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Sun Fire V880z Server and Sun XVR-4000 Graphics Accelerator Installation and User’s Guide • May 2003
3. Set the master and slave graphics boards.
You can enable genlock while the X Window system is running, however, you
should first verify that the master device is initialized. (see Step 4).
In this example,
zulu0
is the genlock master device, and
zulu1
is the slave device.
The
-outputs streamA
option directs the same video stream through both 13W3
device ports, sending the same stream simultaneously to a display device and to a
slave graphics accelerator for genlocking. See Chapter 6, “
on page 38 for more information.
4. Verify that the master device is initialized before the slave device is initialized.
If both devices are in the same system, the master device should appear before the
slave device in the
Xservers
file. Where
zulu0
is the master device in this
example, you can verify that
zulu0
is the first entry in the
Xservers
file
Xsun
command-line entry.
If the master device is not initialized prior to the slave device in the
Xservers
file,
then when the X Window system restarts on the slave device, the slave device
genlock input connector will not recognize the master device. Therefore, the slave
device attempt to genlock with the master device will fail.
If the slave device is initialized first, the slave device will start up but without
enabling genlock. You can then enable genlock for the slave device through the
fbconfig
command:
Genlock Options
fbconfig -genlock hphase
and
vphase
suboptions enable relative or absolute
setting of horizontal and vertical phase, respectively. The horizontal phase allows a
pixel offset between the external video format and the stream output. The vertical
phase allows a scanline offset between the external video format and the stream
output.
host% fbconfig -dev zulu0 -master a -stream a -slave disable -outputs streamA
host% fbconfig -dev zulu1 -stream a -slave enable genlock
:0 Local local_uid@console root /usr/openwin/bin/Xsun -dev
/dev/fbs/zulu0 -dev /dev/fbs/zulu1
host% fbconfig -dev zulu1 -stream a -slave enable genlock
