After this has been giving me a lot of headache and throwing curses at all and everything because nothing worked nearly out of the box – it looks like I finally managed to get gpg cards (yubi key and the one from kernelconcepts) working as intended …
sudo apt-get purge --remove libpam-gnome-keyring -y && \ sudo apt-get install pcscd pcsc-tools gpgsm gnupg-agent scdaemon -y && \ sudo reboot
and check out this link
Working – finally!
Additional info from 04.07.2016 – Looks like Ubuntu 16.04 also needs a
sudo chmod -x /usr/bin/ssh-agent
for not starting the ssh-agent anymore… (Any hints will be much appreciated!)…