[Bug 43668] New: Secondary monitor always in standby on dual head NV94

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org]

https://bugs.freedesktop.org/show_bug.cgi?id=43668

             Bug #: 43668
           Summary: Secondary monitor always in standby on dual head NV94
    Classification: Unclassified
           Product: xorg
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
        ReportedBy: sep16-8DAjSxpRXgY@public.gmane.org
         QAContact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org


Created attachment 54270
  --> https://bugs.freedesktop.org/attachment.cgi?id=54270
Xorg log using nouveau-0.0.16_pre20111109

After switching from the nVidia binary drivers to nouveau, I am unable to use
my dual head setup; the second monitor refuses to come out of standby.

xrandr -q reports that the monitors are recognized and correctly configured.  
In gnome-shell I can drag a window off of the working monitor, so it appears
that the desktop is configured as expected, just that the secondary monitor is
not receiving a signal.

It seems to work fine with no xorg.conf, and I tried various configurations for
about six hours with no success.  The only thing was that when I used the
RightOf/LeftOf options in the Monitors sections, gnome3 would come up in
fallback mode.

nVidia binary drivers 290.10 (and earlier) have worked fine.

 - XFX nVidia GeForce 9600GT (NV50/NV94) w/ dual DVI-I outputs
 - dual NEC 2560x1600 monitors
 - xorg-server 1.11.2
 - nouveau 0.0.16_pre20111109 (also tried _pre20110323)
 - Gentoo amd64 linux-3.1.0

I'll attach some basic logs; let me know if you need anything else.

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