
●
It uses only a single X screen. The NVIDIA driver conceals all information about multiple display devices
from the X server. As far as the X server is concerned, there is only one screen.
●
Both display devices share one frame buer. Thus, all the capabilities present on a single display (for
example, accelerated OpenGL) are available with TwinView.
●
There is no additional overhead when emulating a single desktop.
For example, if all receivers have either single or dual monitors, you should congure the X server to think it
has the monitor with the highest resolution used on any of the receivers. This allows the X server to support
as many display resolutions as possible. You do this by capturing the EDID information from the monitor (see
Creating an EDID le on page 37) and making the following additions to the le xorg.conf.
The below example uses dual HP LP2465 displays. The following text is added under the Device section of
xorg.conf:
Option "ConnectedMonitor" "DFP-0,DFP-1"
Option "CustomEDID" "DFP-0:/etc/X11/lp2465edid.bin;DFP-1:/etc/X11/
lp2465edid.bin"
Now that the X server thinks it has dual HP LP2465 displays attached to it, enable TwinView support and
congure the supported single and dual display layouts under the Screen section:
Option "TwinView" "True"
Option "MetaModes" "DFP-0: 1920x1200 +0+0, DFP-1: 1920x1200 +1920+0;
DFP-0: 1920x1200 +0+0, DFP-1:NULL"
SubSection "Display"
Depth 24
EndSubSection
NOTE: In the above example, NULL represents a single display conguration. This line will cover both dual
and single display congurations.
To support additional resolutions, dene additional combinations on the same line:
Option "MetaModes" "DFP-0: 1920x1200 +0+0, DFP-1: 1920x1200 +1920+0;
DFP-0: 1920x1200 +0+0, DFP-1:NULL; DFP-0: 1680x1050 +0+0, DFP-1:
1680x1050 +1680+0; DFP-0: 1680x1050 +0+0, DFP-1:NULL; DFP-0: 1600x1200
+0+0, DFP-1: 1600x1200 +1200+0; DFP-0: 1600x1200 +0+0, DFP-1:NULL; DFP-0:
1400x1050 +0+0, DFP-1: 1400x1050 +1400+0; DFP-0: 1400x1050 +0+0,
DFP-1:NULL; DFP-0: 1280x1024 +0+0, DFP-1: 1280x1024 +1280+0; DFP-0:
1280x1024 +0+0, DFP-1:NULL"
NOTE: The EDID le provided to the X server must still support the listed resolutions.
Creating an EDID le
To create an EDID le:
▲
Use the NVIDIA tool nvidia-settings to create an EDID le in either .bin or .txt format.
IMPORTANT: A physical display must be attached before you can use the NVIDIA tool.
TIP: You can also use the method for Windows described in Creating and applying an EDID le on page 34
and copy the EDID le to the Linux system.
Display 37
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