[Nouveau] [Bug 91333] Connecting second of two monitors to a Lenovo W520 causes displays to go crazy

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91333

--- Comment #10 from Ilia Mirkin <imirkin at alum.mit.edu> ---
A few people who have had these PDISP errors were due to gnome toggling cursor
state when a CRTC had not been enabled, and nouveau not properly protecting
against it. There was a (lost) patch that fixed it, unfortunately I don't
remember where the place was. Ben should be able to come up with that patch
fairly easily.

However for the user in question, while the PDISP error dumps went away, the
underlying problems remained. Just a thought.

[As an aside, Corey, with reverse-prime you should also be able to get all 3
screens up... see http://nouveau.freedesktop.org/wiki/Optimus/ . Of course
nothing is perfect, this also introduces tons of problem for some people. But
not others.]

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