pinentry - Impossible to disable/ignore if present?

[Jules Colding]

Hi,

I find that pinentry unconditionally is being launched whenever I
attempt to encrypt or decrypt something using gpgme. 

I've checked that the callback function is being set correctly using a
combination of gpgme_set_passphrase_cb() and gpgme_get_passphrase_cb().

Unfortunately this is totally ignored by the underlying GnuPG framework
and pinentry is unconditionally launched to query for a passphrase. My
private passphrase callback function is never invoked.

Any ideas?

Thanks,
  jules