The hardware identifier is a specialized device ID used by the Advanced Configuration and Power Interface (ACPI) to handle hardware that lacks a standard plug-and-play enumeration mechanism. It is most frequently encountered on devices like the Google Pixelbook or Chromebooks (especially when running Windows), where it often corresponds to the Google Audio SPI Device . Understanding ACPI\PRP0001
cat /proc/iomem | grep -i prp cat /proc/interrupts acpi prp0001 0
Last updated: 2025 – This article is evergreen, but kernel versions >6.0 have stable PRP0001 behavior. Always refer to your kernel’s dmesg for exact behavior. ACPI\PRP0001 The hardware identifier is a specialized device
acpi PRP0001:00: bus: acpi type: hid:PRP0001 acpi PRP0001:00: driver: gpio_keys lsmod | grep -i prp grep PRP0001 -R
It signals to the operating system that it must look inside the ACPI