HP Integrity rx2800 i2 2D Graphics Adapter Installation Guide Edition 1

Manual Multi-Screen Configuration
Alternatively you can configure multiple screens by manually editing the /etc/X11/
XF86Config file. The following example will show you how to configure three (3) screens.
XF86Config Changes
There are three sections in the configuration file you need to change:
1. ServerLayout section contains references to the Screen sections.
2. Screen sections contain references to the Device sections.
3. Device sections.
For this example, we will assume there are two (2) HP Integrity rx2800 i2 2D Graphics Adapters
in the system. These graphics cards have the device files /dev/gvid0 and /dev/gvid2. We
will change the XF86Config file to allow for a three-screened (3) multi-head system. In this
configuration, two (2) screens will come from the first graphics card (e.g. /dev/gvid0) and the
remaining screen will come from the second graphics card (e.g. /dev/gvid2).
The lowest level is the Device section. This maps a physical device to a device identifier. The
three (3) Device sections for this example follows:
Section “Device”
Identifier “ATI FireMV 2250(0-1)”
DeviceFile “/dev/gvid0”
EndSection
Section “Device”
Identifier “ATI FireMV 2250(0-2)”
DeviceFile “/dev/gvid0”
Screen 1
EndSection
Section “Device”
Identifier “ATI FireMV 2250(2-1)”
DeviceFile “/dev/gvid1”
EndSection
The first device, ATI FireMV 2250(0–1) is the first screen on the first device. The second
device, ATI FireMV 2250(0–2) is the second screen on the first device. Note that it has the
Screen 1 field, which selects the second video output on the graphics card. The third device,
ATI FireMV 2250(2–1) is the first screen on the second device.
Once the Device sections are defined, you can define the Screen section, which maps a screen
to a physical device. The Screen sections use the Identifier field that was defined for each
of the Device sections. The three (3) Screen sections for this example follows:
Section Screen
Identifier “Screen 0-1”
Device “ATI FireMV 2250 (0) Connector 1”
Monitor “Monitor 0”
# Include other Screen info here, including other SubSections
EndSection
Section Screen
Identifier “Screen 0-2”
Device “ATI FireMV 2250 (0) Connector 2
Monitor “Monitor 0”
# Include other Screen info here, including other SubSections
EndSection
Section Screen
Identifier “Screen 2-1”
Device “ATI FireMV 2250 (1) Connector 1”
Monitor “Monitor 0”
Manual Multi-Screen Configuration 17