aelius Posted June 10, 2014 Report Posted June 10, 2014 Quick fix 'NMI received for unknown reason 21 on CPU' on linux.Errors:pluto:~# dmesg |tail -n 3[2061941.029736] Uhhuh. NMI received for unknown reason 21 on CPU 3.[2061941.029779] Do you have a strange power saving mode enabled?[2061941.029821] Dazed and confused, but trying to continueThe solution:pluto:~# sysctl -w kernel.nmi_watchdog=0kernel.nmi_watchdog = 0pluto:~# echo "kernel.nmi_watchdog=0" >> /etc/sysctl.confRead more about NMI: Non-maskable interrupt - Wikipedia, the free encyclopedia