Poweredge 
>> T110 II
>> 
>> I plugged Digi in and had the same response as with the Ubuntu box - 
>> io_edgeport was not loaded/no new devices/same dmesg report.
>> 
>> Then I manually loaded io_edgeport and plugged the Digi in again.
>> 
>> dmesg (after manual load) is a bit different than with Ubuntu:
>> 
>> [29735001.555230] usb 2-1.6: new full speed USB device using ehci_hcd and 
>> address 65
>> [29735001.647709] usb 2-1.6: New USB device found, idVendor=1608, 
>> idProduct=0288
> 
> Ah, this is a new device id, that's why things aren't working.  Linux
> doesn't know how to control this device.
> 
> Perhaps if we add it to the existing io_edgeport driver, it would work,
> can you try that?
> 
> You can do the following, as root:
>       - unplug the device
>       - load the module:
>               modprobe io_edgeport
>       - add a new device id:
>               echo "0x1608 0x0288" > 
> /sys/bus/usb-serial/drivers/io_edgeport/new_id
>       - plug the device in.
> 
> Let us know if that works or not.
> 
> thanks,
> 
> greg k-h

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