You might be seeing an issue with the ram controller setup. I've seen a very similar issue where RAM just seemed to work fine until you would set up the MTRRs, creating a higher load on the RAM controller.
You should compare the registers of MCHBAR (See inteltool) between coreboot and the original BIOS. I suspect that tje i945GC was only tested with Atom processors whereas Intel Core CPUs were tested with 945GM chipsets. on another note, did you add select NORTHBRIDGE_INTEL_SUBTYPE_I945GC to your mainboard Kconfig? * CTO of SPCTNC <[email protected]> [130429 14:28]: > How do you do. > > Thank you for your effort for supporting coreboot. > > I saw your patch to coreboot for LGA775 soket. > > > > I 'm porting Coreboot to Gigabyte GA-945GCM board(LGA775 socket, i945GC > northbridge). > > In my view, Coreboot does not support LGA775 perfectly. > > Coreboot seems to have several problems with LGA775. > > In my case, when it calls wbinvd on "smm_init" function(southbridge/intel/ > i82801gx/smi.c: Line352), > > , system goes away. > > > Have you ever seen any board on which Coreboot works well? Yes, about 250 different ones. Stefan -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot

