[SOLVED] Dual head config. on Debian 5.0.7, "default" is the only listed output

lppatmore · 12-28-2010, 08:10 PM

I'm trying to configure Debian to have a spanning desktop with two monitors. One is VGA, and the other is Display Port. They are both with the video hardware on the motherboard, an Intel 4 Series Chipset Graphics Controller.

This is the output I get when I do a query on xrandr:

Code:

Screen 0: minimum 640 x 480, current 1600 x 1200, maximum 1600 x 1200
default connected 1600x1200+0+0 0mm x 0mm
   1600x1200      61.0* 
   1280x1024      76.0  
   1024x768       76.0  
   800x600        73.0  
   640x480        73.0

Note that it does not list the VGA and the Display Port outputs separately, there is only "default", and the output is cloned on both of my displays.

When I went to examine my xorg.conf, I found it rather ambiguous looking, like the system didn't understand the hardware or doesn't have the proper driver. Here it is:

Code:

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"kbd"
	Option		"XkbRules"	"xorg"
	Option		"XkbModel"	"pc104"
	Option		"XkbLayout"	"us"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
EndSection

Section "Device"
	Identifier	"Configured Video Device"
EndSection

Section "Monitor"
	Identifier	"Configured Monitor"
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Monitor		"Configured Monitor"
EndSection

Does it need a driver specific to my video hardware in order to detect two outputs? How can I edit my xorg.conf for dual head? Any assistance would be greatly appreciated.

mahu_mahu · 12-28-2010, 11:29 PM

Try this link:
http://www.jejik.com/articles/2008/1..._debian_lenny/

lppatmore · 12-28-2010, 11:36 PM

I can't use xrandr because it does not recognize the two different outputs. I think xorg.conf needs to be edited, but I don't know what to change or add to the file. I read the manual page, but it wasn't particularly helpful in regards to outputs -- what I'm concerned with.

TobiSGD · 12-29-2010, 12:44 AM

Debian 5.0.7/Lenny doesn't work well with the Series 4-graphics. I would recommend to upgrade to Squeeze, and you should be fine.

lppatmore · 12-29-2010, 03:07 PM

That solved my problem. A query in xrandr now prints this:

Code:

Screen 0: minimum 320 x 200, current 3360 x 1050, maximum 8192 x 8192
VGA1 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 473mm x 296mm
   1680x1050      60.0*+   60.0  
   1600x1200      60.0  
   1280x1024      75.0     60.0  
   1440x900       75.0     59.9  
   1152x864       75.0  
   1024x768       75.1     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        72.8     75.0     66.7     60.0  
   720x400        70.1  
HDMI1 connected 1680x1050+1680+0 (normal left inverted right x axis y axis) 473mm x 296mm
   1680x1050      60.0 +   60.0* 
   1600x1200      60.0  
   1280x1024      75.0     60.0  
   1440x900       75.0     59.9  
   1152x864       75.0  
   1024x768       75.1     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        72.8     75.0     66.7     60.0  
   720x400        70.1  
DP1 disconnected (normal left inverted right x axis y axis)

I used a graphical program called grandr to configure it. Thank you.