Black LDVS monitor with 945GME

[carrara at supereva.it]

hi at all,
i have a panel-pc with a sbc intel i370 section of my lspci for graphic car 
is:

00:00.0 Host bridge: Intel Corporation Mobile 945GME Express Memory Controller 
Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GME Express 
Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML 
Express Integrated Graphics Controller (rev 03)

i use this tutorial   http://www.intellinuxgraphics.org/dualhead.html tu setup 
my xorg.conf but wen start x only external vga is on ldvs monitor is black.

dmesg|grep drm give me an error:

[drm] Initialized drm 1.1.0 20060810
[drm] Initialized i915 1.6.0 20060119 on minor 0
[drm:i915_getparam] *ERROR* i915_getparam called with no initialization
[drm:i915_getparam] *ERROR* i915_getparam called with no initialization
[drm:i915_getparam] *ERROR* i915_getparam called with no initialization
[drm:i915_getparam] *ERROR* i915_getparam called with no initialization
[drm:i915_getparam] *ERROR* i915_getparam called with no initialization

my distro and xorg is:

X.Org X Server 1.4.0.90
Release Date: 5 September 2007
X Protocol Version 11, Revision 0
Build Operating System: Slackware 12.1 Slackware Linux Project

xrandr -q:

Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 2048 x 2048
VGA connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 
301mm
   1280x1024      60.0*+   76.0     75.0     71.9     59.9  
   1152x864       75.0     74.8  
   1024x768       75.1     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3  
   640x480        75.0     72.8     66.7     60.0  
   720x400        70.1  
   640x350        70.1  
LVDS connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 
0mm
   1024x768       60.0*+   85.0     75.0     70.1     60.0  
   832x624        74.6  
   800x600        85.1     72.2     75.0     60.3     56.2  
   640x480        85.0     72.8     75.0     59.9  
   720x400        85.0  
   640x400        85.1  
   640x350        85.1  
Unknown-1 connected (normal left inverted right x axis y axis)
   1024x768       60.0  
   800x600        60.3  
   640x480        59.9  

is there someone that can help me or give me some urls to understand the 
problem?

tanks a lot

P.S. excuse me if my english is not clear :D
Umberto

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