Impresora hplaserjet Pro MFP M127fn se queda en "imprimiendo documento"

Luego de instalar HPLIP 3.30.6 en ubuntu 1804 la impresora no imprime, la pantalla solo muestra el mensaje "imprimiendo documento". El registro hp-check arroja "no errors or warnings". Al ejecutar hp-doctor, lo unico que muestra de raro al final es:

Checking for HP Properitery Plugin's....
No plug-in printers are configured.
++++++++++++++++++++++++++++++++++++

Este es el registro de hp-check:

hernan@hernan:~$ hp-check
Saving output in log file: /home/hernan/hp-check.log

HP Linux Imaging and Printing System (ver. 3.20.6)
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

|Gtk-Message: 14:56:47.481: Failed to load module "canberra-gtk-module"
/Gtk-Message: 14:56:47.511: Failed to load module "canberra-gtk-module"

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

 Kernel: 4.15.0-109-generic #110-Ubuntu SMP Tue Jun 23 02:39:32 UTC 2020 GNU/Linux
 Host: hernan
 Proc: 4.15.0-109-generic #110-Ubuntu SMP Tue Jun 23 02:39:32 UTC 2020 GNU/Linux
 Distribution: 12 18.04
 Bitness: 64 bit

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

HPLIP-Version: HPLIP 3.20.6
HPLIP-Home: /usr/share/hplip
HPLIP-Installation: Auto installation is supported for ubuntu distro 18.04 version

Current contents of '/etc/hp/hplip.conf' file:
# hplip.conf. Generated from hplip.conf.in by configure.

[hplip]
version=3.20.6

[dirs]
home=/usr/share/hplip
run=/var/run
ppd=/usr/share/ppd/HP
ppdbase=/usr/share/ppd
doc=/usr/share/doc/hplip-3.20.6
html=/usr/share/doc/hplip-3.20.6
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=3.20.6
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

Current contents of '/var/lib/hp/hplip.state' file:
[plugin]
installed = 1
eula = 1
version = 3.17.10

Current contents of '~/.hplip/hplip.conf' file:
[upgrade]
notify_upgrade = true
last_upgraded_time = 1594402979
pending_upgrade_time = 0
latest_available_version = 3.17.10

[installation]
date_time = 17/07/20 14:56:48
version = 3.20.6

[settings]
systray_visible = 0
systray_messages = 0

[last_used]
device_uri = "hp:/usb/HP_LaserJet_Pro_MFP_M127fn?serial=CNB9H23HX9"
printer_name = HP_LaserJet_Pro_MFP_M127fn
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 =

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

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

 gcc gcc - GNU Project C and C++ Compiler REQUIRED - 7.5.0 OK -
 make make - GNU make utility to maintain groups of programs REQUIRED 3.0 4.1 OK -
 libtool libtool - Library building support services REQUIRED - 2.4.6 OK -

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

 libcrypto libcrypto - OpenSSL cryptographic library REQUIRED - 1.1.1 OK -
 python-xml Python XML libraries REQUIRED - 2.2.5 OK -
 libnetsnmp-devel libnetsnmp-devel - SNMP networking library development files REQUIRED 5.0.9 5.7.3 OK -
 sane-devel SANE - Scanning library development files REQUIRED - - OK -
 pil PIL - Python Imaging Library (required for commandline scanning with hp-scan) OPTIONAL - 5.1.0 OK -
 pyqt4-dbus PyQt 4 DBus - DBus Support for PyQt4 REQUIRED 4.0 4.12.1 OK -
 libpthread libpthread - POSIX threads library REQUIRED - 2.27 OK -
 python-devel Python devel - Python development files REQUIRED 2.2 2.7.17 OK -
 cups-devel CUPS devel- Common Unix Printing System development files REQUIRED - 2.2.7 OK -
 python-dbus Python DBus - Python bindings for DBus REQUIRED 0.80.0 1.2.6 OK -
 cups-ddk CUPS DDK - CUPS driver development kit OPTIONAL - - OK -
 reportlab Reportlab - PDF library for Python OPTIONAL 2.0 3.4.0 OK -
 pyqt4 PyQt 4- Qt interface for Python (for Qt version 4.x) REQUIRED 4.0 4.12.1 OK -
 libusb libusb - USB library REQUIRED - 1.0 OK -
 cups-image CUPS image - CUPS image development files REQUIRED - 2.2.7 OK -
 python2X Python 2.2 or greater - Python programming language REQUIRED 2.2 2.7.17 OK -
 python-notify Python libnotify - Python bindings for the libnotify Desktop notifications OPTIONAL - - OK -
 libjpeg libjpeg - JPEG library REQUIRED - - OK -
 sane SANE - Scanning library REQUIRED - - OK -

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

 scanext Scan-SANE-Extension REQUIRED - 3.20.6 OK -
 hpaio HPLIP-SANE-Backend REQUIRED - 3.20.6 OK 'hpaio found in /etc/sane.d/dll.conf'

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

 gs GhostScript - PostScript and PDF language interpreter and previewer REQUIRED 7.05 9.26 OK -
 scanimage scanimage - Shell scanning program OPTIONAL 1.0 1.0.27 OK -
 cups CUPS - Common Unix Printing System REQUIRED 1.1 2.2.7 OK 'CUPS Scheduler is running'
 network network -wget OPTIONAL - 1.19.4 OK -
 policykit PolicyKit - Administrative policy framework OPTIONAL - 0.105 OK -
Gtk-Message: 14:56:52.051: Failed to load module "canberra-gtk-module"
Gtk-Message: 14:56:52.081: Failed to load module "canberra-gtk-module"
 xsane xsane - Graphical scanner frontend for SANE OPTIONAL 0.9 0.999 OK -
 dbus DBus - Message bus system REQUIRED - 1.12.2 OK -
 avahi-utils avahi-utils OPTIONAL - 0.7 OK -

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

 hpmudext IO-Extension REQUIRED - 3.20.6 OK -
 cupsext CUPS-Extension REQUIRED - 3.20.6 OK -

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

device `hpaio:/usb/HP_LaserJet_Pro_MFP_M127fn?serial=CNB9H23HX9' is a Hewlett-Packard HP_LaserJet_Pro_MFP_M127fn all-in-one

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

  Device URI Model
  -------------------------------- --------------------------
  hp:/usb/HP_LaserJet_Pro_MFP_M127 HP LaserJet Pro MFP M127fn
  fn?serial=CNB9H23HX9

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

HP_LaserJet_Pro_MFP_M127fn
--------------------------
Type: Printer
Device URI: hp:/usb/HP_LaserJet_Pro_MFP_M127fn?serial=CNB9H23HX9
PPD: /etc/cups/ppd/HP_LaserJet_Pro_MFP_M127fn.ppd
PPD Description: HP LaserJet Pro MFP m127fn, hpcups 3.20.6
Printer status: la impresora HP_LaserJet_Pro_MFP_M127fn está ahora imprimiendo HP_LaserJProcessing page 1.... activada desde vie 17 jul 2020 14:56:05 -05
Communication status: Good

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

USB HP_LaserJet_Pro_MFP_M127fn Required - - OK Node:'/dev/bus/usb/001/009' Perm:' root lp rw- rw- rw- rw- r--'
No errors or warnings.

Done.
hernan@hernan:~$
+++++++++++++++++++++++++++++++++++++

Y este el el registro de hp-doctor:

hernan@hernan:~$ hp-doctor

HP Linux Imaging and Printing System (ver. 3.20.6)
Self Diagnse Utility and Healing Utility ver. 1.0

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.

HP Linux Imaging and Printing System (ver. 3.20.6)
Self Diagnse Utility and Healing Utility ver. 1.0

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.

|Gtk-Message: 14:59:43.072: Failed to load module "canberra-gtk-module"
/Gtk-Message: 14:59:43.110: Failed to load module "canberra-gtk-module"

Checking for Deprecated items....
No Deprecated items are found

Checking for HPLIP updates....

HP Linux Imaging and Printing System (ver. 3.20.6)
HPLIP upgrade latest version ver. 1.0

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.

Latest version of HPLIP is already installed.

Checking for Dependencies....

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

 Kernel: 4.15.0-109-generic #110-Ubuntu SMP Tue Jun 23 02:39:32 UTC 2020 GNU/Linux
 Host: hernan
 Proc: 4.15.0-109-generic #110-Ubuntu SMP Tue Jun 23 02:39:32 UTC 2020 GNU/Linux
 Distribution: 12 18.04
 Bitness: 64 bit

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

HPLIP-Version: HPLIP 3.20.6
HPLIP-Home: /usr/share/hplip
HPLIP-Installation: Auto installation is supported for ubuntu distro 18.04 version

Current contents of '/etc/hp/hplip.conf' file:
# hplip.conf. Generated from hplip.conf.in by configure.

[hplip]
version=3.20.6

[dirs]
home=/usr/share/hplip
run=/var/run
ppd=/usr/share/ppd/HP
ppdbase=/usr/share/ppd
doc=/usr/share/doc/hplip-3.20.6
html=/usr/share/doc/hplip-3.20.6
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=3.20.6
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

Current contents of '/var/lib/hp/hplip.state' file:
[plugin]
installed = 1
eula = 1
version = 3.17.10

Current contents of '~/.hplip/hplip.conf' file:
[upgrade]
notify_upgrade = true
last_upgraded_time = 1594402979
pending_upgrade_time = 0
latest_available_version = 3.17.10

[installation]
date_time = 17/07/20 14:59:44
version = 3.20.6

[settings]
systray_visible = 0
systray_messages = 0

[last_used]
device_uri = "hp:/usb/HP_LaserJet_Pro_MFP_M127fn?serial=CNB9H23HX9"
printer_name = HP_LaserJet_Pro_MFP_M127fn
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 =

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

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

 gcc gcc - GNU Project C and C++ Compiler REQUIRED - 7.5.0 OK -
 make make - GNU make utility to maintain groups of programs REQUIRED 3.0 4.1 OK -
 libtool libtool - Library building support services REQUIRED - 2.4.6 OK -

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

 libcrypto libcrypto - OpenSSL cryptographic library REQUIRED - 1.1.1 OK -
 python-xml Python XML libraries REQUIRED - 2.2.5 OK -
 libnetsnmp-devel libnetsnmp-devel - SNMP networking library development files REQUIRED 5.0.9 5.7.3 OK -
 sane-devel SANE - Scanning library development files REQUIRED - - OK -
 pil PIL - Python Imaging Library (required for commandline scanning with hp-scan) OPTIONAL - 5.1.0 OK -
 pyqt4-dbus PyQt 4 DBus - DBus Support for PyQt4 REQUIRED 4.0 4.12.1 OK -
 libpthread libpthread - POSIX threads library REQUIRED - 2.27 OK -
 python-devel Python devel - Python development files REQUIRED 2.2 2.7.17 OK -
 cups-devel CUPS devel- Common Unix Printing System development files REQUIRED - 2.2.7 OK -
 python-dbus Python DBus - Python bindings for DBus REQUIRED 0.80.0 1.2.6 OK -
 cups-ddk CUPS DDK - CUPS driver development kit OPTIONAL - - OK -
 reportlab Reportlab - PDF library for Python OPTIONAL 2.0 3.4.0 OK -
 pyqt4 PyQt 4- Qt interface for Python (for Qt version 4.x) REQUIRED 4.0 4.12.1 OK -
 libusb libusb - USB library REQUIRED - 1.0 OK -
 cups-image CUPS image - CUPS image development files REQUIRED - 2.2.7 OK -
 python2X Python 2.2 or greater - Python programming language REQUIRED 2.2 2.7.17 OK -
 python-notify Python libnotify - Python bindings for the libnotify Desktop notifications OPTIONAL - - OK -
 libjpeg libjpeg - JPEG library REQUIRED - - OK -
 sane SANE - Scanning library REQUIRED - - OK -

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

 scanext Scan-SANE-Extension REQUIRED - 3.20.6 OK -
 hpaio HPLIP-SANE-Backend REQUIRED - 3.20.6 OK 'hpaio found in /etc/sane.d/dll.conf'

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

 gs GhostScript - PostScript and PDF language interpreter and previewer REQUIRED 7.05 9.26 OK -
 scanimage scanimage - Shell scanning program OPTIONAL 1.0 1.0.27 OK -
 cups CUPS - Common Unix Printing System REQUIRED 1.1 2.2.7 OK 'CUPS Scheduler is running'
 network network -wget OPTIONAL - 1.19.4 OK -
 policykit PolicyKit - Administrative policy framework OPTIONAL - 0.105 OK -
Gtk-Message: 14:59:56.987: Failed to load module "canberra-gtk-module"
Gtk-Message: 14:59:57.021: Failed to load module "canberra-gtk-module"
 xsane xsane - Graphical scanner frontend for SANE OPTIONAL 0.9 0.999 OK -
 dbus DBus - Message bus system REQUIRED - 1.12.2 OK -
 avahi-utils avahi-utils OPTIONAL - 0.7 OK -

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

 hpmudext IO-Extension REQUIRED - 3.20.6 OK -
 cupsext CUPS-Extension REQUIRED - 3.20.6 OK -

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

device `hpaio:/usb/HP_LaserJet_Pro_MFP_M127fn?serial=CNB9H23HX9' is a Hewlett-Packard HP_LaserJet_Pro_MFP_M127fn all-in-one

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

  Device URI Model
  -------------------------------- --------------------------
  hp:/usb/HP_LaserJet_Pro_MFP_M127 HP LaserJet Pro MFP M127fn
  fn?serial=CNB9H23HX9

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

HP_LaserJet_Pro_MFP_M127fn
--------------------------
Type: Printer
Device URI: hp:/usb/HP_LaserJet_Pro_MFP_M127fn?serial=CNB9H23HX9
PPD: /etc/cups/ppd/HP_LaserJet_Pro_MFP_M127fn.ppd
PPD Description: HP LaserJet Pro MFP m127fn, hpcups 3.20.6
Printer status: la impresora HP_LaserJet_Pro_MFP_M127fn está ahora imprimiendo HP_LaserJProcessing page 1.... activada desde vie 17 jul 2020 14:56:05 -05
Communication status: Good

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

USB HP_LaserJet_Pro_MFP_M127fn Required - - OK Node:'/dev/bus/usb/001/009' Perm:' root lp rw- rw- rw- rw- r--'

Checking for Configured Queues....

Queue(s) configured correctly using HPLIP.

Checking for HP Properitery Plugin's....
No plug-in printers are configured.

Diagnose completed...

More information on Troubleshooting,How-To's and Support is available on http://hplipopensource.com/hplip-web/index.html
hernan@hernan:~$

Les agradezco su ayuda.