type40 Posted April 30, 2014 Share Posted April 30, 2014 Hello all, I have a Sandy Bridge set-up with i5 2500 on Gigabyte GA-H67MA-D2H-B3 and minimal graphics with nvidia 8400GS. Installation is mostly working using clover as bootloader but I have a remaining power management problem. I am using SSDT generated by the usual script, ssdtPRGen.sh (with no errors upon running it) and DSDT from Tonymac repository for my board. I use DropOEM option in clover (to allow SSDT to work) and haven't told clover to generate p-states or c-states itself. Using the imac12,2 system definition (one of those recommended for Sandy Bridge) I get only two cpu states recognised in HWmonitor but intel power gadget seems to recognise more and change about as normal in terms of clock speed. Using macpro3,1 system definition I get more lower CPU states it seems but still works ok.. the problem is that temps are 5-6 degrees higher than with Snow Leopard at idle and HWmonitor displays Vcore of 1.07 all the time.. Now given HWmonitor's not displaying my clock states properly I can't be sure but I am guessing that Vcore being stuck there may be the reason. (It should be able to drop to 0.89 or so at idle I believe. So my questions are: 1. Where do I go from here to diagnose my problem? 2. I have seen people patch system definitions as these seem to affect power management - some people use macmini sysdefs for sandy bridge but I can't boot - getting stuck at video initialisation so does anyone know how to patch sysdefs or associated files in Mavericks to allow proper CPU power management? 3. If you can suggest any tricks to get my system to boot with macmini sysdef I'm all ears. (This might be a shortcut and achieve the goal without knowing what we're doing!) All the best from Australia and thank you in advance! Link to comment Share on other sites More sharing options...
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