scanner not found

1. Your Linux Distribution and version.
Ubuntu 16.04 LTS

2. Your printer make/model.
Samsung Xpress M2070FW

3. If possible, run 'hp-check -t' and post the output.
hp-check[23894]: info: :
hp-check[23894]: info: :HP Linux Imaging and Printing System (ver. 3.18.6)
hp-check[23894]: info: :Dependency/Version Check Utility ver. 15.1
hp-check[23894]: info: :
hp-check[23894]: info: :Copyright (c) 2001-15 HP Development Company, LP
hp-check[23894]: info: :This software comes with ABSOLUTELY NO WARRANTY.
hp-check[23894]: info: :This is free software, and you are welcome to distribute it
hp-check[23894]: info: :under certain conditions. See COPYING file for more details.
hp-check[23894]: info: :
hp-check[23894]: info: :Note: hp-check can be run in three modes:
hp-check[23894]: info: :1. Compile-time check mode (-c or --compile): Use this mode before compiling the
hp-check[23894]: info: :HPLIP supplied tarball (.tar.gz or .run) to determine if the proper dependencies
hp-check[23894]: info: :are installed to successfully compile HPLIP.
hp-check[23894]: info: :2. Run-time check mode (-r or --run): Use this mode to determine if a distro
hp-check[23894]: info: :supplied package (.deb, .rpm, etc) or an already built HPLIP supplied tarball
hp-check[23894]: info: :has the proper dependencies installed to successfully run.
hp-check[23894]: info: :3. Both compile- and run-time check mode (-b or --both) (Default): This mode
hp-check[23894]: info: :will check both of the above cases (both compile- and run-time dependencies).
hp-check[23894]: info: :
hp-check[23894]: info: :Check types:
hp-check[23894]: info: :a. EXTERNALDEP - External Dependencies
hp-check[23894]: info: :b. GENERALDEP - General Dependencies (required both at compile and run time)
hp-check[23894]: info: :c. COMPILEDEP - Compile time Dependencies
hp-check[23894]: info: :d. [All are run-time checks]
hp-check[23894]: info: :PYEXT SCANCONF QUEUES PERMISSION
hp-check[23894]: info: :
hp-check[23894]: info: :Status Types:
hp-check[23894]: info: : OK
hp-check[23894]: info: : MISSING - Missing Dependency or Permission or Plug-in
hp-check[23894]: info: : INCOMPAT - Incompatible dependency-version or Plugin-version
hp-check[23894]: info: :
hp-check[23894]: info: :
hp-check[23894]: info: :---------------
hp-check[23894]: info: :| SYSTEM INFO |
hp-check[23894]: info: :---------------
hp-check[23894]: info: :
hp-check[23894]: info: : Kernel: 4.4.0-131-generic #157-Ubuntu SMP Thu Jul 12 15:51:36 UTC 2018 GNU/Linux
 Host: fiorenti-Inspiron-5558
 Proc: 4.4.0-131-generic #157-Ubuntu SMP Thu Jul 12 15:51:36 UTC 2018 GNU/Linux
 Distribution: ubuntu 16.04
hp-check[23894]: info: : Bitness: 64 bit

hp-check[23894]: info: :
hp-check[23894]: info: :-----------------------
hp-check[23894]: info: :| HPLIP CONFIGURATION |
hp-check[23894]: info: :-----------------------
hp-check[23894]: info: :
hp-check[23894]: info: :HPLIP-Version: HPLIP 3.18.6
hp-check[23894]: info: :HPLIP-Home: /usr/share/hplip
hp-check[23894]: info: :HPLIP-Installation: Auto installation is supported for ubuntu distro 16.04 version
hp-check[23894]: info: :
hp-check[23894]: info: :Current contents of '/etc/hp/hplip.conf' file:
hp-check[23894]: info: :# hplip.conf. Generated from hplip.conf.in by configure.

[hplip]
version=3.18.6

[dirs]
home=/usr/share/hplip
run=/var/run
ppd=/usr/share/ppd/hplip/HP
ppdbase=/usr/share/ppd/hplip
doc=/usr/share/doc/hplip-3.18.6
html=/usr/share/doc/hplip-3.18.6
icon=/usr/share/applications
cupsbackend=/usr/lib/cups/backend
cupsfilter=/usr/lib/cups/filter
drv=/usr/share/cups/drv/hp
bin=/usr/bin
apparmor=/etc/apparmor.d
# Following values are determined at configure time and cannot be changed.
[configure]
network-build=yes
libusb01-build=no
pp-build=no
gui-build=yes
scanner-build=yes
fax-build=yes
dbus-build=yes
cups11-build=no
doc-build=yes
shadow-build=no
hpijs-install=no
foomatic-drv-install=no
foomatic-ppd-install=no
foomatic-rip-hplip-install=no
hpcups-install=yes
cups-drv-install=yes
cups-ppd-install=no
internal-tag=3.18.6
restricted-build=no
ui-toolkit=qt4
qt3=no
qt4=yes
qt5=no
policy-kit=no
lite-build=no
udev_sysfs_rules=no
hpcups-only-build=no
hpijs-only-build=no
apparmor_build=yes
class-driver=no

hp-check[23894]: info: :
hp-check[23894]: info: :Current contents of '/var/lib/hp/hplip.state' file:
hp-check[23894]: info: :Plugins are not installed. Could not access file: No such file or directory
hp-check[23894]: info: :
hp-check[23894]: info: :Current contents of '~/.hplip/hplip.conf' file:
hp-check[23894]: info: :[upgrade]
notify_upgrade = true
last_upgraded_time = 1532722294
pending_upgrade_time = 0

[settings]
systray_visible = 0
systray_messages = 0

[last_used]
device_uri =
printer_name =
working_dir = .

[commands]
scan = /usr/bin/xsane -V %SANE_URI%

[refresh]
rate = 30
enable = false
type = 1

[polling]
enable = false
interval = 5
device_list =

[fax]
voice_phone =
email_address =

[installation]
date_time = 07/28/18 11:30:18
version = 3.18.6

hp-check[23894]: info: : <Package-name> <Package-Desc> <Required/Optional> <Min-Version> <Installed-Version> <Status> <Comment>
hp-check[23894]: info: :
hp-check[23894]: info: :--------------------------
hp-check[23894]: info: :| External Dependencies |
hp-check[23894]: info: :--------------------------
hp-check[23894]: info: :
hp-check[23894]: info: : gs GhostScript - PostScript and PDF language interpreter and previewer REQUIRED 7.05 9.18 OK -
hp-check[23894]: info: : xsane xsane - Graphical scanner frontend for SANE OPTIONAL 0.9 0.999 OK -
hp-check[23894]: info: : policykit PolicyKit - Administrative policy framework OPTIONAL - 0.105 OK -
hp-check[23894]: info: : network network -wget OPTIONAL - 1.17.1 OK -
hp-check[23894]: info: : avahi-utils avahi-utils OPTIONAL - 0.6.32 OK -
hp-check[23894]: info: : cups CUPS - Common Unix Printing System REQUIRED 1.1 2.1.3 OK 'CUPS Scheduler is running'
hp-check[23894]: info: : scanimage scanimage - Shell scanning program OPTIONAL 1.0 1.0.25 OK -
hp-check[23894]: info: : dbus DBus - Message bus system REQUIRED - 1.10.6 OK -
hp-check[23894]: info: :
hp-check[23894]: info: :-------------------------
hp-check[23894]: info: :| General Dependencies |
hp-check[23894]: info: :-------------------------
hp-check[23894]: info: :
hp-check[23894]: info: : python3-pyqt4-dbus PyQt 4 DBus - DBus Support for PyQt4 OPTIONAL 4.0 4.11.4 OK -
hp-check[23894]: info: : libpthread libpthread - POSIX threads library REQUIRED - b'2.23' OK -
hp-check[23894]: info: : libusb libusb - USB library REQUIRED - 1.0 OK -
hp-check[23894]: info: : libcrypto libcrypto - OpenSSL cryptographic library REQUIRED - 1.0.2 OK -
hp-check[23894]: info: : python3-devel Python devel - Python development files REQUIRED 2.2 3.5.2 OK -
hp-check[23894]: info: : python3-reportlab Reportlab - PDF library for Python OPTIONAL 2.0 3.3.0 OK -
hp-check[23894]: info: : python3-pil PIL - Python Imaging Library (required for commandline scanning with hp-scan) OPTIONAL - 1.1.7 OK -
hp-check[23894]: info: : cups-devel CUPS devel- Common Unix Printing System development files REQUIRED - 2.1.3 OK -
hp-check[23894]: info: : libjpeg libjpeg - JPEG library REQUIRED - - OK -
hp-check[23894]: info: : sane-devel SANE - Scanning library development files REQUIRED - 1.0.25 OK -
hp-check[23894]: info: : sane SANE - Scanning library REQUIRED - 1.0.25 OK -
hp-check[23894]: info: : python3X Python 2.2 or greater - Python programming language REQUIRED 2.2 3.5.2 OK -
hp-check[23894]: info: : python3-notify2 Python libnotify - Python bindings for the libnotify Desktop notifications OPTIONAL - - OK -
hp-check[23894]: info: : cups-image CUPS image - CUPS image development files REQUIRED - 2.1.3 OK -
hp-check[23894]: info: : python3-pyqt4 PyQt 4- Qt interface for Python (for Qt version 4.x) REQUIRED 4.0 4.11.4 OK -
hp-check[23894]: info: : libnetsnmp-devel libnetsnmp-devel - SNMP networking library development files REQUIRED 5.0.9 5.7.3 OK -
hp-check[23894]: info: : python3-dbus Python DBus - Python bindings for DBus REQUIRED 0.80.0 1.2.0 OK -
hp-check[23894]: info: : python3-xml Python XML libraries REQUIRED - 2.1.0 OK -
hp-check[23894]: info: :
hp-check[23894]: info: :---------------
hp-check[23894]: info: :| COMPILEDEP |
hp-check[23894]: info: :---------------
hp-check[23894]: info: :
hp-check[23894]: info: : libtool libtool - Library building support services REQUIRED - 2.4.6 OK -
hp-check[23894]: info: : make make - GNU make utility to maintain groups of programs REQUIRED 3.0 4.1 OK -
hp-check[23894]: info: : gcc gcc - GNU Project C and C++ Compiler REQUIRED - 5.4.0 OK -
hp-check[23894]: info: :
hp-check[23894]: info: :----------------------
hp-check[23894]: info: :| Python Extentions |
hp-check[23894]: info: :----------------------
hp-check[23894]: info: :
hp-check[23894]: info: : cupsext CUPS-Extension REQUIRED - 3.18.6 OK -
hp-check[23894]: info: : hpmudext IO-Extension REQUIRED - 3.18.6 OK -
hp-check[23894]: info: :
hp-check[23894]: info: :-----------------------
hp-check[23894]: info: :| Scan Configuration |
hp-check[23894]: info: :-----------------------
hp-check[23894]: info: :
hp-check[23894]: info: : scanext Scan-SANE-Extension REQUIRED - 3.18.6 OK -
hp-check[23894]: info: : hpaio HPLIP-SANE-Backend REQUIRED - 3.18.6 OK 'hpaio found in /etc/sane.d/dll.conf'
hp-check[23894]: info: :
hp-check[23894]: info: :-----------------------
hp-check[23894]: info: :| Other Dependencies |
hp-check[23894]: info: :-----------------------
hp-check[23894]: info: :
hp-check[23894]: info: :
hp-check[23894]: info: :------------------------------
hp-check[23894]: info: :| DISCOVERED SCANNER DEVICES |
hp-check[23894]: info: :------------------------------
hp-check[23894]: info: :
hp-check[23894]: info: :No Scanner found.
hp-check[23894]: info: :
hp-check[23894]: info: :--------------------------
hp-check[23894]: info: :| DISCOVERED USB DEVICES |
hp-check[23894]: info: :--------------------------
hp-check[23894]: info: :
hp-check[23894]: info: :No devices found.
hp-check[23894]: info: :
hp-check[23894]: info: :---------------------------------
hp-check[23894]: info: :| INSTALLED CUPS PRINTER QUEUES |
hp-check[23894]: info: :---------------------------------
hp-check[23894]: info: :
hp-check[23894]: info: :
hp-check[23894]: info: :CLP-300splc
hp-check[23894]: info: :-----------
hp-check[23894]: info: :Type: Unknown
hp-check[23894]: info: :Device URI: ///dev/null
hp-check[23894]: info: :
hp-check[23894]: info: :Samsung-M2070-Series
hp-check[23894]: info: :--------------------
hp-check[23894]: info: :Type: Unknown
hp-check[23894]: info: :Device URI: usb://Samsung/M2070%20Series?serial=ZF46B8KK3C00JKP&interface=1
hp-check[23894]: info: :PPD: /etc/cups/ppd/Samsung-M2070-Series.ppd
hp-check[23894]: info: :PPD Description: Samsung M2070 Series
hp-check[23894]: info: :Printer status: printer Samsung-M2070-Series is idle. enabled since sab 28 lug 2018 11:08:45 CEST
warning: Printer is not HPLIP installed. Printers must use the hp: or hpfax: CUPS backend for HP-Devices.
hp-check[23894]: info: :
hp-check[23894]: info: :
hp-check[23894]: info: :--------------
hp-check[23894]: info: :| PERMISSION |
hp-check[23894]: info: :--------------
hp-check[23894]: info: :
hp-check[23894]: info: :
hp-check[23894]: info: :-----------
hp-check[23894]: info: :| SUMMARY |
hp-check[23894]: info: :-----------
hp-check[23894]: info: :
hp-check[23894]: info: :Missing Required Dependencies
hp-check[23894]: info: :-----------------------------
hp-check[23894]: info: :None
hp-check[23894]: info: :
hp-check[23894]: info: :Missing Optional Dependencies
hp-check[23894]: info: :-----------------------------
hp-check[23894]: info: :None

hp-check[23894]: info: :
hp-check[23894]: info: :Total Errors: 0
hp-check[23894]: info: :Total Warnings: 1
hp-check[23894]: info: :
hp-check[23894]: info: :
hp-check[23894]: info: :Done.

4. A detailed explanation of your problem.

I installed the driver downloaded by Samsung support site.
I connected the printer eith ny PC (with USB cable).
 The printer works but the scanner no.

I tried with hplip, but the scanner is not detected

5. Steps to recreate the problem.

In Device Discovery methods, i tried all connection I/O types, but
the scanner is not found (no device found)