Hi, I see same issue into one computer, after a daily upgrade (kde4 was upgraded to QT5). Computer is using Testing/Stretch + KDE
If I run hp-systray under a Konsole : <log> $ hp-systray -x HP Linux Imaging and Printing System (ver. 3.14.6) System Tray Status Service ver. 2.0 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. /usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.py:127: RuntimeWarning: PyOS_InputHook is not available for interactive use of PyGTK set_interactive(1) error: Unable to find hp-upgrade --notify on PATH. </log> Issue look like related on the fact that this software does not find "hp-upgrade". According to https://packages.debian.org/search?searchon=contents&keywords=hp-upgrade&mode=exactfilename&suite=stable&arch=any , "hp-upgrade" exist into Stable/Jessie , but does not exist into Testing/Stretch Strangely, according to https://packages.debian.org/search?searchon=contents&keywords=hp-upgrade&mode=exactfilename&suite=unstable&arch=any , this is exist into some Sid version: - NOT into AMD64 version (3.14.6-1+b1): https://packages.debian.org/sid/amd64/hplip/filelist - version sh4 is OK (3.13.4-1): https://packages.debian.org/sid/sh4/hplip/filelist So, I guest that we lost "hp-upgrade" during 3.14.6-1+b1 upgrade. Best regards, Olivier