Debian 9.9
4.9.0-9-amd64 #1 SMP Debian 4.9.168-1+deb9u2 (2019-05-13) x86_64 GNU/Linux
Intel(R) Core(TM)2 Duo CPU E7500 @ 2.93GHz
4GB of RAM
Twice this week, I've come home to find it completely unresponsive. I have to hold the power button to shut it down, and when it comes back up, kern.log shows a bunch of soft lockup errors.
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kernel: [668060.108000] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [ps:31104]
Everything I've found here and other places online says this is a bug that was resolved in an older kernel version, which isn't terribly helpful.
I have no idea what most of this information out of kern.log means. If someone smarter than me could point me in a direction here, I would greatly appreciate it.