I need to reset my monitor in order to see Yosemite login screen

[mywhitenoise]

I'm not sure which section to post this under, I'm assuming Graphics...since my display is connected to my graphics card. Whenever I boot up Yosemite the status bar gets about 25% through, and then the signal cuts out. I have to turn off my monitor, and then turn it back on to see the login screen. I also get an update nag from NVIDIA every time I log in, even though there is no update.

My build is a GA-Z97X-UD5H, i5-4690K, GA GTX 970. My monitor is an Acer K272KHUL, I'm using a Display Port connection.

Under Bios features I have my Boot Option Priorites set to...
Option 1: UEFI 250GB SSD (Mac OS Yosemite)
Option 2: UEFI 120GB SSD (Windows 8)
Option 3: P0 250GB SSD (Mac OS Yosemite)
Option 4: P1 120GB SSD (Windows 8)

Everything's set to optimized defaults except VT-d which is disabled, and my memory profile selected to "profile 1". Any idea what's going on? Windows 8 boots up fine without a monitor reset.

 

[mywhitenoise]

bump

 

[cccip]

Set OS type to "Windows 8" and make CSM to "Never" in UEFI BIOS

 

[mywhitenoise]

When I do that it says "No bootable device is detected. System will enter the BIOS Setup Utility." I have the boot options set to "UEFI 250GB" for the first boot option (Mac OS), and "UEFI 120GB" (windows) for the second.

Before I changed it, my "Windows 8 Features" was set to "Other OS". My first boot option was "P0 250GB" (Mac OS), and "P1 120GB" (Windows) as my second.

 

[cccip]

This is related to the boot type. Set it to Legacy then to see P0 and P1 options

 

[mywhitenoise]

There's no option to do that when you select CSM to "never". So I tried leaving CSM to "always" with P0 and P1 as my first two options, but I still have to reset the monitor.

 

[cccip]

Looks like disabling CSM turns off legacy boot.
So if you still want to resolve the issue - move from Chimera to Clover UEFI boot loader. If everything done well, you won't have to reinstall OS keeping all data.