Merci, j'avais loupé l'info, et désolé.
Voilà les infos :
tad@tad:~$ cat /etc/lsb-release && uname -i && groups && lsusb
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.1 LTS"
x86_64
tad adm cdrom sudo audio dip plugdev lpadmin sambashare
Bus 002 Device 004: ID 0a5c:5801 Broadcom Corp. BCM5880 Secure Applications Processor with fingerprint swipe sensor
Bus 002 Device 003: ID 24ae:1100
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 1bcf:2980 Sunplus Innovation Technology Inc.
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
tad@tad:~$
tad@tad:~$ dpkg -l | grep sane
ii libsane:amd64 1.0.31+git20200905-focal2 amd64 API library for scanners
ii libsane-common 1.0.31+git20200905-focal2 all API library for scanners -- documentation and support files
ii libsane-hpaio:amd64 3.20.3+dfsg0-2 amd64 HP SANE backend for multi-function peripherals
ii libsane1:amd64 1.0.31+git20200905-focal2 amd64 API library for scanners [transitional package]
ii sane-utils 1.0.31+git20200905-focal2 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
tad@tad:~$
tad@tad:~$ sudo sane-find-scanner -q
found USB scanner (vendor=0x04b8 [EPSON], product=0x0131 [EPSON Scanner]) at libusb:002:008
tad@tad:~$
tad@tad:~$ scanimage -L
No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
tad@tad:~$
tad@tad:~$ ls /etc/sane.d/
abaton.conf dll.d leo.conf s9036.conf
agfafocus.conf dmc.conf lexmark.conf saned.conf
apple.conf epjitsu.conf ma1509.conf sceptre.conf
artec.conf epson2.conf magicolor.conf sharp.conf
artec_eplus48u.conf epson.conf matsushita.conf sm3840.conf
avision.conf epsonds.conf microtek2.conf snapscan.conf
bh.conf escl.conf microtek.conf sp15c.conf
canon630u.conf fujitsu.conf mustek.conf st400.conf
canon.conf genesys.conf mustek_pp.conf stv680.conf
canon_dr.conf gphoto2.conf mustek_usb.conf tamarack.conf
canon_lide70.conf gt68xx.conf nec.conf teco1.conf
canon_pp.conf hp3900.conf net.conf teco2.conf
cardscan.conf hp4200.conf p5.conf teco3.conf
coolscan2.conf hp5400.conf pie.conf test.conf
coolscan3.conf hp.conf pieusb.conf u12.conf
coolscan.conf hpsj5s.conf pixma.conf umax1220u.conf
dc210.conf hs2p.conf plustek.conf umax.conf
dc240.conf ibm.conf plustek_pp.conf umax_pp.conf
dc25.conf kodakaio.conf qcam.conf xerox_mfp.conf
dell1600n_net.conf kodak.conf ricoh.conf
dll.conf kvs1025.conf rts8891.conf
tad@tad:~$
tad@tad:~$ 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_lide70
#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
tad@tad:~$
tad@tad:~$ ls /lib/udev/rules.d | grep libsane
60-libsane.rules
tad@tad:~$
