Bug#760044: xserver-xorg-video-nouveau: vga output erroneously reported connected both in xrandr and xorg.0.log

[Sven Joachim <svenjoac@gmx.de>]

On 2014-08-31 11:12 +0200, fulvio ciriaco wrote:

> Package: xserver-xorg-video-nouveau
> Version: 1:1.0.10-1+b2
> Severity: normal
>
> Hello
> my xrandr output in current sid is
>
> Screen 0: minimum 320 x 200, current 1600 x 900, maximum 8192 x 8192
> LVDS-1 connected 1600x900+0+0 (normal left inverted right x axis y axis)
> 0mm x 0mm
>   1600x900      60.00*+
>   1152x864      59.96  
>   1024x768      59.92  
>   800x600       59.86  
>   640x480       59.38  
>   720x400       59.55  
>   640x400       59.95  
>   640x350       59.77  
> VGA-1 disconnected (normal left inverted right xaxis y axis)
> DVI-D-1 disconnected (normal left inverted right x axis y axis)
> VGA-2 connected (normal left inverted right x axis y axis)
>   1024x768      60.00  
>   800x600       60.32    56.25  
>   848x480       60.00  
>   640x480       59.94  
> DP-1 disconnected (normal left inverted right x axis y axis)
>
> however, no monitor is really connected to vga-2. 

That's a kernel problem, if you don't intend to use the vga-2 output you
can disable it by booting with the video=VGA-2:d kernel parameter.  See
https://wiki.archlinux.org/index.php/Nouveau#Phantom_Output_Issue.

> The nuisance is that my screen starts at reduced resolution.

The phantom output is not going to deliver a valid EDID, and for such
outputs the kernel assumes a resolution of 1024x768.

> [   10.184674] nouveau W[     DRM] unknown connector type 51

Do you get this warning with the wheezy kernel as well?

Cheers,
       Sven