[mythtv-users] a new type of error

[Michael T. Dean]

On 03/08/2018 06:31 PM, James Abernathy wrote:
> I’ve setup my mythtv backend to daily optimize and backup the 
> database.  I have it email me with the results.  So when I don’t get 
> the 2 emails at 7:35am each day, I go looking for problems. The system 
> still records problems and the frontends work for viewing.
>
> What I’ve seen lately is I can’t ssh or login at the PC console of the 
> backend, and I get errors on the console like:
> Mar  7 12:11:47 mythbuntu kernel: [317584.873671] NMI watchdog: BUG: 
> soft lockup - CPU#4 stuck for 22s! [TFWWrite:25774]
> Mar  7 12:12:15 mythbuntu kernel: [317612.872998] NMI watchdog: BUG: 
> soft lockup - CPU#4 stuck for 23s! [TFWWrite:25774]
> Mar  7 12:12:55 mythbuntu kernel: [317652.872033] NMI watchdog: BUG: 
> soft lockup - CPU#4 stuck for 23s! [TFWWrite:25774]
> Mar  7 12:13:23 mythbuntu kernel: [317680.871359] NMI watchdog: BUG: 
> soft lockup - CPU#4 stuck for 22s! [TFWWrite:25774]
>
> The Host name is mythbuntu.  It’s a Ubuntu 16.04 system
>
> Once I reboot, the system works fine and I get my optimize emails 
> after a short time.  But a day or so later I notice this problem 
> again.  I have not changed anything, but I have done some updating 
> using:  apt update and apt upgrade.
>
> Any ideas??

Power issue?  Unless it's a bug in a kernel or a misconfigured virtual 
machine, it could be caused by anything from a failing CPU (not too 
common) to a failing PSU (pretty common) or a failing motherboard 
(generally having issues delivering power/providing a stable vcore).

Mike