Scan does not work with hplip 3.20.3 on Ubuntu 20.4

[Paul Cohen]

I recently upgraded to Ubuntu 20.4.1 from 18.04. I have a HP M277dw wireless printer.

Printing works but scanning does not work.

I have hplip 3.20.3 installed.

When I run simplescan the scanner is found and can be selected, but when I try to scan, a dialog comes up with the text: "Failed to scan unable to start scan" is shown.

xsane also lists the scanner, but when I try to scan, an Error dialog comes up with the text: "Failed to start scanner: Error during device I/O".

hp-check reports:

* warning: ubuntu-20.04 version is not supported. Using ubuntu-19.10 versions dependencies to verify and install
* warning: HPLIP-Installation: Auto installation is not supported for ubuntu distro 20.04 version

which is not comforting. The full outpur from hp-check below.

$ hp-check
Saving output in log file: /home/paco/hp-check.log

HP Linux Imaging and Printing System (ver. 3.20.3)
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: 5.4.0-42-generic #46-Ubuntu SMP Fri Jul 10 00:24:02 UTC 2020 GNU/Linux
 Host: shannon
 Proc: 5.4.0-42-generic #46-Ubuntu SMP Fri Jul 10 00:24:02 UTC 2020 GNU/Linux
 Distribution: ubuntu 20.04
 Bitness: 64 bit

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

HPLIP-Version: HPLIP 3.20.3
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=3.20.3

[dirs]
home=/usr/share/hplip
run=/var/run
ppd=/usr/share/ppd/hplip/HP
ppdbase=/usr/share/ppd/hplip
doc=/usr/share/doc/hplip
html=/usr/share/doc/hplip-doc
icon=no
cupsbackend=/usr/lib/cups/backend
cupsfilter=/usr/lib/cups/filter
drv=/usr/share/cups/drv
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=yes
foomatic-drv-install=yes
foomatic-ppd-install=no
foomatic-rip-hplip-install=no
hpcups-install=yes
cups-drv-install=yes
cups-ppd-install=no
internal-tag=3.20.3
restricted-build=no
ui-toolkit=qt5
qt3=no
qt4=no
qt5=yes
policy-kit=yes
lite-build=no
udev_sysfs_rules=no
hpcups-only-build=no
hpijs-only-build=no
apparmor_build=no
class-driver=no

Current contents of '/var/lib/hp/hplip.state' file:
[plugin]
installed = 1
eula = 1
version = 3.20.3

Current contents of '~/.hplip/hplip.conf' file:
[commands]
scan = /usr/bin/simple-scan %SANE_URI%

[fax]
email_address =
voice_phone =

[installation]
date_time = 08/03/20 14:23:09
version = 3.20.3

[last_used]
device_uri = "hp:/net/HP_Color_LaserJet_MFP_M277dw?ip=192.168.1.22"
printer_name =
working_dir = .

[polling]
device_list =
enable = false
interval = 5

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

[settings]
systray_messages = 0
systray_visible = 0

[upgrade]
last_upgraded_time = 1595243553
latest_available_version = 3.17.10
notify_upgrade = true
pending_upgrade_time = 0

 <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 - 3.20.3 OK -
 hpmudext IO-Extension REQUIRED - 3.20.3 OK -

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

'/etc/sane.d/dll.d/hpaio' not found.
 hpaio HPLIP-SANE-Backend REQUIRED - 3.20.3 OK 'hpaio found in /etc/sane.d/dll.conf'
 scanext Scan-SANE-Extension REQUIRED - 3.20.3 OK -

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

device `escl:http://fe80::aa6b:adff:fe58:d094:8080' is a ESCL HP Color LaserJet MFP M277dw (9F652B) flatbed scanner
device `hpaio:/net/HP_Color_LaserJet_MFP_M277dw?ip=192.168.1.22' is a Hewlett-Packard HP_Color_LaserJet_MFP_M277dw all-in-one
device `escl:http://fe80::aa6b:adff:fe58:d094:8080' is a ESCL HP Color LaserJet MFP M277dw (9F652B) flatbed scanner
device `hpaio:/net/HP_Color_LaserJet_MFP_M277dw?ip=192.168.1.22' is a Hewlett-Packard HP_Color_LaserJet_MFP_M277dw all-in-one

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

No devices found.

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

HP_Color_LaserJet_MFP_M277dw
----------------------------
Type: Printer
Device URI: hp:/net/HP_Color_LaserJet_MFP_M277dw?ip=192.168.1.22
PPD: /etc/cups/ppd/HP_Color_LaserJet_MFP_M277dw.ppd
warning: Failed to read /etc/cups/ppd/HP_Color_LaserJet_MFP_M277dw.ppd ppd file
PPD Description:
Printer status: printer HP_Color_LaserJet_MFP_M277dw is idle. enabled since mån 3 aug 2020 13:32:41
Required plug-in status: Installed
Communication status: Good

HP_Color_LaserJet_MFP_M277dw_9F652B_
------------------------------------
Type: Unknown
Device URI: implicitclass://HP_Color_LaserJet_MFP_M277dw_9F652B_/
PPD: /etc/cups/ppd/HP_Color_LaserJet_MFP_M277dw_9F652B_.ppd
warning: Failed to read /etc/cups/ppd/HP_Color_LaserJet_MFP_M277dw_9F652B_.ppd ppd file
PPD Description:
Printer status: printer HP_Color_LaserJet_MFP_M277dw_9F652B_ is idle. enabled since mån 3 aug 2020 13:30:22
warning: Printer is not HPLIP installed. Printers must use the hp: or hpfax: CUPS backend for HP-Devices.

HP_Color_LaserJet_MFP_M277dw_fax
--------------------------------
Type: Fax
Device URI: hpfax:/net/HP_Color_LaserJet_MFP_M277dw?ip=192.168.1.22
PPD: /etc/cups/ppd/HP_Color_LaserJet_MFP_M277dw_fax.ppd
warning: Failed to read /etc/cups/ppd/HP_Color_LaserJet_MFP_M277dw_fax.ppd ppd file
PPD Description:
Printer status: printer HP_Color_LaserJet_MFP_M277dw_fax is idle. enabled since mån 3 aug 2020 13:10:34
Required plug-in status: Installed
Communication status: Good

<email address hidden>
-----------------------------------------
Type: Unknown
Device URI: ipps://PRN0001.local:443/ipp/print

<email address hidden>
--------------------------------------------
Type: Unknown
Device URI: ipps://PRN0003.local:443/ipp/print
PPD: /<email address hidden>
warning: Failed to read /<email address hidden> ppd file
PPD Description:
Printer status: printer <email address hidden> is idle. enabled since tor 21 nov 2019 12:00:15
warning: Printer is not HPLIP installed. Printers must use the hp: or hpfax: CUPS backend for HP-Devices.

<email address hidden>
--------------------------------------------
Type: Unknown
Device URI: ipps://PRN0002.local:443/ipp/print

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

-----------
| 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: 2

Done.

[Valentijn Sessink (valentijn)]

I had the same error. According to https://forum.ubuntuusers.de/topic/hp-laserjet-pro-mfp-m277dw-druckt-scannen-geht/ a redownload of the plugin could help: "hp-plugin -i". Does that work?

[Valentijn Sessink (valentijn)]

For me, it did.

[Paul Cohen (pacoispaco)]

I solved my problem by downloading hplip-3.20.9 and not installing the GUI (which requires the Python 2 lib python-pyqt5) or the Fax functionality (which requires Python 2 lib python-reportlabs). I installed hplip-3.20.9 and then after that the plugin hplip-3.20.9-plugin. Now my scanner works.

[zdohnal (zdohnal)]

HP M277dw is still marked in models.dat as it doesn't need a plugin. It is the same for version 3.20.11. I believe the issue shouldn't be closed till the proper fix is applied.

Shivani,

would you mind fixing models.dat to reflect findings of this bug? Or you can just revert the change made in 3.20.6 as suggested in #1883898.

[Antonio Giménez (antanins)]

This worked for me:
https://askubuntu.com/questions/1245010/hplip-driver-install-fails-on-ubuntu-20-04

[Don Levin (dlevin)]

I have same problem, Ubuntu 20, HP M277dw wireless printer which worked prior to 20. The USB board in printer is damaged and wireless is only option. I tried installing hplip but where it asks USB, or wireless I picked wireless but it asks to temporarily connect by USB which I can't do. I can print test pages and using printer front panel connect it to my home WiFi, and from Ubuntu I can print a test page. How can I finish installing hplip?

[^rooker (rooker)]

I also have a problem with the HP M277dw on Xubuntu 20.04 on a friend's computer.

I will try the `pdb3 /usr/share/hplip/plugin.py -i -g` workaround mentioned in [the link](https://askubuntu.com/questions/1245010/hplip-driver-install-fails-on-ubuntu-20-04) @Antonio Giménez posted above. Will post the results when I get back to that machine.

Is there anything we can help to get a fix upstream?

Thanks!