Corp. Computer Hardware User Manual

50
NVIDIA Quadro G-Sync II User Guide
The following are the basic steps:
Open a display connection to each X Screen you want to control in
your frame lock cluster.
Make sure you have privileges to establish the X connection.
Query the NV_CTRL_FRAMELOCK attribute to determine if frame
lock is supported on each X screen.
Set
NV_CTRL_FRAMELOCK_MASTER to NV_CTRL_FRAMELOCK_
MASTER_TRUE on one node in the cluster; set it to NV_CTRL_
FRAMELOCK_MASTER_FALSE on every other node in the cluster.
Set
NV_CTRL_FRAMELOCK_POLARITY for each slave node in the
cluster.
Most likely, you want NV_CTRL_FRAMELOCK_POLARITY_RISING_
EDGE.
Set
NV_CTRL_FRAMELOCK_SYNC_DELAY as appropriate for each
node.
Most likely, you want 0.
Set
NV_CTRL_FRAMELOCK_SYNC_INTERVAL as appropriate if you
are using a house sync.
Most likely, you want 0.
Set
NV_CTRL_FRAMELOCK_SYNC to NV_CTRL_FRAMELOCK_SYNC_
ENABLE on each X screen to enable frame lock.
(Optional) Set
NV_CTRL_FRAMELOCK_TEST_SIGNAL to NV_CTRL_
FRAMELOCK_TEST_SIGNAL_ENABLE followed immediately by
NV_CTRL_FRAMELOCK_TEST_SIGNAL_DISABLE.
This guarantees accuracy of the Universal Frame Count (as
returned by glXQueryFrameCountNV()).
When you are done, set
NV_CTRL_FRAMELOCK_SYNC to NV_CTRL_
FRAMELOCK_SYNC_DISABLE on each X screen to disable frame
lock.
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