1

I have installed Ubuntu MATE 18.04.1 LTS with all updates.

Here I have installed HPLIP GUI with

sudo apt install hplip-gui

Then I after reboot I have hp-systray in the tray (indicator applet), but its dropdown menu is not functioning:

hp-systray not showing dropdown menu

How can I fix this behavior?

2

The autostart file from hplip-gui is located in /etc/xdg/autostart/hplip-systray.desktop.

To fix the menu display we need to launch hplip with help of DBus (as in DropBox case) by creating and editing this file:

killall hp-systray
rm ~/.hplip/hp-systray.lock
mkdir -p ~/.config/autostart/
cp /etc/xdg/autostart/hplip-systray.desktop ~/.config/autostart/
sed -i "s/hp-systray -x/dbus-launch hp-systray -x/" ~/.config/autostart/hplip-systray.desktop

and then reboot and enjoy:

hp-systray with dropdown menu

Notes:
This method is useful for 18.04 LTS, 18.10 and 19.04. It is a temporary fix for bug 1810745.

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