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Kernel Boot Parameters “hpet=disable” and “nohpet” (Doc ID 1918402.1)

Last updated on APRIL 23, 2020

Applies to:

Linux OS - Version Oracle Linux 5.0 and later
Oracle Cloud Infrastructure - Version N/A and later
Linux x86-64
Linux x86


Kernel boot parameter HPET (High Precision Event Timer) is used for specifying hardware timer/clock source.

HPET is not available for all sorts of hardware, and some HPET clocks are considered unreliable.

This document describes how to disable HPET with kernel boot parameters “hpet=disable” and “nohpet”.


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