"unknown NMI" error messages on HP ProLiant DL580 G5 running Red Hat Enterprise Linux 4.7

Solution Verified - Updated -

Issue

After updating to Red Hat Enterprise Linux 4.7, HP ProLiant DL580 G5 systems are showing the following unknown NMI errors in the logs:

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

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

This also results in instability under load or prevent the system from successfully booting.

Environment

  • Red Hat Enterprise Linux 4.7
  • HP ProLiant DL580 G5

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