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.
Categories:
hwertz
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.
kimconnect
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.
reefland
Getting this message on a Ryzen V1756B quad core, Ubuntu 22.04.4. Had K3s running on it, but mostly idle.
kimconnect
this appears to be a transient (non-fatal) error.