griftopia

The problem is it does not always halt at same place. Matter of fact, I once again hit language selection screen, but then mouse freezes. I will keep updating this post with screen shots when it does not reach language selection screen. Seems like some kind of "timing" issue causing it to halt maybe? I'm attaching 3 of the most common halts.

Okay so I stopped messing with NULLCPU...kext. Took your last dsdt file. Once again it halts in random places. However it always goes past initializing CPUPowerManagement and Battery Manager and SMC. Not sure if that helps you fix the DSDT some more. I'm attaching my plist files here for you in case that helps. Thanks for all your help thus far. Inspiron_1720_plist.zip

Sorry I don't have access to Snow Leopard. Trying with Yosemite right now. So first, can you please tell me what you fixed in my DSDT? Would help in my education, because I DID get further with it. I got to Apple Logo Screen, but after that I still got Kernel Panic with AppleIntelCPUPowerManagement. The message says - "No HPETs available. CPU(s) configured incorrectly". I googled and some folks suggesting I use NULLCPUPowerManagement. So I put NULL...text, but now getting random results. Booting halts at different points like it is doing something but no error message. Every time I power cycle, it stops at different place. Any suggestion?

Thank you! I will give it a shot. Question - when you say try old OS, how old? I was planning on trying Yosemite. Should I go further back, like Mavericks?

I tried doing myself but get Kernel Panic on my Inspiron 1720. I used ICH8 folder patches. No luck. My dsl is attached. dsdt_inspiron_1720.dsl.zip