No output from sDVO DVI

Kevin Downey redchin at
Sat Jul 21 13:11:17 PDT 2007

I have an sDVO card with two dvi connectors. I want a Xinerama type
desktop across multiple displays but I do not get a video signal from
the sDVO card even though in the Xorg.0.log it seems to detect the
monitor's EDID stuff fine.  In the past dealing with video cards with
multiple outs, while booting up I would see the dmesg (and maybe the
BIOS stuff, don't remember) on both connected screens, now I do not,
but maybe sDVO is different.

I have an lcd connected to the VGA out on the motherboard and a CRT
using a dvi-vga adapter on the "primary" dvi out on the sdvo card.

xrandr says:
Screen 0: minimum 320 x 200, current 2080 x 1024, maximum 2560 x 2560
VGA connected 1280x1024+0+0 (normal left inverted right) 0mm x 0mm
   1600x1200      60.0
   1600x1024      60.0
   1400x1050      60.0
   1280x1024      60.0*
   1280x960       60.0
   1152x864       75.0
   1024x768       70.1     60.0
   832x624        74.6
   800x600        72.2     75.0     60.3     56.2
   640x480        72.8     75.0     59.9
TMDS-1 connected 800x600+1280+0 (normal left inverted right) 1mm x 257mm
   1024x768       60.0
   800x600        84.9     75.0*    60.3
   640x480        84.6     75.0     60.0
   720x400        70.1
TMDS-2 disconnected (normal left inverted right)

metacity places windows on the TMDS-1 display so it is there, just not
getting output.


The sDVO has DVI-I connectors.

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