[Nouveau] Dual monitors have same identifier

[Peter Hewett]

Hi
My desktop is Kubuntu 15.10 with GeForce GTX 970 and two monitors, using
the Nouveau drivers.

In System Settings > Display and Monitor, the two monitors are shown but
with the same identifier, DVI-0. This is giving some problems such as
random allocation of primary screen and no right click on one of the
monitors.

How can I get the monitors to have different identifiers?

Thank you

Peter