WARNING: gnome-keyring:: couldn't connect to: /home/username/.cache/keyring-XXXXXX/pkcs11: No such file or directory

[David Christensen <dpchrist@holgerdanske.com>]

debian-user:

I'm running MATE on Debian Wheezy amd64.  SMPlayer is unable to play 
*.wav files (double-click on file in Caja, SMPlayer opens but nothing 
happens).  If I start mplayer from the shell, the music plays but I see 
the subject warning:

    $ mplayer Data/dpchrist/Music/Rush/Moving\ Pictures/01\ Tom\ Sawyer.wav
    WARNING: gnome-keyring:: couldn't connect to: 
/home/dpchrist/.cache/keyring-gEGbS3/pkcs11: No such file or directory
    ...


STFW I've run into this problem before with XFCE:

    https://lists.debian.org/debian-user/2013/08/msg00935.html

Which lead to this solution for LXDE:


http://hongouru.blogspot.com.ar/2012/07/solved-warning-gnome-keyring-couldnt.html

Which I modified for XFCE:

    https://lists.debian.org/debian-user/2013/08/msg01008.html


I'm wondering if the above solution is what I need for MATE.  Checking 
the file system, I see:

    /etc/xdg/autostart/mate-keyring-pkcs11.desktop

Which has a setting:

    OnlyShowIn=MATE;

I also see:

    /etc/xdg/autostart/gnome-keyring-pkcs11.desktop

With the setting:

    OnlyShowIn=GNOME;Unity;


My guess is that MATE, mplayer, and/or smplayer aren't integrated, and 
that the above solution might work if I add MATE to the 
gnome-keyring-pkcs11.desktop file and/or add GNOME to the 
mate-keyring-pkcs11.desktop file (?).


Any suggestions?


TIA,

David