printer works but not scanner on Ubuntu

[Rosalinda Oro]

I have an HP Laserjet Pro MFPM26nw printer-scanner, which I am trying to set up on Ubuntu 18.04.4.  I downloaded and installed hplip 3.20.6.  Now, the printer works, but not the scanner.  If I try to run it, a window pops up telling me to run hp-plugin.  But this also seems to fail. There were a couple of warnings during the install about "hcengine" and "canberra-gtk-module".

I have had the same problem with a couple of recent Linux installs.  Both printer and scanner work fine using my old computer running Ubuntu 14.04.

Here is the hp-check output

rosalinda@rosalinda-PN60-R:~$ hp-check
Saving output in log file: /home/rosalinda/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

-
(xsane:5639): Gtk-WARNING **: 14:30:17.292: Unable to locate theme engine in module_path: "hcengine",
Gtk-Message: 14:30:17.293: Failed to load module "canberra-gtk-module"

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

 Kernel: 5.3.0-62-generic #56~18.04.1-Ubuntu SMP Wed Jun 24 16:17:03 UTC 2020 GNU/Linux
 Host: rosalinda-PN60-R
 Proc: 5.3.0-62-generic #56~18.04.1-Ubuntu SMP Wed Jun 24 16:17:03 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:
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 = 1594480045
pending_upgrade_time = 0
latest_available_version = 3.17.10

[installation]
date_time = 07/11/20 14:30:18
version = 3.20.6

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

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

 cups CUPS - Common Unix Printing System REQUIRED 1.1 2.2.7 OK 'CUPS Scheduler is running'
 gs GhostScript - PostScript and PDF language interpreter and previewer REQUIRED 7.05 9.26 OK -

(xsane:5749): Gtk-WARNING **: 14:30:19.210: Unable to locate theme engine in module_path: "hcengine",
Gtk-Message: 14:30:19.211: Failed to load module "canberra-gtk-module"

(xsane:5750): Gtk-WARNING **: 14:30:19.229: Unable to locate theme engine in module_path: "hcengine",
Gtk-Message: 14:30:19.230: Failed to load module "canberra-gtk-module"
 xsane xsane - Graphical scanner frontend for SANE OPTIONAL 0.9 0.999 OK -
 scanimage scanimage - Shell scanning program OPTIONAL 1.0 1.0.27 OK -
 dbus DBus - Message bus system REQUIRED - 1.12.2 OK -
 policykit PolicyKit - Administrative policy framework OPTIONAL - 0.105 OK -
 network network -wget OPTIONAL - 1.19.4 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 - 2.2.7 OK -
 cups-image CUPS image - CUPS image development files REQUIRED - 2.2.7 OK -
 libpthread libpthread - POSIX threads library REQUIRED - b'2.27' 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 5.7.3 OK -
 libcrypto libcrypto - OpenSSL cryptographic library REQUIRED - 1.1.1 OK -
 python3X Python 2.2 or greater - Python programming language REQUIRED 2.2 3.6.9 OK -
 python3-notify2 Python libnotify - Python bindings for the libnotify Desktop notifications OPTIONAL - - OK -
 python3-pyqt4-dbus PyQt 4 DBus - DBus Support for PyQt4 OPTIONAL 4.0 4.12.1 OK -
 python3-pyqt4 PyQt 4- Qt interface for Python (for Qt version 4.x) REQUIRED 4.0 4.12.1 OK -
 python3-dbus Python DBus - Python bindings for DBus REQUIRED 0.80.0 1.2.6 OK -
 python3-xml Python XML libraries REQUIRED - 2.2.5 OK -
 python3-devel Python devel - Python development files REQUIRED 2.2 3.6.9 OK -
 python3-pil PIL - Python Imaging Library (required for commandline scanning with hp-scan) OPTIONAL - 7.2.0 OK -
 python3-reportlab Reportlab - PDF library for Python OPTIONAL 2.0 3.4.0 OK -

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

 libtool libtool - Library building support services REQUIRED - 2.4.6 OK -
 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 -

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

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

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

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

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

device `hpaio:/usb/HP_LaserJet_Pro_MFP_M26nw?serial=CNBKK7R351' is a Hewlett-Packard HP_LaserJet_Pro_MFP_M26nw all-in-one

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

  Device URI Model
  -------------------------------- -------------------------
  hp:/usb/HP_LaserJet_Pro_MFP_M26n HP LaserJet Pro MFP M26nw
  w?serial=CNBKK7R351

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

HP-LaserJet-Pro-MFP-M26nw
-------------------------
Type: Printer
Device URI: hp:/usb/HP_LaserJet_Pro_MFP_M26nw?serial=CNBKK7R351
PPD: /etc/cups/ppd/HP-LaserJet-Pro-MFP-M26nw.ppd
warning: Failed to read /etc/cups/ppd/HP-LaserJet-Pro-MFP-M26nw.ppd ppd file
PPD Description:
Printer status: printer HP-LaserJet-Pro-MFP-M26nw is idle. enabled since Sat 11 Jul 2020 10:23:25 AM EDT
Communication status: Good

HP_LaserJet_Pro_MFP_M26nw
-------------------------
Type: Printer
Device URI: hp:/usb/HP_LaserJet_Pro_MFP_M26nw?serial=CNBKK7R351
PPD: /etc/cups/ppd/HP_LaserJet_Pro_MFP_M26nw.ppd
warning: Failed to read /etc/cups/ppd/HP_LaserJet_Pro_MFP_M26nw.ppd ppd file
PPD Description:
Printer status: printer HP_LaserJet_Pro_MFP_M26nw is idle. enabled since Sat 11 Jul 2020 02:27:12 PM EDT
Communication status: Good

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

USB HP-LaserJet-Pro-MFP-M26nw Required - - OK Node:'/dev/bus/usb/001/005' Perm:' root lp rw- rw- rw- rw- r--'
No errors or warnings.

Done.

[shivani mandora (shivani1708)]

Hi ,

Can you please install plugin using sh command:

$sh hplip-3.20.6.plugin.run

Please try this command and try to scan. Please let me know if you face any issue

And also a couple of warnings during the install about "hcengine" and "canberra-gtk-module" does not affect the print and scan functionality.

[zdohnal (zdohnal)]

Shivani,

this bug is one of the cases I mentioned in my last comment at https://bugs.launchpad.net/hplip/+bug/1883898 - 'some devices had plugin=0 set, but they needed a plugin anyway'.

It seems testing of the device wasn't done on clean OS - meaning there was a lingering plugin in OS, which was loaded correctly during testing, but a tester didn't know about it...

[Rosalinda Oro (rosalinda)]

Hi, Shivani

Thanks for your reply. However, it does not work. Here is the output

rosalinda@rosalinda-PN60-R:~$ sh hplip-3.20.6.plugin.run
sh: 0: Can't open hplip-3.20.6.plugin.run

I also tried it with sudo. I also tried sh hp-plugin, but same result. I
tried running hp-plugin again without the sh, but it still fails. It says:

Plugin installation failed
error: Python gobject/dbus may be not installed
error: Plug-in install failed.

Do I need to install something? I have tried before, but never could find
the right package.

On Mon, Jul 13, 2020 at 2:50 AM shivani mandora <email address hidden>
wrote:

> Hi ,
>
> Can you please install plugin using sh command:
>
> $sh hplip-3.20.6.plugin.run
>
> Please try this command and try to scan. Please let me know if you face
> any issue
>
> And also a couple of warnings during the install about "hcengine" and
> "canberra-gtk-module" does not affect the print and scan functionality.
>
> ** Changed in: hplip
> Status: New => In Progress
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1887245
>
> Title:
> printer works but not scanner on Ubuntu
>
> Status in HPLIP:
> In Progress
>
> Bug description:
> I have an HP Laserjet Pro MFPM26nw printer-scanner, which I am trying
> to set up on Ubuntu 18.04.4. I downloaded and installed hplip 3.20.6.
> Now, the printer works, but not the scanner. If I try to run it, a
> window pops up telling me to run hp-plugin. But this also seems to
> fail. There were a couple of warnings during the install about
> "hcengine" and "canberra-gtk-module".
>
> I have had the same problem with a couple of recent Linux installs.
> Both printer and scanner work fine using my old computer running
> Ubuntu 14.04.
>
> Here is the hp-check output
>
>
> rosalinda@rosalinda-PN60-R:~$ hp-check
> Saving output in log file: /home/rosalinda/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 ch...