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

Martin Zackrisson martin.zackrisson at cmb.gu.se
Thu Mar 22 11:37:23 UTC 2012

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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