Hum, my idea was to install EVERYTHING from git. The backend and the frontend. And if you do so, you have to remove all standard packages from your ubuntu install to avoid conflicts (I should have been more precise for sure).

Le 17/11/2014 18:38, Pierre LINDENBAUM a écrit :
This is not the location of the regularly installed libsane package.> You have installed something compiled from source as well. This is

often a source of problems.  Is there any particular reason you need
to use this self-built version?


Guillaume suggested to install libsane from the git repo. I used the
default options for ./configure that is --prefix=/usr/local
If you end up using the dll backend from /usr/local/lib/sane/ it will

in all likelihood *not* read the configuration in /etc/sane.d/.


you're right ! I've added a debug message in '/etc/epson.conf'.
Running iscan with some debug flags prints the message



(...)
[epson] sane_init, ># epson.conf<
[epson] sane_init, ># HELLO I'm IN /usr/local !<
(...)


I copied all '*.conf' from /usr/local/etc/sane.d/*.conf to /etc/sane.d


$ sudo scanimage  -L
device `epson:libusb:002:003' is a Epson  flatbed scanner

$ sudo sane-find-scanner  | grep USB
found USB scanner (vendor=0x04b8 [EPSON], product=0x0116 [EPSON
Scanner]) at libusb:002:003
# Your USB scanner was (probably) detected. It may or may not be supported by



From what I see iscan loads the latest libraries from /usr/local/lib

Still a problem: I've copied the full debug trace of iscan in:


https://gist.github.com/lindenb/bc7b85f7a4bf71ff500f

please note that the trace contains some non-ascii chars (replaced
here with '####' below :):

(...)
[epson] code   15
[epson] type     ####0x01
[epson] level    0x00
[epson] no option equipment installed
[epson] Unknown type  #####or level , using B3

(...)


It is non-free in the sense that the source is not made available.


I see


Another comment: there is no /dev/usb , all is found under /dev/bus/usb


$ ls -la /dev/bus/usb/002/
total 0
drwxr-xr-x 2 root root       80 Nov 17 17:52 .
drwxr-xr-x 9 root root      180 Nov 17 17:52 ..
crw-rw-r-- 1 root root 189, 128 Nov 17 18:34 001
crw-rw-r-- 1 root root 189, 130 Nov 17 18:34 003



thank you for your help.

Pierre

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