Intel(R) 8 Series/C220 Series SMBus Controller - DriverIdentifier

In FreeBSD’s pciconf -lv output, you would see the device. A patched kernel would reference a custom ahci_chipset.c entry with a quirks flag like AHCI_Q_ALPM_DISABLE for this specific subsystem.

Add the line: %PCI\VEN_8086&DEV_8C22&SUBSYS_309F17AA.DeviceDesc% = ... if it is missing. Ensure PCI\VEN_8086&DEV_8C22&SUBSYS_309F17AA is listed. Conclusion

: A known issue exists where Windows Update replaces functional Intel SMBus drivers with generic system definitions. This strips away advanced power management and SMBus features.

If you can share your , I can help you locate the exact driver page.