unable to delete and reinstall the driver

Hi Arpad,

Please install the latest version of HPLIP 3.14.6 release. When it prompt that older version of hplip was already installed. Hit enter button and continue with the installation. It will remove the older version of HPLIP and install the latest version for you.

Let us know if the problem still persists.

Thanks and Regards,
Srikanth Lokare

Hi Srikanth,

Thank you , for your answer. I've just did what you suggested, however when asking for the version the same old version comes up, and the software doesn't detect the printer through Wi-fi. Perhaps I should try with USB cable to connect it?

arpad@arpad-P170EM:~/HP$ sh hplip-3.14.6.run
Creating directory hplip-3.14.6
Verifying archive integrity... All good.
Uncompressing HPLIP 3.14.6 Self Extracting Archive..

arpad@arpad-P170EM:~/HP$ dpkg -l hplip
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-==============-============-============-=================================
rc hplip 3.14.3-0ubun amd64 HP Linux Printing and Imaging Sys
arpad@arpad-P170EM:~/HP$
HP Linux Imaging and Printing System (ver. 3.14.6)
HP Device Manager ver. 15.0

Copyright (c) 2001-13 Hewlett-Packard 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.

Hi,

Can you please post the output of 'hp-check' command here.

Thanks and Regards,
Srikanth Lokare

Hi, here is the post, in the meantime the xubuntu recognised the printer when I entered manually the IP address, I haven't tried with a printing or scaning yet, though.

arpad@arpad-P170EM:~$ hp-check
Saving output in log file: /home/arpad/hp-check.log

HP Linux Imaging and Printing System (ver. 3.14.6)
Dependency/Version Check Utility ver. 15.1

Copyright (c) 2001-13 Hewlett-Packard 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

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

 Kernel: 3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:08 UTC 2014 GNU/Linux
 Host: arpad-P170EM
 Proc: 3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:08 UTC 2014 GNU/Linux
 Distribution: ubuntu 14.04
 Bitness: 64 bit

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

HPLIP-Version: HPLIP 3.14.6
HPLIP-Home: /usr/share/hplip
HPLIP-Installation: Auto installation is supported for ubuntu distro 14.04 version

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

[hplip]
version=3.14.6

[dirs]
home=/usr/share/hplip
run=/var/run
ppd=/usr/share/ppd/HP
ppdbase=/usr/share/ppd
doc=/usr/share/doc/hplip-3.14.6
html=/usr/share/doc/hplip-3.14.6
icon=/usr/share/applications
cupsbackend=/usr/lib/cups/backend
cupsfilter=/usr/lib/cups/filter
drv=/usr/share/cups/drv/hp
bin=/usr/bin

# 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=3.14.6
restricted-build=no
ui-toolkit=qt4
qt3=no
qt4=yes
policy-kit=no
lite-build=no
udev_sysfs_rules=no
hpcups-only-build=no
hpijs-only-build=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:
[installation]
date_time = 22/07/14 12:22:50
version = 3.14.6

[upgrade]
notify_upgrade = true
last_upgraded_time = 1405976270
pending_upgrade_time = 0
latest_available_version = 3.14.6

[last_used]
device_uri = "hp:/net/ENVY_4500_series?ip=192.168.1.162"
printer_name =
working_dir = .

[settings]
systray_visible = 0
systray_messages = 0

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

[refresh]
rate = 30
enable = true
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>

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

 policykit Admin-Policy-framework OPTIONAL - 0.105 OK -
 gs Ghostscript REQUIRED 7.05 9.10 OK -
 network Network-wget OPTIONAL - 1.15 OK -
 scanimage Shell-Scanning OPTIONAL 1.0 1.0.23 OK -
 avahi-utils avahi-utils OPTIONAL - 0.6.31 OK -
 dbus DBus REQUIRED - 1.6.18 OK -
 cups CUPS REQUIRED 1.1 1.7.2 OK 'CUPS Scheduler is running'
 xsane SANE-GUI OPTIONAL 0.9 0.998 OK -

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

 reportlab Python-PDF-Lib OPTIONAL 2.0 3.0 OK -
 libcrypto OpenSSL-Crypto-Lib REQUIRED - 1.0.1 OK -
 pil Python-Image-Lib OPTIONAL - 1.1.7 OK -
 pyqt4-dbus PyQt4-DBUS REQUIRED 4.0 4.10.4 OK -
 libjpeg JPEG-Lib REQUIRED - - OK -
 libpthread POSIX-Threads-Lib REQUIRED - 2.19 OK -
 python-dbus Python-DBUS REQUIRED 0.80.0 1.2.0 OK -
 python-devel Python-SDK REQUIRED 2.2 2.7.6 OK -
 pyqt4 Python-Qt4 REQUIRED 4.0 4.10.4 OK -
 cups-devel CUPS-SDK REQUIRED - 1.7.2 OK -
 sane-devel SANE-SDK REQUIRED - 1.0.23 OK -
 libusb USB-Lib REQUIRED - 1.0 OK -
 sane Scan-Lib REQUIRED - 1.0.23 OK -
 cups-image CUPS-Image-Lib REQUIRED - 1.7.2 OK -
 libnetsnmp-devel SNMP-Networking-SDK REQUIRED 5.0.9 5.7.2 OK -
 python-xml Python-XML-Lib REQUIRED - 2.1.0 OK -
 python-notify Desktop-notifications OPTIONAL - - OK -

------------------------------
| Compile Time Dependencies |
------------------------------

 gcc gcc-Compiler REQUIRED - 4.8.2 OK -
 libtool Build-tools REQUIRED - 2.4.2 OK -
 make GNU-Build-tools REQUIRED 3.0 3.81 OK -

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

 cupsext CUPS-Extension REQUIRED - 3.14.6 OK -
 pcardext PhotoCard-Extension REQUIRED - 3.14.6 OK -
 hpmudext IO-Extension REQUIRED - 3.14.6 OK -

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

 hpaio HPLIP-SANE-Backend REQUIRED - 3.14.6 OK 'hpaio found in /etc/sane.d/dll.conf'
 scanext Scan-SANE-Extension REQUIRED - 3.14.6 OK -

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

device `hpaio:/net/ENVY_4500_series?ip=192.168.1.162' is a Hewlett-Packard ENVY_4500_series all-in-one

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

No devices found.

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

ENVY_4500
---------
Type: Printer
Device URI: hp:/net/ENVY_4500_series?ip=192.168.1.162
PPD: /etc/cups/ppd/ENVY_4500.ppd
PPD Description: HP Envy 4500 Series, hpcups 3.14.6
Printer status: printer ENVY_4500 is idle. enabled since Tue 22 Jul 2014 09:59:01 BST
Communication status: Good

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

No errors or warnings.

Done.
arpad@arpad-P170EM:~$

Thanks Srikanth, that solved my question.