Linux kernel: Uhhuh. NMI received for unknown reas

    Uhhuh. NMI received for unknown reason 30.
    Dazed and confused, but trying to continue
    Do you have a strange power saving mode enabled?

    Uhhuh. NMI received for unknown reason 20.
    Dazed and confused, but trying to continue
    Do you have a strange power saving mode enabled?

Q. I've upgrade my CentOS / RHEL (Red Hat Enterprise Linux) 4.7 on HP ProLiant DL580 G5 and it is showing unknown NMI errors in the logs:

Uhhuh. NMI received for unknown reason 30.
Dazed and confused, but trying to continue
Do you have a strange power saving mode enabled?

Uhhuh. NMI received for unknown reason 20.
Dazed and confused, but trying to continue
Do you have a strange power saving mode enabled?

How do I fix this error?

A. This is caused when the system is hanging under load. Add any one of the following to you /boot/grub.conf file:

1. Disable the NMI watchdog by adding "nmi_watchdog=0"
2. Disable the high precision event timer (HPET) by adding "nohpet"