Issue #327 has been updated by Mat Phillips.

Paul Menzel wrote in #note-9:
> @Mat, on what board did you test?
> 
Thinkpad x230. I7 CPU (doubt that's relevant though) The dmesg file attached to 
this ticket is from that laptop.



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Bug #327: MBOX3, OperationRegion (OPRG, SystemMemory, ASLS, 0x2000) causes 
windows uefi tianocore BSOD ACPI_BIOS_ERROR
https://ticket.coreboot.org/issues/327#change-980

* Author: xinhua wang
* Status: New
* Priority: Normal
* Start date: 2021-12-30
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https://review.coreboot.org/c/coreboot/+/27711/7/src/drivers/intel/gma/acpi/configure_brightness_levels.asl#28

this line .. OperationRegion (OPRG, SystemMemory, ASLS, 0x2000)
the 0x2000 will cause BSOD ACPI_BIOS_ERROR when booting installer, os, etc

When set to 0x1000 windows UEFI tianocore mode boots fine



---Files--------------------------------
dmesg.txt (76.9 KB)
results.log (204 KB)


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