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#1 2012-12-03 23:42:25

suley
Member
Registered: 2012-12-02
Posts: 9

How to configure triple monitors?

Since I installed the Arch, I found that the Arch wiki is very detailed. I even found a DisplayLink setup page for my displaylink device.
So after I installed the XFCE4, I tried to make my 3rd monitor work by using the DisplayLink USB External Graphic Card.
However, My Arch works well without configuration of Xorg, but I am only able to find 2 monitors in the xrandr --current output.

Screen 0: minimum 320 x 200, current 1920 x 1880, maximum 8192 x 8192
LVDS1 connected 1280x800+0+1080 (normal left inverted right x axis y axis) 261mm x 163mm
   1280x800       60.0*+   50.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 510mm x 287mm
   1920x1080      60.0*+
   1680x1050      60.0  
   1680x945       60.0  
   1400x1050      74.9     60.0  
   1600x900       60.0  
   1280x1024      75.0     60.0  
   1440x900       75.0     59.9  
   1280x960       60.0  
   1366x768       60.0  
   1360x768       60.0  
   1280x800       74.9     59.8  
   1152x864       75.0  
   1280x768       74.9     59.9  
   1024x768       75.1     70.1     60.0  
   1024x576       60.0  
   800x600        72.2     75.0     60.3     56.2  
   848x480        60.0  
   640x480        72.8     75.0     60.0  
   720x400        70.1  
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
DP3 disconnected (normal left inverted right x axis y axis)

So I do what the wikipage says, touch a new configuration file in /etc/X11/xorgconf.d, and write a configuration into it.

################ DisplayLink Stuff ###################
Section "Device"
       Identifier      "DisplayLinkDevice"
       Driver          "fbdev"
       BusID           "USB"               # needed to use multiple DisplayLink devices 
       Option          "fbdev" "/dev/fb1"  # change to whatever device you want to use
#      Option          "rotate" "CCW"      # uncomment for rotation
EndSection

Section "Device"
       Identifier      "InnerDisplayDevice"
       Driver          "intel"
       BusID           "PCI:0000:00:02"       
EndSection

Section "Monitor"
       Identifier      "DisplayLinkMonitor"
EndSection

Section "Monitor"
       Identifier      "DisplayLinkMonitor1"
EndSection

Section "Screen"
       Identifier      "DisplayLinkScreen"
       Device          "DisplayLinkDevice"
       Monitor         "DisplayLinkMonitor"
       DefaultDepth    16
EndSection

Section "Screen"
       Identifier      "DisplayLinkScreen1"
       Device          "InnerDisplayDevice"
       Monitor         "DisplayLinkMonitor1"
       DefaultDepth    16
EndSection

however, only the monitor which connect to Displaylink USB Graphic Card works, when I use xrandr --current, there only show 1 monitor.
Any guys knows how to figure out the problem? Thanks a lot.
BTW, my internal Graphic Card is:

00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)

Last edited by suley (2012-12-04 00:46:29)

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#2 2012-12-04 03:34:56

moetunes
Member
From: A comfortable couch
Registered: 2010-10-09
Posts: 1,033

Re: How to configure triple monitors?

The wiki entry you linked could be written a little better.
You don't show a ServerLayout like the wiki says but doesn't show fully.

Section "ServerLayout"
    Screen		0	"DisplayLinkScreen"
    Screen		1	"Internal" RightOf "DisplayLinkScreen"
    Option		"Xinerama" "on"
EndSection

HTH


You're just jealous because the voices only talk to me.

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