Prp0001 0: Acpi

Because of this "bridge" capability, you will often see this ID on devices that don't belong to a single brand. HP Support Community Chromebooks and Steam Decks : It is commonly found on the Steam Deck and various Chromebooks

The ACPI node is missing the compatible property, so the kernel doesn't know which driver to load. The device is ignored. acpi prp0001 0

External (_SB_.I2C0, DeviceObj) Scope (_SB.I2C0) Because of this "bridge" capability, you will often

Navigate to the device directory:

When you append this to the kernel command line (via GRUB, U-Boot, or EFI stub): External (_SB_

| | Recommendation | |-----------------------------------|----------------------------------------| | Normal server/laptop | Omit parameter (default=1) | | Embedded with custom ACPI | Likely need PRP0001 on | | ACPI table debugging | Try acpi prp0001 0 to isolate | | Security-hardened runtime | Consider =0 + ACPI table signature validation | | You see "PRP0001" in dmesg errors | Test =0 to confirm AML issue |