It turns out that the patch from comment #2 is wrong. If GNOME is running without systray, hp-toolbox will exit after ~15s if this patch is applied because the hplip service threads have been terminated by the failing systray.
The patch from comment #3 os sufficient to fix the GNOME logout problem.
It turns out that the patch from comment #2 is wrong. If GNOME is running without systray, hp-toolbox will exit after ~15s if this patch is applied because the hplip service threads have been terminated by the failing systray.
The patch from comment #3 os sufficient to fix the GNOME logout problem.