Comment 12 for bug 1553328

I guess even with a single display, multi-threaded apps like the web browser could still trigger this nouveau crash or similar by rendering from multiple threads.

There's a comment here suggesting the same crash might also happen in some processes like webbrowser-app even under Unity7:
  https://bugs.launchpad.net/ubuntu/+source/unity8-desktop-session/+bug/1595238/comments/15
which further supports the theory.

Based on upstream's comment https://bugs.freedesktop.org/show_bug.cgi?id=92438#c39 I would expect nouveau to continue to crash under both multi-monitor and other multi-threaded rendering conditions (like webbrowser-app?).