[Bug 91142] [Intel HD 4000][intel-virtual-output] Screens attached to secondary graphics card no longer function

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91142

--- Comment #6 from Chris Wilson <chris at chris-wilson.co.uk> ---
I presume you expect

Screen 0: minimum 8 x 8, current 3000 x 1920, maximum 16384 x 16384
VGA-0 disconnected primary (normal left inverted right x axis y axis)
LVDS-0 disconnected (normal left inverted right x axis y axis)
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 connected 1080x1920+1+0 right (normal left inverted right x axis y axis)
477mm x 268mm panning 2160x1920+0+0 tracking 3000x1920+0+0 border 0/0/0/0
   1920x1080      60.0*+
   1680x1050      60.0  
   1600x900       60.0  
   1280x1024      75.0     60.0  
   1280x800       59.8  
   1280x720       60.0  
   1024x768       75.0     60.0  
   800x600        75.0     60.3  
   640x480        75.0     59.9  
DP-2 connected 1920x1080+1+0 (normal left inverted right x axis y axis) 477mm x
268mm panning 3000x1080+0+0 tracking 3000x1920+0+0 border 0/0/0/0
   1920x1080      60.0*+
   1680x1050      60.0  
   1600x900       60.0  
   1280x1024      75.0     60.0  
   1280x800       59.8  
   1280x720       60.0  
   1024x768       75.0     60.0  
   800x600        75.0     60.3  
   640x480        75.0     59.9  
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
DP-5 disconnected (normal left inverted right x axis y axis)

i.e. a pair of DisplayPort outputs on the nvidia device. However, it is only
reporting 

Screen 0: minimum 8 x 8, current 8 x 8, maximum 16384 x 16384
VGA-0 connected primary (normal left inverted right x axis y axis)
   1024x768      60.00 +
   800x600       72.19    60.32    56.25  
   640x480       59.94  
   512x384       60.00  
   400x300       72.19  
   320x240       60.05  
LVDS-0 disconnected (normal left inverted right x axis y axis)
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
DP-5 disconnected (normal left inverted right x axis y axis)


The problem seems to be originating in the nVidia driver not detecting the
outputs. The ACPI warnings are related, but I don't know if they are
significant. Look for something in the bumblebee Xorg.8.log and try rolling
back the kernel, or the nvidia driver.

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