Uhhuh. NMI received for unknown reason 3d on CPU 4

Problem:

Message from syslogd@linux03 at Aug 31 04:28:21 ...
 kernel:[273033.123489] Uhhuh. NMI received for unknown reason 3d on CPU 4.

Message from syslogd@linux03 at Aug 31 04:28:21 ...
 kernel:[273033.123491] Do you have a strange power saving mode enabled?

Message from syslogd@linux03 at Aug 31 04:28:21 ...
 kernel:[273033.123491] Dazed and confused, but trying to continue

Solution: nothing… Error seems transient.

Posted on Categories Linux

2 thoughts on “Uhhuh. NMI received for unknown reason 3d on CPU 4”

  1. Just wanted to add “me too”, Inspiron 3505 with Ryzen 5 3450U (Zen 2).
    Found this https://www.spinics.net/lists/kernel/msg3870271.html where someone had an annoying number of these messages (they have a 64 core/128 thread CPU so they have many more than the occasional 1 or 2 I get with my quad-core.) They were having it show up when running perftop, and found a AMD erratum “IBS (Instruction Based Sampling) Counter Valid Value May be Incorrect After Exit From Core C6 (CC6) State”, I’m not running powertop but I suspect something on the system flips on IBS. It sounds like it doesn’t really cause any problem other than spamming the logs.

    1. Thanks for the chyme in, Hwertz

      I’m suspecting that the Ryzen CPUs have certain instruction sets and responses that current Linux kernels and performance counters aren’t expecting. Yup, the server has been up for while – so, I’ve been ignoring these spammy logs until further evidence of actual problems.

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