Comment 16 for bug 1508075

Neither of the above solutions are perfect, thus for x and beyond (and for Debian), I'd actually like to change it like this: udisks2-inhibit should create a temporary udev rule in /run/udev/rules.d/ with

  SUBSYSTEM=="block", ENV{UDISKS_IGNORE}="1" on all block devices.

and then "udevadm trigger -subsystem-match=block" to apply it to existing devices.

Note that UDISKS_AUTO="0" won't suffice: We don't only want to avoid auto-mounting external USB storage (as we might install onto that), but also avoid accidental manual mounts by clicking on newly appearing drive icons.