No display after wake from sleep

[rich]

Recently my display won't work after I wake from sleep, I have to turn off the PC and unplug the PSU for a few seconds to get the display to work.

Not sure when this started to happen, maybe after I fiddled with Chameleon or some Extra files, or after 10.7.4. I tried using ATI6000controller from 10.7.3, GY=No and darkwake=0 (found from some searching), but not working. How can I get the screen to work after sleep!? :?

What I use is in my sig and here is my boot plist and smbios. Thanks!

	<key>Kernel</key>
	<string>mach_kernel</string>
	<key>Kernel Flags</key>
	<string></string>
	<key>DSDT</key>
	<string>hd(0,1)/Extra/DSDT.aml</string>
	<key>Graphics Mode</key>
	<string>1920x1200x32</string>
	<key>GraphicsEnabler</key>
	<string>Y</string>
	<key>UseKernelCache</key>
	<string>Y</string>
	<key>EthernetBuiltIn</key>
	<string>Y</string>
	<key>Boot Banner</key>
	<string>N</string>
	<key>Quiet Boot</key>
	<string>Y</string>

	<key>SMbiosvendor</key>
	<string>Apple Inc.</string>
	<key>SMbiosversion</key>
	<string>MP31.88Z.006C.B05.0802291410</string>
	<key>SMbiosdate</key>
	<string>11/06/2009</string>
	<key>SMboardmanufacturer</key>
	<string>Apple Inc.</string>
	<key>SMboardproduct</key>
	<string>Mac-F42C88C8</string>
	<key>SMfamily</key>
	<string>Mac Pro</string>
	<key>SMmanufacturer</key>
	<string>Apple Inc.</string>
	<key>SMproductname</key>
	<string>MacPro3,1</string>
	<key>SMserial</key>
	<string></string>
	<key>SMsystemversion</key>
	<string>1.0</string>

 

[rich]

Ok I found out the reason; I returned from an overclock of 3.2 GHz (1600MHz RAM) to my default 2.66 GHz and my display returned on wake!

But now I can't overlock does anyone know the reason behind this and how I can get my over clock back and still have wake from sleep?