You can safely disregard the error message: “Uhhuh. NMI received for unknown reason […] .”
This error message might show up in, for example:
- The log file
/var/log/syslog. - The output of the command
dmesg. - The output of the command
journalctl.
The error message results from a bug in AMD’s newer processors, including processors used in our servers. The bug has no impact other than causing the “NMI received for unknown reason” error message to appear in system logs.
Tip
To learn more about the “NMI received for unknown reason” error message, see:
-
The Linux Kernel Mailing List (LKML) discussion about the bug.
-
The patch that suppresses the error message in newer versions of the Linux kernel.