Why I am unable to disable NMI watchdog using sysctl command on RHEL-5 ?

Solution Verified - Updated -


  • Why disabling NMI watchdog using command "sysctl -w kernel.nmi_watchdog=0" given an error: "kernel.nmi_watchdog is an unknown key" ?
# sysctl -w kernel.nmi_watchdog=0
error: "kernel.nmi_watchdog" is an unknown key


  • Red Hat Enterprise Linux 5
  • kernel-2.6.18-194.el5 and earlier
  • kernel.nmi_watchdog

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