On Sat, May 30, 2020 at 07:23:58PM +0200, Jan Stary wrote: > This is current/amd64 on a macbook2,1 (dmesg below). > It has two RAM slots, each holding a 2GB module:
if you like using older Apple HW then https://everymac.com/ is a very good resource. searching Macbook2,1 reveals the HW issue. this specific limitation https://everymac.com/systems/apple/macbook_pro/faq/macbook-pro-core-2-duo-3-gb-memory-limitation-details.html > > spdmem0 at iic0 addr 0x50: 2GB DDR2 SDRAM non-parity PC2-6400CL6 SO-DIMM > spdmem1 at iic0 addr 0x52: 2GB DDR2 SDRAM non-parity PC2-6400CL6 SO-DIMM > > But of one of the 2GB, only 1GB is seen: > > real mem = 3171909632 (3024MB) > > I have tried swapping the mdules, it only happens > in one of the two slots. If I put a 1GB module in there, > the available memory is the same (in the other slot, > 2GB is 2GB and 1GB is 1GB). > > Why is this? Does it have anthing to do with > the memory map conflicts I see in the dmesg? > ~rgc
