Dual monitor problem with onboard HD6400 on ASUS Z97M Plus

I successfully installed Yosemite 10.10.3 on my system with these specs
- Intel® Core™ i5-4690K
- Crucial Ballistix Sport 8GB x 2
- SanDisk SSD 128GB
- Samsung SyncMaster 2253LW connected with a DVI cable

Everything works fine except Yosemite does not recognize my second monitor. My second monitor is a

- Auria276WN connected with a VGA cable connected with a VGA cable.

The second monitor show nothing but distorted images (like the picture below). I also connected my second monitor with an HDMI cable but it still had the same problem.



My multibeast setting are


Drivers -> Disk -> 3rd Party SATA
Drivers -> Misc -> FakeSMC v6.14.1364
Bootloaders -> Chimera v4.1.0
Customize -> Boot Options -> Basic Boot Options
Customize -> Boot Options -> Generate CPU States
Customize -> Boot Options -> Hibernate Mode - Desktop
Customize -> Boot Options -> Use KernelCache
Customize -> Boot Options -> Kext Dev Mode
Customize -> System Definition -> Mac Pro -> Mac Pro 3,1
Customize -> Themes -> tonymacx86 Black


Drivers > Audio > Realtek ALCxxx > ALC887/888b Current v100302
Drivers > Disk > 3rd Party SATA
Drivers > Disk > TRIM Enabler > 10.10.3 TRIM Patch
Drivers > Misc > FakeSMC v6.14.1364
Drivers > Misc > FakeSMC v6.14.1364 Plugins
Drivers > Misc > FakeSMC v6.14.1364 HWMonitor Application
Drivers > Network > Intel > AppleIntelE1000e v3.0.4.1a
Drivers > System > AppleRTC Patch for CMOS Reset
Bootloaders > Chimera v4.1.0
Customize > Boot Options > Generate CPU States
Customize > Boot Options > Hibernate Mode - Desktop
Customize > Boot Options > Kext Dev Mode
Customize > Boot Options > Use KernelCache
Customize > Boot Options > Verbose Boot
Customize > System Definitions > Mac Pro > Mac Pro 3,1
Customize > Themes > tonymacx86 Black



Does anyone know why this is happening and how to fix it?

alwaysmacking said:

Auria276WN connected with a VGA cable connected with a VGA cable.

Click to expand...

OS X does not support VGA, digital only.

I tried with one DVI and one HDMI cable as well but it didn't work.

Any luck with this? I'm having the same problem.

Hey guys. I just ran intro this problem and was searching all over for a solution for this MB(asus z97m plus) specifically, and I believe this might help. I had my main monitor (Acer G237HLbi) connected via HDMI/HDMI and my second monitor connected via DVI/HDMI (old 32inch sharp Tv). Everything booted up fine and screens were detected, however, on my second monitor, I had the same issue OP did. I went to system preferences-> displays -> gather windows and selected my second monitor panel and adjusted the upscale slider. The second display fixed itself ,however, there was a resolution issue with the top menu bar hidden from view. Therefore, I switched the cables this time DVI/HDMI to Acer monitor and HDMI/HDMI to Sharp tv, restarted, and again up scaled, but this time for the Acer monitor. Hope this helps.

I have the same problem on El Captain. But I do not have option to gather windows. System does not see second monitor (although it is displaying garbage there).

Is there a way to enable the second monitor? My main display is connected via HDMI and the second one via DVI.

Did you ever fix this.??. I am having this issue as well..

No :/.

Hey.. I just fixed this yesterday

I found an old post on here.. So, here it what I did:

Boot with both monitors connected, one will be garbled..

On the good monitor, go to system prefs >Displays

then click on gather windows.. You should have two boxes (one for each monitor).. On the box for the garbled monitor, click the underscan slider to the right (for me one click) and BOOM the monitor clears up and I can see both monitors.. Quit, reboot and its fixed..

I cant believe it was this simple and I lived with this for months. I was about to do drastic things around BIOS changes and SMBIOS changes, but it was simple display prefs fix..

Hope this fixes it for you..

brado32 said:

then click on gather windows.. You should have two boxes (one for each monitor).. On the box for the garbled monitor, click the underscan slider to the right (for me one click) and BOOM the monitor clears up and I can see both monitors.. Quit, reboot and its fixed..

Click to expand...

Could you explain what you mean by underscan slider?

thanks