Currently hplip installs /etc/xdg/autostart/hplip-systray.desktop even if qt is not enable, which caused an error. There's already code in the ebuild to not install the QT-specific stuff if that flag isn't beign used. It just need to be extended to include the autostart desktop entry too.
Created attachment 182698 [details, diff] remove /etc/xdg/autostart/hplip-systray.desktop with the other qt stuff
This is already fixed with 3.9.2
Yeah already fixed.
broken again in hplip-3.17.10 https://bugs.gentoo.org/259763
https://bugs.gentoo.org/638770