[coreboot - Bug #658] asus p5g41c-m-lx pcie discovery of realtek 10ec:8168

Issue #658 has been updated by Walter Sonius.


Perhaps the note from `src/mb/asus/p5ql-em/early_init.c` note applies?
```
/* This board has first dimm slot of each channel hooked up to
	   rank0 and rank1, while the second dimm slot is only connected
	   to rank1. The raminit does not support such setups. So only the
	   first dimms of each channel are used. */
```

Did 4 DIMM's work for you on the OEM firmware or with coreboot? If so can you check on OEM firmware with 1 DIMM at the time the output of `i2cdetect -l` lookup `SMBus` number if it resides at position 0 do `i2cdetect -r 0` type `y` and look how the hex table changes at row 50 while you move the DIMM to the next slot on the next boot till you separate tested each individual slot and logged the i2c hex. You may need to `modprobe i2c-dev ? i2c-smbus` first?

Perhaps try?:

```
spd_map[0] = 0x50; /* channel 0 DIMM 0 */
spd_map[1] = 0x52; /* channel 0 DIMM 1 */
spd_map[2] = 0x51; /* channel 1 DIMM 0 */
spd_map[3] = 0x53; /* channel 1 DIMM 1 */
```

----------------------------------------
Bug #658: asus p5g41c-m-lx pcie discovery of realtek 10ec:8168
https://ticket.coreboot.org/issues/658#change-2374

* Author: Gabriel Turlea
* Status: New
* Priority: Normal
* Target version: none
* Start date: 2026-07-14
----------------------------------------
I have tried to port coreboot to asus-p5g41c-m-lx by using the existing pg541t-m-lx variant. Everything works great except I cannot get the onboard lan realtek 10ec:8168 to be detected by coreboot. The card shows up and works once linux boots. Adding some register values in the overridetree.cb seems to disable the card even in linux. Please let me know what supporting info I should provide. 

Thank you

---Files--------------------------------
p5g41c_m-lx_cbmem.log (53.5 KB)


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