If the machine sleeps for more than around a minute of time (if less, then it works fine, but a minute or more and the problem happens), upon waking it, it will function for about 30 seconds (might even be exactly 30 seconds), and then bounce! And it's a seriously hard bounce, no warnings or error screens of any sort, just BLAM! black, and then reboot of course.
I just updated my 755 SL (10.6.8) system to ML (10.8.4) (fresh install, not ugrade) and have everything working great except for sleep and the app store. I've always had a problem with sleep in SL where it would go into S3, but it would take a few minutes to come back after waking up. (And it would only wake using the front panel power button, not USB.)
I've used all of the DSDTs provided by the OP hoping that it would fix the problem. I had high hopes when the system woke up using USB, but I'm having the exact same problem as catalystTGJ described above. Has anyone been able to fix this problem or know where to start? Thanks.
System: Dell Optiplex 755 MT
Motherboard: Foxconn LS-36
BIOS: A22 BIOS (also tried A16, A17, A19, A21)
Ethernet: Built in 825xx
Video: Nvidia 9400GT 1GB
MyHack v3.2 Beta 8
Chameleon Wizard v4.2.2
Chameleon v2.2 2555
DSDT (from OP)
SMBios iMac 9,1 (Chameleon Wizard)
Kexts (All in S/L/E)
Installed using ##### v5.4.3
1) FakeSMC v5.2.725
2) AppleIntelE1000 v2.4.14 (hnak's)
3) VooDooHDA v2.8.4
Installed using Kext Wizard v3.7.10
5) AppleRTC (original SL version 1.3.1)
Note: The original ML version (1.5) or ##### patched version still caused CMOS reset.