bug#29906: 27.0.50; Emacs prompts for passwords in GUI dialog instead of minibuffer

[Eli Zaretskii]

> From: nljlistbox2@gmail.com (N. Jackson)
> Date: Fri, 29 Dec 2017 21:11:44 -0500
> 
> When I start Gnus with `M-x gnus' I get prompted for my password
> (for my authinfo.gpg file) in a GUI dialog box. Expected
> behaviour: The prompt is in the minibuffer.
> 
> Similarly, when I open a .gpg file with `C-x C-f' I am being
> presented with a GUI dialog instead of a prompt in the minibuffer.
> 
> In general I expect to see prompts in the minibuffer unless I
> interact with Emacs with the mouse, through the menus or toolbar.
> 
> This behaviour is new since I last used master a few months ago.

Does this NEWS.26 entry help?

  ** The pinentry.el library has been removed.
  That package (and the corresponding change in GnuPG and pinentry)
  was intended to provide a way to input passphrase through Emacs with
  GnuPG 2.0.  However, the change to support that was only implemented
  in GnuPG >= 2.1 and didn't get backported to GnuPG 2.0.  And with
  GnuPG 2.1 and later, pinentry.el is not needed at all.  So the
  library was useless, and we removed it.  GnuPG 2.0 is no longer
  supported by the upstream project.

  To adapt to the change, you may need to set 'epa-pinentry-mode' to the
  symbol 'loopback'.

What version of GnuPG do you have on that system?