GA-X99-UD3 screen goes black in idle mode and system needs reset

[Allubz]

Dear everyone,

 

I've built a system with the following specs and installed 10.10.5 on it which is running splendid:

 

GA-X99-UD3

5820K

GTX 980 4GB

32GB Crucial CT4K8G4DFD8213

Samsung EVO 750 500GB

4TB HDD

 

The problem is that the screen goes black after a while in idle and then becomes unresponsive, needing a reset. All power management options are disabled, so the screen, HDD, or system should not sleep/hibernate.

 

The problem only occurs when not working with the system, in idle mode.

 

I'm running the latest Chimera.

 

This is all the information I can  currently supply, because I'm not at the system. I expect to be able to deliver more information tomorrow, if requested.

 

Maybe someone can shed light on this problem already?

 

 

Many thanks!

 

Al

 

 

PS: Please move to Yosemite post-install. 

[Allubz]

chameleon.Boot.plist:
 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>EthernetBuiltIn</key>
<string>Yes</string>
<key>GraphicsEnabler</key>
<string>No</string>
<key>IGPEnabler</key>
<string>No</string>
<key>Kernel Flags</key>
<string>kext-dev-mode=1 npci=0x3000 nvda_drv=1</string>
<key>Legacy Logo</key>
<string>Yes</string>
<key>Timeout</key>
<string>1</string>
<key>UseKernelCache</key>
<string>Yes</string>
<key>HDEFLayoutID</key>
<string>01000000</string>
<key>HDAEnabler</key>
<string>Yes</string>
</dict>
</plist>

SMBIOS.plist:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>SMfamily</key>
<string>Mac Pro</string>
<key>SMproductname</key>
<string>MacPro3,1</string>
<key>SMboardproduct</key>
<string>*removed*</string>
<key>SMserial</key>
<string>*removed*</string>
<key>SMbiosversion</key>
<string>url</string>
</dict>
</plist>