Debian – Kernel: Uhhuh. NMI received for unknown reason 31 on CPU 3

debiankernel

I'm receiving this error on "Linux Debian-70-wheezy-64-minimal 3.2.0-4-amd64 #1 SMP Debian 3.2.46-1+deb7u1 x86_64":

Message from syslogd@hostname at Feb 14 02:54:51 ...
kernel:[81927.464687] Uhhuh. NMI received for unknown reason 31 on CPU 3.

Message from syslogd@hostname at Feb 14 02:54:51 ...
kernel:[81927.464743] Do you have a strange power saving mode enabled?

Message from syslogd@hostname at Feb 14 02:54:51 ...
kernel:[81927.464791] Dazed and confused, but trying to continue

After I receive this, the server just reboots.

I read on some other websites that it's related to CPU hangout? But they were not helpful resources.

Best Answer

This is almost always bad hardware. Run memtest for a couple of hours since that's the easiest thing to do. From there investigate your processor, add-in cards, motherboard, etc.

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