[Bug 109187] New: [NVC1][optimus] nouveau black display, only mouse cursor visible

* [Bug 109187] New: [NVC1][optimus] nouveau black display, only mouse cursor visible
@ 2018-12-31  0:03 bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
       [not found] ` <bug-109187-8800-V0hAGp6uBxMKqLRl/0Ahz6D7qz1kEfGD2LY78lusg7I@public.gmane.org/>
  0 siblings, 1 reply; 6+ messages in thread
From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ @ 2018-12-31  0:03 UTC (permalink / raw)
  To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW

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https://bugs.freedesktop.org/show_bug.cgi?id=109187

            Bug ID: 109187
           Summary: [NVC1][optimus] nouveau black display, only mouse
                    cursor visible
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: dominik-IZ6Av6enwRKJQ7yn63+t2w@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

Created attachment 142919
  --> https://bugs.freedesktop.org/attachment.cgi?id=142919&action=edit
Xorg.log with intel+nouveau drivers

I'm getting black output on HDMI-connected display driven by nVidia GeForce GT
525M (GF108M). Mouse cursor is visible on both built-in display and on the
external HDMI-connected display. This used to work on Fedora 27. I can see this
on Fedora 29, but I can't pinpoint which package update broke it because I
haven't checked the external display (a projector) for quite some time. This
machine is a Dell XPS 15 L502X with Intel HD3000 integrated graphics and nVidia
GeForce GT 525M discrete GPU in Optimus configuration. Here's my xorg.conf
snippet:

Section "Monitor"
        Identifier "Internal LCD"
        DisplaySize 345 195
EndSection

Section "Monitor"
        VendorName "Benq"
        ModelName  "W1100"
        Identifier "Projector"
        DisplaySize 16900 9400
EndSection

Section "Device"
        Identifier "Internal Graphics"
        Driver     "intel"
        Option     "Monitor-LVDS1" "Internal LCD"
        Option     "TearFree" "on"
EndSection

Section "Device"
        Identifier "Optimus Graphics"
        Driver     "nouveau"
        Option     "Monitor-HDMI-1-2" "Projector"
EndSection

Switching both drivers to "modesetting" makes the issue go away. I'm attaching
Xorg logs for both configurations.

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