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Default to enabling the serial console in addition to the video console in /etc/loader.conf.

Joe apache2 requested to merge apache2/HardenedBSD:bootloader_serial_support2 into hardened/current/master

Change default speed 115200 (as opposed to 9600). Add an entry for /dev/ttyV0.0 (virtio / Linux KVM) "onifconsole" to enable serial console out-of-the-box for Linux KVM.

The comconsole setting makes the kernel emit messages at boot (and while running). A slightly less invasive option would be to have ttyV0.0 set to "onifexists" instead (enabling interactive logins, but no console message output).

Relevant reading:

  • Handbook section 27.6.3: Setting a Faster Serial Port Speed
  • man 8 loader
  • FreeBSD D29873 (which adds a Xen-compatible virtual serial console entry)

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