[Nouveau] [Bug 85160] [NV94] INVALID_STATE error, X fails to start on GeForce 9600 GT with dual monitors, kernels 3.18.0-0.rc0.git8.2.fc22.1 onwards

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85160

--- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> ---
A user on IRC bisected a failure that resulted in PDISP getting very unhappy
to:

commit 1dce6264045cd23e9c07574ed0bb31c7dce9354f
Author: Roy Spliet <rspliet at eclipso.eu>
Date:   Fri Sep 12 18:00:13 2014 +0200

    drm/nv50/kms: Set VBLANK time in modeset script

    Solves blinking on reclocking memory. The value set is an underestimate,
but
    with non-reduced vblanking this should give us plenty of time

    Signed-off-by: Roy Spliet <rspliet at eclipso.eu>
    Signed-off-by: Ben Skeggs <bskeggs at redhat.com>

You should safely be able to revert this commit, see if that helps.

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