Please disregard my info about MC error.
The kernel is crashing in function
acpi_battery_sysctl()
as indicated in the trap info due to division error. You won't fix this by reading handbook (but you should use handbook to get yourself familiar with the FreeBSD).
You can/should open a problem report (
PR) to let the developers know. Please do check the howto on that page to get familiar with the process.
Before that make sure that:
1) you are using GENERIC kernel (which you confirmed you are using default installation)
2) you have up-to-date FreeBSD running (so either 12.3, 13.0, 13.1)
3) you have dump available (vmcore.N in /var/crash, maybe zipped ; N is the number starting from 0)
When you open a PR you can share the information about the system (hw details, FreeBSD details), possibly pictures of the dump you have a the actual dump file.
In the dump pictures you shared I see dump completed so if you have enough free space in /var/crash you should see a proper dump there. You don't need debugging tools for this.
The only other PR opened for this topic was back in 2009 -
PR 122056