Arch Linux

Description: Laserjet Pro M402dne printer was working perfectly for the past year - recently it prints random characters along a line on a single page. Test pages from localhost:631 give a similar result. Internal test pages from the printer's web internal interface print perfectly.


Additional info:
* package version(s)

hplip 1:3.20.2-1
cups 2.3.1-1
cups-pdf 3.0.1-4

* config and/or log files etc.

Running hp-setup gives error messages:

$ hp-setup
/usr/share/hplip/base/utils.py:2061: SyntaxWarning: "is" with a literal. Did you mean "=="?
if weburl is "" or weburl is None:

HP Linux Imaging and Printing System (ver. 3.20.2)
Printer/Fax Setup Utility ver. 9.0

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.

/usr/share/hplip/installer/core_install.py:2074: SyntaxWarning: "is" with a literal. Did you mean "=="?
if home_dir is "":

Steps to reproduce:

Until recently with the printer set up using hplip via hp-setup it was printing fine. Now trying to print a pdf file from any of the available pdf viewers such as Okular gives a page with random characters along a line at the top of the page. A similar output page is generated when sending the printer a test page from localhost:631.

However logging in to the printer, and using its internal web interface it generates normal perfect test pages.

Deleting the printer and setting it up from scratch gives the same result.