[sane-devel] Identifying identical scanners dynamically turned on and off

m. allan noah kitno455 at gmail.com
Thu Mar 22 12:23:30 UTC 2012

how does epson2 format the device names now?


On Thu, Mar 22, 2012 at 7:37 AM, Martin Zackrisson
<martin.zackrisson at cmb.gu.se> wrote:
> It is a modified version of the epson2-backend (don't know if the patch of
> last fall has made its way into the main dist).
> The OS is Ubuntu, the latest I think or the latest long-term (not sitting
> close to that computer at present).
> My first thought was to look for the serial too, and unfortunately fujitsu
> don't have any scanner that fits our needs (A4 TPU + many more things), so
> they all have to be Epson v700. Reading its "Programming Guide. Rev. C" it
> seems to agree with you - that the best it can do is to send its 'Product
> Name' and 'ROM Version'.
> I suppose it must be question of learning the inner workings of udev then?
> On 2012-03-22 12:13, m. allan noah wrote:
>> This would depend upon the backend, hardware and OS that you use. The
>> fujitsu backend is capable of reading the serial number of the
>> scanner, and uses that as part of the device name. Other backends
>> cannot do this because the hardware does not know its own serial
>> number. In that case, you would have to give the device a consistent
>> name at the OS level, and somehow get the backend to use that name.
>> allan
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