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<h2 class="title"><a name="displaydevicenames" id=
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<p>A "display device" refers to some piece of hardware capable of
displaying an image. There are three categories of display devices:
analog displays (i.e., CRTs), digital displays (i.e., digital flat
panels (DFPs)), and televisions. Note that analog flat panels are
considered the same as analog CRTs by the NVIDIA Linux driver.</p>
<p>A "display device name" is a string description that uniquely
identifies a display device; it follows the format
"<type>-<number>", for example: "CRT-0", "CRT-1",
"DFP-0", or "TV-0". Note that the number indicates how the display
device connector is wired on the graphics card, and has nothing to
do with how many of that kind of display device are present. This
means, for example, that you may have a "CRT-1", even if you do not
have a "CRT-0". To determine which display devices are currently
connected, you may check your X log file for a line similar to the
following:</p>
<pre class="screen">
(II) NVIDIA(0): Connected display device(s): CRT-0, DFP-0
</pre>
<p>Display device names can be used in the MetaMode, HorizSync, and
VertRefresh X config options to indicate which display device a
setting should be applied to. For example:</p>
<pre class="screen">
Option "MetaModes" "CRT-0: 1600x1200, DFP-0: 1024x768"
Option "HorizSync" "CRT-0: 50-110; DFP-0: 40-70"
Option "VertRefresh" "CRT-0: 60-120; DFP-0: 60"
</pre>
<p>Specifying the display device name in these options is not
required; if display device names are not specified, then the
driver attempts to infer which display device a setting applies to.
In the case of MetaModes, for example, the first mode listed is
applied to the "first" display device, and the second mode listed
is applied to the "second" display device. Unfortunately, it is
often unclear which display device is the "first" or "second". That
is why specifying the display device name is preferable.</p>
<p>When specifying display device names, you may also omit the
number part of the name, though this is only useful if you only
have one of that type of display device. For example, if you have
one CRT and one DFP connected, you may reference them in the
MetaMode string as follows:</p>
<pre class="screen">
Option "MetaModes" "CRT: 1600x1200, DFP: 1024x768"
</pre>
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