Polkit and USB Mount Authentication
Suddenly popping in a USB or CD/DVD was asking for authentication! Short story, polkit issue. Edit org.freedesktop.udisks2.policy in /usr/share/polkit-1/actions and change:
org.freedesktop.udisks2.filesystem-mount-other-seat
org.freedesktop.udisks2.eject-media-other-seat
to read:
“<allow_active> yes</allow_active>”