Michael Büchler has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/45317 )
Change subject: mb/asrock: Add ASRock H77 Pro4-M mainboard ......................................................................
Patch Set 4:
(1 comment)
Patchset:
PS4: Alright so the good news first, I was able to fix the board. The new Super I/O wasn't enough, I also replaced Q812, a p-MOSFET that switches off 3.3V to a bunch of components during deep S5. I'm not 100% sure if it was broken or even related to any issues. The total stick through my legs was that some of my SPI flash chips seem to be bad. Only one chip can boot with coreboot or the vendor BIOS, the other two fail somewhat randomly early on. Externally reading them is 100% correct though. Some OTP bits? I didn't investigate any further.
The bad news is that I had to deploy the board in my father's PC so (a) I don't have regular access to test things and (b) his installation of Windows 10, which was originally Windows 7 or even Vista on an ASRock 4CoreDual-SATA2, doesn't come back from S3. I don't have a serial log yet. A clean installation of Windows 10 does resume properly though, as does Linux.
Other than that the board seems to be working nicely so I'm pushing the current state.