Questions[hplip](ubuntu)

After upgrade from 19.10 to 20.04 I've autoremoved a lot of deprecated packages. During hplip upgrade I've confirmed using maintainer's version of configuration files. But after Ubuntu restarting, hp 1020 printer stopped printing. Hplip toolbox hanged each time I was refreshing its window. So I've purged and uninstalled hplip completely.

Installing using this guide installs hplip 3.20.3 version which have been installed earlier.

So I've downloaded 3.20.5 version from here for Ubuntu, chmoded it with x permission and run it: ./hplip-3.20.5.run.

It asked if I want to install missing dependencies:

Package-Name         Component            Required/Optional   
pyqt5-dbus           gui_qt5              OPTIONAL            
reportlab            fax                  OPTIONAL            
pyqt5                gui_qt5              REQUIRED            
python-notify        gui_qt5              OPTIONAL

I said y, but, for python-pyqt5 package I've got:

error: Command failed. Re-try #3...
Running 'sudo apt-get install --assume-yes python-pyqt5'
Please wait, this may take several minutes...
error: Package install command failed with error code 100

For python-dbus.mainloop.pyqt5 package:

error: Command failed. Re-try #3...
Running 'sudo apt-get install --assume-yes python-dbus.mainloop.pyqt5'
Please wait, this may take several minutes...
error: Package install command failed with error code 100

For python-notify package:

error: Command failed. Re-try #3...
Running 'sudo apt-get install --assume-yes python-notify'
Please wait, this may take several minutes...
error: Package install command failed with error code 100

For python-reportlab:

error: Command failed. Re-try #3...
Running 'sudo apt-get install --assume-yes python-reportlab'
Please wait, this may take several minutes...
error: Package install command failed with error code 100

I've skipped these packages installation because it was impossible to install them. At the end, I've got the next errors:

warning: Some HPLIP functionality might not function due to missing package(s).
error: A required dependency 'pyqt5 (PyQt 5- Qt interface for Python (for Qt version 4.x))' is still missing.


RUNNING POST-PACKAGE COMMANDS
-----------------------------
OK


RE-CHECKING DEPENDENCIES
------------------------
error: A required dependency 'pyqt5 (PyQt 5- Qt interface for Python (for Qt version 4.x))' is still missing.
error: Installation cannot continue without this dependency.
error: Please manually install this dependency and re-run this installer.

I've also downloaded hplip-3.20.5-plugin.run from here

$ bash hplip-3.20.5-plugin.run
Verifying archive integrity... All good.
Uncompressing HPLIP 3.20.5 Plugin Self Extracting Archive..............................................................
Error setting home directory: /etc/hp/hplip.conf not found. Is HPLIP installed?

Universe/Multiverse repositories are enabled, but:

$ apt-cache search python-pyqt5
python-pyqt5.qwt-doc - Python Qwt6 technical widget library, documentation and examples
$ apt-cache search python-reportlab
python-reportlab-doc - Documentation for the ReportLab Python library (PDF format)
$ apt-cache search python-dbus.mainloop.pyqt5
$ apt-cache search python-notify
python3-notify2 - desktop notifications API for Python 3

Packages python3-pyqt5, python3-reportlab, python3-notify2, python3-dbus.mainloop.pyqt5 are installed and are already the newest versions.

I could also see, for example, python-pyqt5 package is available in 19.10 repository, but this package requires qtbase-abi-5-12-4 package which does not exist there in eoan's repository. 18.04's python-pyqt5 package requires different qtbase-abi package, which is not present in bionic's repository.

Does it mean, phlip-3.20.5 is not compatible with 20.04 or maybe there some additional repository exists which contains these four packages and theirs dependencies?

Update:

• Installed hplip, hplip-data, hplip-gui packages.

• Launched hplip-gui from launcher

• Received the log in journalctl -f:

    Jun 07 23:14:13 ubuntu hplip.desktop[17823]: error: Unable to locate models.dat file
    Jun 07 23:14:13 ubuntu /hp-toolbox[17823]: [17823]: error: Unable to locate models.dat file
    Jun 07 23:14:13 ubuntu hplip.desktop[17823]: HP Linux Imaging and Printing System (ver. 0.0.0)
    Jun 07 23:14:13 ubuntu hplip.desktop[17823]: HP Device Manager ver. 15.0
    Jun 07 23:14:13 ubuntu hplip.desktop[17823]: Copyright (c) 2001-18 HP Development Company, LP
    Jun 07 23:14:13 ubuntu hplip.desktop[17823]: This software comes with ABSOLUTELY NO WARRANTY.
    Jun 07 23:14:13 ubuntu hplip.desktop[17823]: This is free software, and you are welcome to distribute it
    Jun 07 23:14:13 ubuntu hplip.desktop[17823]: under certain conditions. See COPYING file for more details.
    Jun 07 23:14:13 ubuntu hplip.desktop[17823]: Traceback (most recent call last):
    Jun 07 23:14:13 ubuntu hplip.desktop[17823]:   File "/usr/bin/hp-toolbox", line 269, in <module>
    Jun 07 23:14:13 ubuntu hplip.desktop[17823]:     QApplication, ui_package = utils.import_dialog(ui_toolkit)
    Jun 07 23:14:13 ubuntu hplip.desktop[17823]: TypeError: cannot unpack non-iterable NoneType object
  

hplip-gui have not been started: nothing appeared on the desktop.

Newer hplip-3.20.6 also does not support Ubuntu 20.04.

I recently upgraded a 18.04 release to 20.04 (early, I know), and wiped away my manually installed 'hplip' package (3.16.11) and installed the official package from the release (3.20.3+dgfsg0-2). All seemed to be well until I started getting messages to update my driver. Making sure I had nothing else to print today, I followed the instructions only to have the 'hp-plugin' command fail to download the plugin with the following backtrace...

Traceback (most recent call last):
  File "/usr/share/hplip/ui5/plugindialog.py", line 248, in NextButton_clicked
    status, download_plugin_file, error_str = self.pluginObj.download(self.plugin_path,self.plugin_download_callback)
  File "/usr/share/hplip/installer/pluginhandler.py", line 254, in download
    core = core_install.CoreInstall()
  File "/usr/share/hplip/installer/core_install.py", line 239, in __init__
    self.passwordObj = password.Password(ui_mode)
  File "/usr/share/hplip/base/password.py", line 88, in __init__
    self.__readAuthType()  # self.__authType
  File "/usr/share/hplip/base/password.py", line 110, in __readAuthType
    distro_name = get_distro_name().lower()
  File "/usr/share/hplip/base/password.py", line 78, in get_distro_name
    return distro.linux_distribution(full_distribution_name=False)[0]
  File "/usr/lib/python3/dist-packages/distro.py", line 122, in linux_distribution
    return _distro.linux_distribution(full_distribution_name)
  File "/usr/lib/python3/dist-packages/distro.py", line 677, in linux_distribution
    self.version(),
  File "/usr/lib/python3/dist-packages/distro.py", line 737, in version
    self.lsb_release_attr('release'),
  File "/usr/lib/python3/dist-packages/distro.py", line 899, in lsb_release_attr
    return self._lsb_release_info.get(attribute, '')
  File "/usr/lib/python3/dist-packages/distro.py", line 552, in __get__
    ret = obj.__dict__[self._fname] = self._f(obj)
  File "/usr/lib/python3/dist-packages/distro.py", line 1012, in _lsb_release_info
    stdout = subprocess.check_output(cmd, stderr=devnull)
  File "/usr/lib/python3.8/subprocess.py", line 411, in check_output
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
  File "/usr/lib/python3.8/subprocess.py", line 512, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '('lsb_release', '-a')' returned non-zero exit status 1.

Downloading the plugin program manually and trying to install it that way yielded the same result. What's going on here? It doesn't appear that the lsb_release module is missing, and running /usr/bin/lsb_release -a works fine and doesn't return any errors.

$ apt-cache policy hplip-gui
hplip-gui:
  Installed: 3.20.3+dfsg0-2
  Candidate: 3.20.3+dfsg0-2
  Version table:
 *** 3.20.3+dfsg0-2 500
        500 http://us.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu focal/universe i386 Packages
        100 /var/lib/dpkg/status
$ dpkg -l | grep -i hplip
ii  hplip                                                       3.20.3+dfsg0-2                                     amd64        HP Linux Printing and Imaging System (HPLIP)
ii  hplip-data                                                  3.20.3+dfsg0-2                                     all          HP Linux Printing and Imaging - data files
ii  hplip-doc                                                   3.20.3+dfsg0-2                                     all          HP Linux Printing and Imaging - documentation
ii  hplip-gui                                                   3.20.3+dfsg0-2                                     all          HP Linux Printing and Imaging - GUI utilities (Qt-based)

Running the hp-plugin command from the command line prints the stack twice, and the first iteration has a few more complaints...

  File "/usr/lib/python3.8/subprocess.py", line 512, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '('lsb_release', '-a')' returned non-zero exit status 1.
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 144, in apport_excepthook
    with os.fdopen(os.open(pr_filename,
PermissionError: [Errno 13] Permission denied: '/var/crash/_usr_share_hplip_plugin.py.1000.crash'

I have no problem writing files as a regular user in /var/crash, so I'm not sure where the problem is here.

I'd mentioned that running lsb_release -a worked fine from the command line, but neglected to provide the output of that...

$ lsb_release -a 
LSB Version:    core-11.1.0ubuntu2-noarch:printing-11.1.0ubuntu2-noarch:security-11.1.0ubuntu2-noarch
Distributor ID: Ubuntu
Description:    Ubuntu 20.04 LTS
Release:    20.04
Codename:   focal
$ echo $?
0

Running hp-plugin -i -gseems to indicate that the real problem is on hp's side...

hp-plugin[310176]: debug: /usr/bin/wget --cache=off --tries=3 --timeout=60 --output-document=- http://www.hp.com --spider -S
hp-plugin[310176]: debug: Spider mode enabled. Check if remote file exists.
--2020-05-31 09:36:45--  http://www.hp.com/
Resolving www.hp.com (www.hp.com)... 15.73.200.23, 15.73.200.22
Connecting to www.hp.com (www.hp.com)|15.73.200.23|:80... connected.
HTTP request sent, awaiting response... 
  HTTP/1.1 301 Moved Permanently
  Server: Apache
  X-Frame-Options: SAMEORIGIN
  Cache-Control: no-store, no-cache, must-revalidate, max-age=0, max-age=7200
  Location: http://www-redirect.ext.hp.com
  Expires: Sun, 31 May 2020 15:36:45 GMT
  Vary: Accept-Encoding
  Content-Type: text/html; charset=iso-8859-1
  Accept-Ranges: bytes
  Date: Sun, 31 May 2020 13:36:45 GMT
  X-Varnish: 1131355252
  Age: 0
  Via: 1.1 varnish
  Connection: keep-alive
  X-Varnish-Origin: g2t3073.austin.hp.com
  X-Cache: MISS
Location: http://www-redirect.ext.hp.com [following]
Spider mode enabled. Check if remote file exists.
--2020-05-31 09:36:45--  http://www-redirect.ext.hp.com/
Resolving www-redirect.ext.hp.com (www-redirect.ext.hp.com)... 96.7.23.193
Connecting to www-redirect.ext.hp.com (www-redirect.ext.hp.com)|96.7.23.193|:80... connected.
HTTP request sent, awaiting response... 
  HTTP/1.1 301 Moved Permanently
  Server: AkamaiGHost
  Content-Length: 0
  Location: https://www8.hp.com/us/en/home.html
  Cache-Control: max-age=0
  Expires: Sun, 31 May 2020 13:36:45 GMT
  Date: Sun, 31 May 2020 13:36:45 GMT
  Connection: keep-alive
Location: https://www8.hp.com/us/en/home.html [following]
Spider mode enabled. Check if remote file exists.
--2020-05-31 09:36:45--  https://www8.hp.com/us/en/home.html
Resolving www8.hp.com (www8.hp.com)... 184.24.150.205
Connecting to www8.hp.com (www8.hp.com)|184.24.150.205|:443... connected.
HTTP request sent, awaiting response... 
  HTTP/1.1 200 OK
  Server: Apache
  Last-Modified: Sun, 31 May 2020 13:01:01 GMT
  Access-Control-Allow-Headers: Access-Control-Allow-Origin, Origin, X-Requested-With, Content-Type, Accept
  Access-Control-Allow-Methods: GET, OPTIONS, POST, PUT, DELETE
  Access-Control-Allow-Origin: *
  X-Powered-By: Servlet/2.5 JSP/2.1
  Access-Control-Max-Age: 3600
  X-Frame-Options: SAMEORIGIN
  Content-Type: text/html; charset=UTF-8
  Cache-Control: max-age=1448
  Expires: Sun, 31 May 2020 14:00:53 GMT
  Date: Sun, 31 May 2020 13:36:45 GMT
  Connection: keep-alive
  Vary: Accept-Encoding
Length: unspecified [text/html]
Remote file exists and could contain further links,
but recursion is disabled -- not retrieving.


hp-plugin[310176]: debug: wget returned: 0
[...] rest of error was the same.

But then I downloaded the file manually and got this...

-----------------------------------------
| PLUG-IN INSTALLATION FOR HPLIP 3.20.3 |
-----------------------------------------

  Option      Description                                       
  ----------  --------------------------------------------------
  d           Download plug-in from HP (recommended)            
  p           Specify a path to the plug-in (advanced)          
  q           Quit hp-plugin (skip installation)                

Enter option (d=download*, p=specify path, q=quit) ? p
Enter the path to the 'hplip-3.20.3-plugin.run' file (q=quit) : hplip-3.20.3-plugin.run

---------------
| COPY PLUGIN |
---------------

Downloading plug-in from: file:///home/users/jason/Downloads/hplip-3.20.3-plugin.run
Downloading plug-in: [\                                                                                                                                                                                                ] 0%     Traceback (most recent call last):
[...] rest of error the same.

That's the correct path, too.

UPDATE: I managed to get this to work, but this isn't really an "answer" or even really a "solution". I figured I'd see if the python debugger would tell me anything new so I ran hp-plugin from that, with the command pdb3 /usr/share/hplip/plugin.py -i -g, and, uh, it just plain worked. It still doesn't work without the debugger, but at least I was able to get my printer working again. I still cannot tell you what's wrong (and there's still something wrong here), but maybe more data will help.

I have upgraded my system from 19.10 to 20.04, everything is working correctly except I cannot load hp-systray or any other parts of the program.

The problem I have is pyqt4 available in 20.04 I have been unable to locate it.

Terminal error below:

HP Linux Imaging and Printing System (ver. 3.20.2)
System Tray Status Service ver. 2.0

Copyright (c) 2001-18 HP Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.

error: No module named 'PyQt4'
error: Unable to load Qt4/Qt5 support. Is it installed?

I also ran hp-check -r; output below:

rick@rick-M52BC-M32BC:~$ hp-check -r
Saving output in log file: /home/rick/hp-check.log

HP Linux Imaging and Printing System (ver. 3.20.2)
Dependency/Version Check Utility ver. 15.1

Copyright (c) 2001-18 HP Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.

Note: hp-check can be run in three modes:
1. Compile-time check mode (-c or --compile): Use this mode before compiling the
HPLIP supplied tarball (.tar.gz or .run) to determine if the proper dependencies
are installed to successfully compile HPLIP.                                    
2. Run-time check mode (-r or --run): Use this mode to determine if a distro    
supplied package (.deb, .rpm, etc) or an already built HPLIP supplied tarball   
has the proper dependencies installed to successfully run.                      
3. Both compile- and run-time check mode (-b or --both) (Default): This mode    
will check both of the above cases (both compile- and run-time dependencies).   

Check types:                                                                    
a. EXTERNALDEP - External Dependencies                                          
b. GENERALDEP - General Dependencies (required both at compile and run time)    
c. COMPILEDEP - Compile time Dependencies                                       
d. [All are run-time checks]                                                    
PYEXT SCANCONF QUEUES PERMISSION                                                

Status Types:
    OK
    MISSING       - Missing Dependency or Permission or Plug-in
    INCOMPAT      - Incompatible dependency-version or Plugin-version

warning: ubuntu-20.04 version is not supported. Using ubuntu-19.10 versions dependencies to verify and install...

---------------
| SYSTEM INFO |
---------------

 Kernel: 5.4.0-26-generic #30-Ubuntu SMP Mon Apr 20 16:58:30 UTC 2020 GNU/Linux
 Host: rick-M52BC-M32BC
 Proc: 5.4.0-26-generic #30-Ubuntu SMP Mon Apr 20 16:58:30 UTC 2020 GNU/Linux
 Distribution: ubuntu 20.04
 Bitness: 64 bit


-----------------------
| HPLIP CONFIGURATION |
-----------------------

HPLIP-Version: HPLIP 3.20.2
HPLIP-Home: /usr/share/hplip
warning: HPLIP-Installation: Auto installation is not supported for ubuntu distro  20.04 version 

Current contents of /etc/hp/hplip.conf file:

# hplip.conf.  Generated from hplip.conf.in by configure.

[hplip]
version=3.20.2

[dirs]
home=/usr/share/hplip
run=/var/run
ppd=/usr/share/ppd/hplip/HP
ppdbase=/usr/share/ppd/hplip
doc=/usr/share/doc/hplip-3.20.2
html=/usr/share/doc/hplip-3.20.2
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=3.20.2
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

Current contents of /var/lib/hp/hplip.state file:

Plugins are not installed. Could not access file: No such file or directory

Current contents of ~/.hplip/hplip.conf file:

[upgrade]
notify_upgrade = true
last_upgraded_time = 1582830956
pending_upgrade_time = 0
latest_available_version = 3.17.10

[settings]
systray_visible = 0
systray_messages = 0

[last_used]
device_uri = hpaio:/net/officejet_5200_series?ip=192.168.1.139&queue=false
printer_name = HP_OfficeJet_5200_series
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 = 04/27/20 18:23:19
version = 3.20.2


 <Package-name>        <Package-Desc>      <Required/Optional> <Min-Version> <Installed-Version> <Status>   <Comment>

-------------------------
| External Dependencies |
-------------------------

 error: cups          CUPS - Common Unix Printing System                           REQUIRED        1.1             -               INCOMPAT   'CUPS may not be installed or not running'
 gs                   GhostScript - PostScript and PDF language interpreter and previewer REQUIRED        7.05            9.50            OK         -
 xsane                xsane - Graphical scanner frontend for SANE                  OPTIONAL        0.9             0.999           OK         -
 scanimage            scanimage - Shell scanning program                           OPTIONAL        1.0             1.0.29          OK         -
 dbus                 DBus - Message bus system                                    REQUIRED        -               1.12.16         OK         -
 policykit            PolicyKit - Administrative policy framework                  OPTIONAL        -               0.105           OK         -
 network              network -wget                                                OPTIONAL        -               1.20.3          OK         -
 avahi-utils          avahi-utils                                                  OPTIONAL        -               0.7             OK         -

------------------------
| General Dependencies |
------------------------

 libjpeg              libjpeg - JPEG library                                       REQUIRED        -               -               OK         -
 cups-devel           CUPS devel- Common Unix Printing System development files    REQUIRED        -               -               OK         -
 cups-image           CUPS image - CUPS image development files                    REQUIRED        -               -               OK         -
 libpthread           libpthread - POSIX threads library                           REQUIRED        -               b'2.31'         OK         -
 libusb               libusb - USB library                                         REQUIRED        -               1.0             OK         -
 sane                 SANE - Scanning library                                      REQUIRED        -               -               OK         -
 sane-devel           SANE - Scanning library development files                    REQUIRED        -               -               OK         -
 libnetsnmp-devel     libnetsnmp-devel - SNMP networking library development files REQUIRED        5.0.9           5.8             OK         -
 libcrypto            libcrypto - OpenSSL cryptographic library                    REQUIRED        -               1.1.1           OK         -
 python3X             Python 2.2 or greater - Python programming language          REQUIRED        2.2             3.8.2           OK         -
 python3-notify2      Python libnotify - Python bindings for the libnotify Desktop notifications OPTIONAL        -               -               OK         -
 error: python3-pyqt4-dbus PyQt 4 DBus - DBus Support for PyQt4                         OPTIONAL        4.0             -               MISSING    'python3-pyqt4-dbus needs to be installed'
 error: python3-pyqt4 PyQt 4- Qt interface for Python (for Qt version 4.x)         REQUIRED        4.0             -               MISSING    'python3-pyqt4 needs to be installed'
 python3-dbus         Python DBus - Python bindings for DBus                       REQUIRED        0.80.0          1.2.16          OK         -
 python3-xml          Python XML libraries                                         REQUIRED        -               2.2.9           OK         -
 python3-devel        Python devel - Python development files                      REQUIRED        2.2             3.8.2           OK         -
 python3-pil          PIL - Python Imaging Library (required for commandline scanning with hp-scan) OPTIONAL        -               7.0.0           OK         -
 python3-reportlab    Reportlab - PDF library for Python                           OPTIONAL        2.0             3.5.34          OK         -

--------------
| COMPILEDEP |
--------------

 libtool              libtool - Library building support services                  REQUIRED        -               2.4.6           OK         -
 gcc                  gcc - GNU Project C and C++ Compiler                         REQUIRED        -               9.3.0           OK         -
 make                 make - GNU make utility to maintain groups of programs       REQUIRED        3.0             4.2.1           OK         -

---------------------
| Python Extentions |
---------------------

 cupsext              CUPS-Extension                                               REQUIRED        -               3.20.2          OK         -
 hpmudext             IO-Extension                                                 REQUIRED        -               3.20.2          OK         -

----------------------
| Scan Configuration |
----------------------

 hpaio                HPLIP-SANE-Backend                                           REQUIRED        -               3.20.2          OK         'hpaio found in /etc/sane.d/dll.conf'
 scanext              Scan-SANE-Extension                                          REQUIRED        -               3.20.2          OK         -

------------------------------
| DISCOVERED SCANNER DEVICES |
------------------------------

The device `hpaio:/usb/OfficeJet_5200_series?serial=TH9B5BD184` is a Hewlett-Packard OfficeJet_5200_series all-in-one


--------------------------
| DISCOVERED USB DEVICES |
--------------------------

  Device URI                      Model                   
  ------------------------------  ------------------------
  hp:/usb/OfficeJet_5200_series?  HP OfficeJet 5200 series
  serial=TH9B5BD184                                       

---------------------------------
| INSTALLED CUPS PRINTER QUEUES |
---------------------------------


HP_Fax_4
--------
Type: Fax
Device URI: hpfax:/usb/OfficeJet_5200_series?serial=TH9B5BD184
PPD: /etc/cups/ppd/HP_Fax_4.ppd
warning: Failed to read /etc/cups/ppd/HP_Fax_4.ppd ppd file
PPD Description: 
Printer status: printer HP_Fax_4 is idle.  enabled since Thu 27 Feb 2020 05:11:03 PM EST
Communication status: Good

HP_OfficeJet_5200_series
------------------------
Type: Unknown
Device URI: usb://HP/OfficeJet%205200%20series?serial=TH9B5BD184&interface=1
PPD: /etc/cups/ppd/HP_OfficeJet_5200_series.ppd
warning: Failed to read /etc/cups/ppd/HP_OfficeJet_5200_series.ppd ppd file
PPD Description: 
Printer status: printer HP_OfficeJet_5200_series is idle.  enabled since Mon 27 Apr 2020 05:22:39 PM EDT
warning: Printer is not HPLIP installed. Printers must use the hp: or hpfax: CUPS backend for HP-Devices.

HP_OfficeJet_5200_series_72D17F_3_
----------------------------------
Type: Unknown
Device URI: implicitclass://HP_OfficeJet_5200_series_72D17F_3_/
PPD: /etc/cups/ppd/HP_OfficeJet_5200_series_72D17F_3_.ppd
warning: Failed to read /etc/cups/ppd/HP_OfficeJet_5200_series_72D17F_3_.ppd ppd file
PPD Description: 
Printer status: printer HP_OfficeJet_5200_series_72D17F_3_ is idle.  enabled since Mon 27 Apr 2020 04:28:16 PM EDT
warning: Printer is not HPLIP installed. Printers must use the hp: or hpfax: CUPS backend for HP-Devices.

OfficeJet_5200_series_TH9B5BD184_
---------------------------------
Type: Unknown
Device URI: implicitclass://OfficeJet_5200_series_TH9B5BD184_/
PPD: /etc/cups/ppd/OfficeJet_5200_series_TH9B5BD184_.ppd
warning: Failed to read /etc/cups/ppd/OfficeJet_5200_series_TH9B5BD184_.ppd ppd file
PPD Description: 
Printer status: printer OfficeJet_5200_series_TH9B5BD184_ is idle.  enabled since Mon 27 Apr 2020 04:28:13 PM EDT
warning: Printer is not HPLIP installed. Printers must use the hp: or hpfax: CUPS backend for HP-Devices.


--------------
| PERMISSION |
--------------

USB             None                           Required        -        -        OK       Node:'/dev/bus/usb/001/004' Perm:'  root  lp rw- rw- rw- rw- r--'

-----------
| SUMMARY |
-----------

Missing Required Dependencies
-----------------------------
error: 'libcups2' package is missing/incompatible 
error: 'python3-pyqt4' package is missing/incompatible 
error: 'gtk2-engines-pixbuf' package is missing/incompatible 

Missing Optional Dependencies
-----------------------------
error: 'python3-dbus.mainloop.qt' package is missing/incompatible 

Total Errors: 3
Total Warnings: 3

I'm having issues detecting my printer (HP Deskjet 3630), OS Ubuntu 18.04. I've installed HPLIP and when I try to detect the printer via "Network/Ethernet" I get the following answer:

HPLIP cannot detect printers in your network.
This may be due to existing firewall settings blocking the required ports. When you are in a trusted network environment, you may open the ports for network services like mdns and slp in the firewall. For detailed steps follow the link.
http://hplipopensource.com/node/375

I disabled the firewall but that didn't help.

I tried to change "Network discovery method" to mDNS/Bonjour and Avahi and didn't help neither.

I have a HP 3630 all in one printer/scanner and it was working great on Ubuntu 16.04 with the HP Print manager. Now I did a clean and fresh install Ubuntu 18.04 and the printing work fine, but example Sane (or other scan software) can't find the device.

I have installed hplip 3.18.4 that I found on the HP website, but still nothing. Even to add a printer in the HP manager didn't work. In the WiFi I tried the WIFI-direct to connect with the printer and that works fine also, but the scan is not seen.

What to do to make scanning work on Ubuntu 18.04?