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Query the enabled displays on the Quadros. nvidia-settings -q myserver:0[gpu:0]/EnabledDisplays
nvidia-settings -q myserver:0[gpu:1]/EnabledDisplays
nvidia-settings -q myslave1:0[gpu:0]/EnabledDisplays
nvidia-settings -q myslave1:0[gpu:1]/EnabledDisplays
3. Check the refresh rate is the same for all displays. nvidia-settings -q myserver:0[gpu:0]/RefreshRate
nvidia-settings -q myserver:0[gpu:1]/RefreshRate
nvidia-settings -q myslave1:0[gpu:0]/RefreshRate
nvidia-settings -q myslave1:0[gpu:1]/RefreshRate
4. Make sure the display device we want as master is masterable nvidia-settings -q myserver:0[gpu:0]/
FrameLockMasterable
5. Set the master display device (CRT-0). nvidia-settings -a myserver:0[gpu:0]/FrameLockMaster=
0x00000001
6. Disable the house sync signal on the master device. nvidia-settings -a myserver:0[framelock:0]/
FrameLockUseHouseSync=0
7. Set the slave display devices. nvidia-settings -a myserver:0[gpu:1]/FrameLockSlaves=
0x00000001
nvidia-settings -a myslave1:0[gpu:0]/FrameLockSlaves=
0x00000001
nvidia-settings -a myslave1:0[gpu:1]/FrameLockSlaves=
0x00000001
8. Enable frame lock on server. nvidia-settings -a myserver:0[gpu:0]/
FrameLockEnable=1
1.
NVIDIA Quadro G-Sync II User Guide