GTX 970 Dual monitor on Sierra fails

[MrTrip]

I'm running Oz bootloader. Just recently upgraded bootloader to upgrade to Sierra. After upgrading bootloader only one monitor worked, upgraded to Sierra anyway and still only one screen is working.

 

Not sure where to go from here, latest drivers etc. all installed.

 

Info: MSI Z97 Gaming 7 Motherboard - i7 4790k Processor - Ozmosis Bootloader - Latest web drivers from NVIDIA

 

Anymore info that is needed let me know or any directions I could look to go about fixing this would be helpful

[bbeepp]

Have you tried IMac smbios 14.2?

[MrTrip]

Have you tried IMac smbios 14.2?

 

That is what I am currently using....unless you see something wrong here?

	<key>Defaults:4D1FDA02-38C7-4A6A-9CC6-4BCCA8B30102</key>
	<dict>
		<key>BaseBoardAssetTag</key>
		<string>Base Board Asset Tag#</string>
		<key>BaseBoardSerial</key>
		<string>*snip*</string>
		<key>BiosDate</key>
		<string>09/03/2013</string>
		<key>BiosVersion</key>
		<string>IM142.88Z.0118.B00.1309031249</string>
		<key>BoardVersion</key>
		<string>10</string>
		<key>ChassisAssetTag</key>
		<string>iMac-Aluminum</string>
		<key>EnclosureType</key>
		<integer>13</integer>
		<key>FirmwareFeatures</key>
		<integer>2147488791</integer>
		<key>FirmwareFeaturesMask</key>
		<integer>3221487415</integer>
		<key>FirmwareRevision</key>
		<integer>65546</integer>
		<key>FirmwareVendor</key>
		<string>Apple</string>
		<key>HardwareAddress</key>
		<string>d8:cb:8a:14:ba:88</string>
		<key>Manufacturer</key>
		<string>Apple Inc.</string>
		<key>ProcessorSerial</key>
		<string>*snip*</string>
		<key>ProductFamily</key>
		<string>iMac</string>
		<key>ProductId</key>
		<string>Mac-27ADBB7B4CEE8E61</string>
		<key>ProductName</key>
		<string>iMac14,2</string>
		<key>SystemSKU</key>
		<string>System SKU#</string>
		<key>SystemSerial</key>
		<string>*snip*</string>
		<key>SystemVersion</key>
		<string>1.0</string>
	</dict>

[computergek80]

Is there always only one output that's working? Or are you getting glitches on the others? Which port layout does your card have? 

 

My GTX 970 won't output a correct signal over DP1.2. At least not at 3840x2160@60. I haven't tried any other displays yet, or any forced resolutions. I'm hoping our issues are related. 

[MrTrip]

Is there always only one output that's working? Or are you getting glitches on the others? Which port layout does your card have? 

 

My GTX 970 won't output a correct signal over DP1.2. At least not at 3840x2160@60. I haven't tried any other displays yet, or any forced resolutions. I'm hoping our issues are related. 

 

Always only one output working, I will try switching around the outputs, however I only have two DVI, one DP and one HDMI.

[pmcnano]

Always only one output working, I will try switching around the outputs, however I only have two DVI, one DP and one HDMI.

Did you fix this? lol, I had it working perfectly and I am unsure what I did to break it!

[MrTrip]

No fix yet, so what I've found out is only DVI works.

 

DP and HDMI are not working. DVI works just fine. I've unhooked everything except DP and it gets to where the desktop should show up and goes black. I've also done the same for HDMI and same result.

 

Total bummer so far, I have no idea what to do, since tonymac is a swear word around here I won't link what I found, but it didn't seem to work anyway....

[MrTrip]

Man, this just fixed it...

 

http://www.insanelymac.com/forum/topic/291655-ozmosis/page-168?do=findComment&comment=2195148

 

I entered the terminal command and rebooted and boom, dual monitors again....