The original article was written on 2011-11-22 about GNOME 3.0. And I need to update for GNOME 3.1x, because gnome-session-properties has gone.
How to fix
This problem is old enough. For Debian, we have at least two bug reports.
For new machine, here is my GnuPG settings.
I create .gnupg/gpg.conf file with the following content.
use-agent personal-digest-preferences SHA256 cert-digest-algo SHA256 default-preference-list SHA512 SHA384 SHA256 AES256 AES192 AES CAST5 ZLIB BZIP2 ZIP Uncompressed default-key 0x4ca7babe
I deactivate seahose-agent. Also, I …