pinentry-{qt,gtk2,gnome3} stopped working pinentry-fltk works, why?

[Gregor Zattler <telegraph@gmx.net>]

Dear fellow debian users, since yesterday pinentry-{qt,gtk2,gnome3}
stopped working.  When I want to decrypt some .gpg file, no dialog
appears and gpg-agent times out.  Luckily pinentry-curses and
pinentry-fltk still do work.

This is on a buster system with gpg* packages from backports,
pinentry* packages from buster (since there are no backports).

Any ideas how to re-enable pinentry-qt (which displays most
info about the key in question)?


Ciao, Gregor
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