Ok, alors, voici :
dpkg -l | grep sane
ii libsane:amd64 1.0.29-0ubuntu5.2 amd64 API library for scanners
ii libsane-common 1.0.29-0ubuntu5.2 all API library for scanners -- documentation and support files
ii libsane-dev:amd64 1.0.29-0ubuntu5.2 amd64 API development library for scanners [development files]
ii libsane-hpaio:amd64 3.20.3+dfsg0-2 amd64 HP SANE backend for multi-function peripherals
ii libsane1:amd64 1.0.29-0ubuntu5.2 amd64 API library for scanners [transitional package]
ii sane 1.0.14-15 amd64 scanner graphical frontends
ii sane-utils 1.0.29-0ubuntu5.2 amd64 API library for scanners -- utilities
ii xsane 0.999-8ubuntu2 amd64 featureful graphical frontend for SANE (Scanner Access Now Easy)
ii xsane-common 0.999-8ubuntu2 all xsane architecture independent files
sudo sane-find-scanner -q
found USB scanner (vendor=0x04b8 [EPSON], product=0x013a [EPSON Scanner]) at libusb:002:008
scanimage -L
device `epson:libusb:002:008' is a Epson flatbed scanner
ls /etc/sane.d/
abaton.conf canon_dr.conf dell1600n_net.conf fujitsu.conf hs2p.conf matsushita.conf pie.conf saned.conf teco1.conf
agfafocus.conf canon_pp.conf dll.conf genesys.conf ibm.conf microtek2.conf pieusb.conf sceptre.conf teco2.conf
apple.conf cardscan.conf dll.d gphoto2.conf kodakaio.conf microtek.conf pixma.conf sharp.conf teco3.conf
artec.conf coolscan2.conf dmc.conf gt68xx.conf kodak.conf mustek.conf plustek.conf sm3840.conf test.conf
artec_eplus48u.conf coolscan3.conf epjitsu.conf hp3900.conf kvs1025.conf mustek_pp.conf plustek_pp.conf snapscan.conf u12.conf
avision.conf coolscan.conf epson2.conf hp4200.conf leo.conf mustek_usb.conf qcam.conf sp15c.conf umax1220u.conf
bh.conf dc210.conf epson.conf hp5400.conf lexmark.conf nec.conf ricoh.conf st400.conf umax.conf
canon630u.conf dc240.conf epsonds.conf hp.conf ma1509.conf net.conf rts8891.conf stv680.conf umax_pp.conf
canon.conf dc25.conf escl.conf hpsj5s.conf magicolor.conf p5.conf s9036.conf tamarack.conf xerox_mfp.conf
cat /etc/sane.d/dll.conf
# dll.conf - Configuration file for the SANE dynamic backend loader
#
# Backends can also be enabled by configuration snippets under the dll.d/
# directory -- third party backends can drop their configuration file in
# this in this directory, named after the backend.
#
# The next line enables the network backend; comment it out if you don't
# need to use a remote SANE scanner over the network -- see sane-net(5)
# and saned(8) for details.
net
abaton
agfafocus
apple
artec
artec_eplus48u
as6e
avision
bh
canon
canon630u
canon_dr
#canon_pp
cardscan
coolscan
#coolscan2
coolscan3
#dc210
#dc240
#dc25
dell1600n_net
dmc
epjitsu
epson
#epson2
epsonds
escl
fujitsu
genesys
#gphoto2
gt68xx
hp
hp3500
hp3900
hp4200
hp5400
hp5590
hpljm1005
hpsj5s
hs2p
ibm
kodak
kodakaio
kvs1025
kvs20xx
kvs40xx
leo
lexmark
ma1509
magicolor
matsushita
microtek
microtek2
mustek
#mustek_pp
mustek_usb
mustek_usb2
nec
niash
#p5
pie
pieusb
pint
pixma
plustek
#plustek_pp
#pnm
qcam
ricoh
ricoh2
rts8891
s9036
sceptre
sharp
sm3600
sm3840
snapscan
sp15c
#st400
#stv680
tamarack
teco1
teco2
teco3
#test
u12
umax
umax1220u
#umax_pp
v4l
xerox_mfp
ls /lib/udev/rules.d | grep libsane
60-libsane.rules
old-60-libsane.rules
Voilà, ça fait beaucoup d'infos 😉