It is hard to debug an ACPI problem from code I believe, but I would recommend to capture the memory dump and using windbg to analyze the dump file directly. That shall be easy for you as the following step 1.When system can boot up with GPU,Select "Complete Memory Dump" in "Start and Recovery" and then shutdown. 2.Plug in GPU and boot up system to hit 0xA5 BSOD, waiting for crash dump to be finished and then shutdown system. 3.Take out the GPU card and boot up into system again, using windbg to analyze the dump file, normally that will be much easier to get useful information.
You can share the dump file if you want, people can take a look at it together.
Lance
vladocb via coreboot coreboot@coreboot.org 于2019年6月14日周五 上午1:26写道：
Hi, I'm trying to boot Windows 10 with Coreboot 4.9.2002 using Tianocore + a PCIe GPU and I always get an strange ACPI_BIOS_ERROR.
Without the PCIe GPU, works ok.
I'm pretty sure is an error with my DSDT or the southbridge code. Sadly, I cannot debug Windows to know determine the exact ACPI problem. I also tested with other boards like the Asus Maximus IV GeneZ and the problem is there too: with the IGP only works, but when I attach a PCIe GPU then it crashes.
Take a look to my code if you want, any help about this will be welcome. https://review.coreboot.org/c/coreboot/+/33328
Thanks.
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