as a follow-up to this question I asked a while ago: http://devgurus.amd.com/message/1278253, I am currently attempting to delay a secondary display by 1/4 of a frame with respect to my primary display (each display is connected to a seperate V7900 card).
To do so, I have done the following through the catalyst control panel, in linux.
- Set the primary display as the timing server.
- Set RJ45(1) to output a sync signal from timing server.
- Pass the signal to a seperate microcontroller.
- Generate a new (delayed) sync signal.
- Pass the delayed sync into RJ45(2) - detected correctly.
- Set the secondary display to synchronise to RJ45(2).
According to the catalyst control panel, this process has been effected correctly. However, upon measurement of the output of the projectors, using a photodiode, I notice that this process sometimes works, and sometimes doesn't (they are both perfectly in sync with the timing server). I find myself having to try syncing the second display over and over again until it suddenly works.
Is this not a supported configuration mode for the FirePro S400? Would I have better luck if I generated 2 sync signals externally, and set each card to sync to a seperate RJ45 port, without use of a timing server?