Iru DogAt last, I found a bit in EC RAM that is used to enable EC ACPI, so ACPI is working now. I copied the ASL code from vendor DSDT, and now battery, AC, and lid status change can be detected by OS now.
ACPI is working now
A project log for Porting coreboot to HP Elitebooks
Porting coreboot to HP Elitebooks.
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