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There's a Wifi/Bluetooth sub-section in the R&D forum

ModCD uses Nawcom's legacy/AMD kernel by default. You need to copy that over to your HDD's SL installation, knowing that Nawcom made a legacy/AMD version for each specific Snow Leopard update. At present, all you have on your SL partition may be the standard/vanilla kernel which does not support any AMD CPU. Backup your vanilla kernel (found at HDD's root as mach_kernel) as /vanilla_kernel before you copy the legacy/AMD kernel as /mach_kernel to your HDD. Then reboot with -f flag to ignore cache and once at the SL desktop, open up a Terminal window to rebuild cache with command sudo touch /System/Library/Extensions. Wait a few minutes for the cache to rebuild. You should then be able to boot safely with full kext/kernel cache from there on. Update directly to 10.6.8 using Apple's combo update and remember to copy Nawcom's 10.6.8 legacy/AMD kernel before you reboot. You'll find all Nawcom's kernels with your friend Google. There are copies on this forum + links to Nawcom's repository too. Use the Search tool.

Isn't the guide specific enough? You use myHack v3.3.1 + provided pack + Haswell-patched kernel, that's all. Once Mavericks is installed, remove AppleHPET kext and rebuild cache so that all USB ports work.

I'm surprised to read about you apparent memory-linked issues; I've not encountered that at all... Which Chameleon version are you using? The CPU speed is just a cosmetic matter and is probably due to the Chameleon version you're using. Later releases such as r2401 will show the nominal CPU speed (say 2.6GHz for a i5-4300M) when ealier releases such as r2377/r2395 will show the turbo speed (say 3.2/3.3GHz for a i5-4300M). This being said, it bears no influence whatsoever on the actual speed of the CPU or CPU throttling/speedstep. Regarding the Extra folder, yes you should install it with myHack->Create Extra. Alternatively, you can simply manually copy the files and follow-up with a myFix (quick). PS: we have model-specific support sections in the forum; ideally, that's where you should have posted this thread.

The screen wake problem is a known issue that affects NVS 110M/120M-based Dell Latitude D models. Best workaround is to align it screen sleep with computer sleep to avoid black screen on screen wake. An "on the fly" fix consists of pressing Fn-ESC on screen wake to put computer to sleep and then wake the computer immediately. Screen then wakes properly.

That keyboard/mouse issue is usually due to the presence of a bluetooth adapter. The recommendation is to disable it initially in BIOS and only activate it when the OS has been fully installed. The BT setttings can then be configured not to look for a bluetooth keyboard & mouse.

Mmm, try this pack instead (different FakeSMC + PS2 kexts). Alternative_Extra_D820_Lion.zip

Check that your BIOS is properly configured. Refer to the D620 settings, they'll be more or less the same. You're trying to install 10.7.5 and I verified the pack I uploaded on my D620 nVidia. You could maybe check the Chameleon version you're using. You can safely update to version r2377 or r2395, they'll work just fine.

Unfortunately, the published D820 Lion bootpack is unsuitable: 64bit only FakeSMC, wrong SMBIOS plist, incorrect boot plist, missing and wrong kexts... Please use the attached pack to replace your existing /Extra. It contains everything you need (LAN, audio, battery, CPU Power management, full QE/CI, etc.) without further need of EDP tuning. Removed: Extra_D820_Lion-10.7.zip

Using the bootpack is the right way to go, but I'm pretty sure FakeSMC 6.8.1307 did not get released as a 32-bit or fat binary, so this would exclude the 32bit kernel mode required on the D820 to support graphics acceleration (there's not 64bit support for NVS 120M). Did you re-run myFix (quick) after replacing the FakeSMC kext? It's required... Boot with flags -f -v; that'll ignore the cache.

Seems your Hackintosh does not like the current FakeSMC (and associated plugins) version you're using. Which is it? For 32bit mode OS X versions on such "legacy" systems as your D820, our recommendation is to use Kozlek's 32/64bit FakeSMC v5.2.678. It works flawlessly and will support all the underlying hardware; there's no need for a more recent and fancier version. Look things up here.

MacBookPro8,1 is not really a good profile for a D series model such as the D830. Ideally, opt for MBP5,1 SMBIOS and you'll ensure your CPU SpeedStep + GPU throttling are optimised.

As usual, if you want support, you're going to have to be more specific. What are the specs, what did you do, what error message did you get, where does installation fail, etc. ?

Yosemite native/vanilla nVidia drivers work OOB for the integrated NVS 135M. There's no need for the CUDA driver as far as I know, in fact I do not even think that the CUDA driver supports the GeForce 8400M chip on which the NVS 135M is based. If you look at all the past CUDA drivers that listed specific supported chips, you'll see that from v3.1 of July 2010 to v5.0.45 of March 2013, the only supported chips of the 8M Series were 8800M and 8600M. GeForce 8400M was never listed as a CUDA-supported model.

Sounds like you need to use the Haswell patched kernel or patch the vanilla kernel through Clover.

Use the Mavericks guide for reference and use the kexts provided in the pack.

With a little search... https://osxlatitude.com/index.php?/topic/2673-performance-tuning-with-fakesmc/

All details are in the thread on the forum.

myHack never deletes the DSDT, that would have been something else you did. If you did myHack->Create Extra pointing to the special ML pack, then there's no way to go wrong. Re: performance tuning, just follow the guide.

Set your BIOS parameters as per recommended settings in the pinned thread on the matter and disable or remove your wireless card if you have an Intel one.

You have the correct settings and kexts, nothing wrong there. I have the same symptoms on my D630n but not as bad as you, it's much more occasional. I've never managed to identified the root cause of this. You could try to repair file permissions through Disk utility, then rebuild your cache. It may improve things a little. IOATAFamily kext is not required on the D830.

The guide is the "Supported models with guides" section of the forum. P & C states are enabled through Chameleon. Use the Chameleon Wizard. In fact, look for the thread and article about performance tuning and you'll find all you need to tune your D630.

Use the special guide based on the MLPF hack.

If your USB key does not boot, I guess you did not install Clover properly.

Yosemite can be hard enough for experienced Hackintoshers, so for beginners, it's going to be a challenge. 1st you'll need an existing Hack or a Mac and a copy of downloaded Yosemite installation app. Then you'll need to follow the process detailed in that link I posted to create your USB installer. Then you'll have to try, try, retry and retry again until you eventually manage to boot the USB installer and hopefully install Yosemite. Then, you'll have to tune your installation because not everything will work in the 1st place.