Comment 2 for bug 1958692

Updates:

- The hardware passes multiple rounds of memtest86+ over a ~10 hour window and does not reboot during that time

- When left at the BIOS screen for hours on end, it does not reboot

- The system will do the reboot cycle under all kernels I currently have installed, which includes:
5.14.0-1020-oem
5.14.0-1018-oem
5.13.0-27-generic
5.11.0-40-generic
5.11.0-38-generic

By process of elimination this is starting to look more and more like a Linux kernel issue.