Any luck with 10.7.4 power management on the i7 version of the X220? Can't get my SSDT tables fixed properly...
See my full post with the extracted tables here: http://www.tonymacx86.com/ssdt/69476-ss ... post430393
Thanks for any help!
I think I got it working with 10.7.4 - lots of trial and errors and help from this forum.
First, my Bios is 1.28 whitelist patched. When the machine boots, it reboots again at bios, then on the second try it goes through. At first it was a little scary, but I got to trust it.
My install procedure was setting up a boot disk using tonymacx86 unibeast and 10.7.0 flash drive. Once I had a bootable flash drive, I installed 10.7 (where dell 1515 wifi would not work), then upgraded to 10.7.4 using apples combined upgrader. Then, before rebooting, I ran multibeast. The key was to pick profile for "i5/7 over clocked" besides all the standard needed kexts (read the beginning of this thread). Sometimes I would get a failure to complete, but that was never a problem later. After restart I would get semi-functioning OSX machine. Then I would copy Peroxides latest STDT.aml file - that would enable brightness slider, get a patched appleHDA.kext for sound and patched for 10.7.4 appleRTC.kext to get sleep to work properly.
My computer shows up as i7 2.7 (I think, I'll check later tonight). Aperture runs smoothly, and so does Airdrop. I used display port with 10.7.3, it still might work with 10.7.4 (not tested yet). Watched couple movies with VLC - speakers are not the loudest, but useable; headphones work much better. Skype works well with video. I use apples wireless mouse.
I tried editing my own DSDT, but I was getting errors and was not sure how to go around them, so I just use Peroxides one. I also use kexttool from his Extra folder. If I tried just placing Peroxides Extra folder and running kexttool, I would get a kernel panic in 10.7.4. I think some of the kexts are not up to date for 10.4.7, but that folder gives me ideas what is needed for a working install.
Again, good luck and happy "hacking". If everything just worked out of the box it would not have been as satisfying.
BTW, as machine is booting, I came across "searching for wireless mouse" and "keyboard". As I do have a wireless mouse, I was able to get through it, then I would plug in apple keyboard to go through the second "search". There must be a way to spoof the computer without having actual apple hardware, but because I do, that's what I did.
Update: Hooked up Apple 20" monitor with a Display Port adapter, it works great. With external monitor on X220 no longer sleeps when the lid is closed, it can still be used with external keyboard/mouse. Got Photoshop CS6 installed, no problems.
"About this Mac" tells me 2.69 Ghz core i7, just what it supposed to be.