10.10.4 Core Graphics changed vs 10.10.3? (Dual R9 290X)

[Adom Doledas]

So in 10.10.3 I managed to patch the ATI Connectors successfully to boot my Yosemite with 2 or 3 screens as my will (no need to sleep computer and wake it back up, things just work from the moment I hit the power button until it gets into my desktop).

 

I installed it using Clover, UEFI mode. PC Spec:

 

Gigatebyte Z97X Gaming G1 with 4790K.

32GB RAM with XMP On.

R9 290X x2.

Tripple Monitor thru DP and both DVI ports from the card sitting on the 1st PCI-E X16 slot.

 

Funny thing is, on 10.10.3, after I install Clover to boot from my SSD instead of my USB, the OS will not run my screens if I don't inject ATI and patch them properly. But once I inject and patch them, things work very smoothly.

 

Then the 10.10.4 update came in, at first I updated via App Store, everything went through just fine. But a problem occurred, after the loading apple screen passed, the screen had to go black for like 15-60 secs before showing the login screens, instead of nearly immediate (about 0.5-2 sec) when I had been on 10.10.3. I tried reinstalling from scratch the 10.10.4 version instead of updating from 10.10.3 but it's the same, I have to wait a while before I can use my computer.

It's very strange that whether I inject ATI (+patch connectors) or not, the 10.10.4 version can still detect all of my monitors, the only difference was if I don't inject ATI, it will show my cards as "AMD 8xxx 4096MB" instead of "R9 290X 4096MB". While in 10.10.3 it can only run on 1 monitor if I don't inject ATI (the other 2 must be unplugged), or plug all 3 in if I do.

 

Another funny thing is, one of my monitor is 144Hz, on 10.10.3 at the login screen that monitor runs fine at 144Hz and the monitors arrangement was the same from the login screen to the desktop environment. But on 10.10.4, after waiting a while to get to the login screen my 144Hz only runs at 60Hz and monitors arrangement are wrong, only after I log into the desktop my arrangement becomes normal and my 144Hz panel starts to run at 144Hz. 

 

So I have 2 questions:

1. Is there anyway to fix my current problem on 10.10.4? I tried countless connectors patch combination but nothing helped with the delayed login screen, things could only get worse (infinite black screen without even being able to sleep/wake).. which is VERY irritating for me, especially when I know how smooth my system was on 10.10.3.

 

2. Is there a way to go back to 10.10.3? I tried to find a way to download 10.10.3 but everything led to 10.10.4.

 

 

Thank you for your patience and even more if you can help me. Cheers.

[KristaffaH]

What do your patched framebuffers look like?