[Bug 231760] FreeBSD 12.0-ALPHA7 Installations Halts at ACPI on 4 different AMD Ryzen Laptops (HP, DELL, Huawei)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231760

--- Comment #8 from Rajesh <rajfbsd at gmail.com> ---
(In reply to John Baldwin from comment #7)

Tried your patch John. But, I am not seeing the added logs.

Added the same print in "pci_cfgregread" and "pcireg_cfgread" routines and I
see the following logs before system reboots. (System doesn't hang (or) break
to debugger even with DDB and BREAK_TO_DEBUGGER options set)

ioapic0: routing intpin 9 (ISA IRQ 9) to lapic 0 vector 48
pci_cfgregread: pci4.0.2 reg 0x24 bytes 0x1
pciereg_cfgread: pci4.0.2 reg 0x24 bytes 0x1
pci_cfgregread: pci4.0.2 reg 0x25 bytes 0x1
pciereg_cfgread: pci4.0.2 reg 0x25 bytes 0x1
pci_cfgregread: pci4.0.2 reg 0x26 bytes 0x1
pciereg_cfgread: pci4.0.2 reg 0x26 bytes 0x1
pci_cfgregread: pci4.0.2 reg 0x27 bytes 0x1
pciereg_cfgread: pci4.0.2 reg 0x27 bytes 0x1
pci_cfgregread: pci4.0.2 reg 0xa bytes 0x1
pciereg_cfgread: pci4.0.2 reg 0xa bytes 0x1
pci_cfgregread: pci4.0.2 reg 0xb bytes 0x1
pciereg_cfgread: pci4.0.2 reg 0xb bytes 0x1
cc

The Device in PCI 4.0.2 is a AHCI controller. Anything else we can try here?

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