How to send a bhyve vm totally in background,suppressing any message produced by the bhyve script that I use.

Hello.

I want to boot a bhyve vm that does not produce any error message or
warnings on the screen and that it stays in the background. This is how I
launch my Linux vm :

bhyve -S -c sockets=2,cores=2,threads=2 -m 8G -w -H -A \
-s 0,hostbridge \
-s 1,virtio-blk,/mnt/zroot2/zroot2/bhyve/img/Linux/Ubuntu2304.img,bootindex=1 \
-s 11,hda,play=/dev/dsp,rec=/dev/dsp \
-s 13,virtio-net,tap19 \
-s 14,virtio-9p,sharename=/ \
-s 30,xhci,tablet \
-s 31,lpc \
-l bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI_CODE.fd \
vm0:19 > /dev/null &


I've thought that "> /dev/null" means that every message produced by the
script would disappear,but,instead,it produces the following messages that
I want to suppress :

marietto@marietto:/bhyve # wrmsr to register 0x140(0) on vcpu 0
wrmsr to register 0x140(0) on vcpu 2
wrmsr to register 0x140(0) on vcpu 4
wrmsr to register 0x140(0) on vcpu 6
wrmsr to register 0x140(0) on vcpu 1
wrmsr to register 0x140(0) on vcpu 3
wrmsr to register 0x140(0) on vcpu 5
wrmsr to register 0x140(0) on vcpu 7
rdmsr to register 0x64e on vcpu 1
rdmsr to register 0x34 on vcpu 1
rdmsr to register 0xc0011029 on vcpu 7
Unhandled ps2 mouse command 0xe1
Unhandled ps2 mouse command 0x0a
Unhandled ps2 mouse command 0x01
Unhandled ps2 mouse command 0x41
Unhandled ps2 mouse command 0x88
rdmsr to register 0x64d on vcpu 5
rdmsr to register 0x64d on vcpu 0
at this point it hangs.


I should press a key to have the ability to write again on the terminal. I
don't want it. Someone can help me to refine the script ? thanks.

-- 
Mario.