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Good afternoon,

has somebody experience or knowledge how to solve following problem(see below). Thank you in advance!

I have LCD monitor connected to my HP Elite-book 8470w laptop. However after logging into Ubuntu 12.04 LTS second monitor goes blank. (I wrote after logging, because login page is displayed on both screens, although resolution is quite low ).

I have tried turn on the display in system setting but the response is :

requested position/size for CRTC 148 is outside the allowed limit: position=(1600, 0)
, size=(1024, 768), maximum=(1600, 1600)

followed by

GDBus.Error:org.gtk.GDBus.UnmappedGError.Quark._gnome_2drr_2derror_2dquark.Code3:
requested position/size for CRTC 148 is outside the allowed limit: position=(1600, 
0), size=(1024, 768), maximum=(1600, 1600)

xrandr says:
Screen 0: minimum 320 x 200, current 1600 x 900, maximum 1600 x 1600
LVDS connected 1600x900+0+0 (normal left inverted right x axis y axis) 310mm x 174mm
   1600x900       60.0*+   40.0  
   1440x900       60.0     40.0  
   1280x768       60.0     40.0  
   1280x720       60.0     40.0  
   1024x768       60.0     40.0  
   1024x600       60.0     40.0  
   800x600        60.0     40.0  
   800x480        60.0     40.0  
   640x480        60.0     40.0  
DFP1 disconnected (normal left inverted right x axis y axis)
DFP2 disconnected (normal left inverted right x axis y axis)
DFP3 disconnected (normal left inverted right x axis y axis)
DFP4 disconnected (normal left inverted right x axis y axis)
DFP5 disconnected (normal left inverted right x axis y axis)
DFP6 disconnected (normal left inverted right x axis y axis)
DFP7 disconnected (normal left inverted right x axis y axis)
DFP8 disconnected (normal left inverted right x axis y axis)
DFP9 disconnected (normal left inverted right x axis y axis)
DFP10 disconnected (normal left inverted right x axis y axis)
DFP11 disconnected (normal left inverted right x axis y axis)
DFP12 disconnected (normal left inverted right x axis y axis)
CRT1 connected (normal left inverted right x axis y axis)
   1024x768       60.0 +   75.0     70.1  
   1280x1024      75.0     60.0  
   1280x960       75.0     60.0  
   1280x768       75.0     60.0  
   1280x720       75.0     60.0  
   1024x600       75.0     70.1     60.0  
   800x600        72.2     75.0     60.3     56.2  
   800x480        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     67.0     59.9

However, when I set very low resolution on both screens, both displays work OK. I wasn't able to find answer how to increase overall resolution in system. Thank you for your time.

share|improve this question
    
I managed to find answer right after posting. Answer is: I have added >SubSection "Display" Virtual 4096 4096 Viewport 0 0 Depth 24 EndSubSection to /etc/X11/xorg.conf . So my current xorg.conf looks like: >Section "Screen" Identifier "Default Screen" DefaultDepth 24 SubSection "Display" Virtual 4096 4096 Viewport 0 0 Depth 24 EndSubSection EndSection Section "Module" Load "glx" EndSection –  Peter Pit Dec 16 '13 at 13:02

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