[Bug 270883] Enable mouse on Hyper-V 2022 Gen2 VM

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270883

--- Comment #3 from fgorter <fgorter@gmail.com> ---
Same behavior is not entirely unexpected, to be honest.

Just-in-case, what happens if you remove dbus_enable from rc.conf as well?

I've experienced something roughly similar some years ago with some recently
released (2014/2015) Xeon CPUs. Executing a normal reboot from console (on bare
metal), would lead to the machine to shutdown normally (somewhat...) but not
actually boot after BIOS POST. It required a hard reset -- press and hold power
button -- to start correctly again.

Recalling from memory, I believe a switch in /boot/device.hints was required. I
forget exactly which, but I think it was to one of the hint.atrtc* knobs, to
deal with some (unclean) ACPI state quirks.

What is the make/model of your hardware? Motherboard / CPU combo.

If this is a AMD Ryzen based system, not that "hw.vmm.amdvi.enable=1" should
probably be present in /boot/loader.conf -- default FreeBSD install ships with
this knob disabled. With it disabled does allow a normal install, but with some
more advanced features switched off.

Please also double check the system BIOS for any USB-specific (legacy)
switches.

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