The problem is that, on crash the kernel drops crash messages on the tty0 console and reboots immediately, making it impossible to read them. (they are not saved in /var/log/console.log for some reason). According to https://lists.freebsd.org/pipermail/freebsd-questions/2009-July/202210.html, if debugging enabled in the kernel (KDB, DDB), setting debug.debugger_on_panic: 1, should prevent the system from auto-reboot on crash. Apparently this is not working, at least for me. Also I've set kern.panic_reboot_wait_time=-1, with no apparent effect. One way to trigger system crash on 11.2 is to load the vboxdrv (installed from pkg 'virtualbox-ose-kmod-5.2.8', not compiled from source). This will crash the system reproducing the behavior described above. Any help is highly appreciated. Ali