1# ACPI SSDT \_UID generation 2 3According to the ACPI spec: 4 5> The _UID must be unique across all devices with either a common _HID or _CID. 6 7 8When generating SSDTs in coreboot the independent drivers don't know 9which \_UID is already in use for a specific \_HID or \_CID. To generate 10unique \_UIDs the ACPI device's path is hashed and used as ID. As every ACPI 11device has a different path, the hash will be also different for every device. 12 13Windows 10 verifies all devices with the same \_HID or \_CID and makes 14sure that no \_UID is duplicated. If it is it'll BSOD. 15