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ATI 7970 3 Monitors Detected Only 2 Getting Signal


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I've just switched to Clover from Chimera and so far everything seems to be running normally except for my multi display.

 

System is:

Intel i7-3770k

Asus Sabertooth Z77

Asus 7970 (2DVI + 4 DP) - Set to Primary GPU in BIOS

 

I've got all my monitors connected to 3 of the DP, and in System Preferences > Displays > Arrangement I can see all three. Likewise in System Information > Graphics/Displays all 3 are listed.

 

However only 2 of the monitors are receiving a signal. I am using the OPM frame buffer for the 6 DP connections, however I've tried various other frame buffers with the same result.

 

In my clover config.plist I have the FB Name set to OPM and Video Ports set to 6, nothing else. (If I Inject ATI only one monitor will be recognized).

 

Oddly enough if I set my Primary GPU to the integrated Intel and connect via HDMI I can get all 3 monitors receiving a signal plus the 4th on the integrated. However this is not the setup I want as then I have to switch back and forth to HDMI when booting. 

 

Is there a way to get all the monitors receiving a signal with my discrete 7970 set as primary?

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You need to modify the framebuffer for your connectors. Basically, the frame buffer you are using is probably made for slightly different connectors. Rampagedev has a great guide on this and there's also some info in the clover guide and wiki. Clover can autopatch the kext so you don't need to modify it after every update. You may be able to find an existing connectors patch for your card.

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I believe I have tried that, the ATIConnector Patch (listed here http://www.insanelymac.com/forum/topic/282787-clover-v2-instructions/?do=findComment&comment=1853099). I just tried again after reading Rampagedev's blog post.

 

I'm currently using Futomaki and I've only applied the ATIConnector Patch to the 4 DP ports as I don't use the DVI.

 

I've tried with several frame buffers but no success, and when I try ATIInject I get no displays at all when I boot. Maybe my problem is ATIInject?

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I believe I have tried that, the ATIConnector Patch (listed here http://www.insanelymac.com/forum/topic/282787-clover-v2-instructions/?do=findComment&comment=1853099). I just tried again after reading Rampagedev's blog post.

 

I'm currently using Futomaki and I've only applied the ATIConnector Patch to the 4 DP ports as I don't use the DVI.

 

I've tried with several frame buffers but no success, and when I try ATIInject I get no displays at all when I boot. Maybe my problem is ATIInject?

the framebuffers require ati inject to use them (AFAIK). I would just try every single framebuffer, find which one is working the best, and then patch that one. Even if the amount of connectors is different then your card, as long as it has at least the amount of ports you're actually using you should be OK. For example, on my 6670, I only have 3 ports but the framebuffer that works the best for me is made for 4 ports so I edited that one. For some reason though I'm having a similar problem to you with my v4800.
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After finally finding a framebuffer that would give me a signal (Junsai) with ATIInject I did try again editing the connectors and trying all the control flags but no luck. 

 

I'm back to using the integrated graphics as primary and no ATIInject (which I believe just defaults to Futomaki anyway). Over all seems more stable than Junsai, just would have preferred not to have to use the integrated HDMI for boot, etc.

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