Suspend/resume does not work with Nvidia graphic cards as far as I know (never tested myself).
Apart from that, it usually works very well on almost all hardware.
When using the old and deprecated
i915kms.ko driver from the base system, the system sometimes crashes during resume on some hardware.
The up-to-date
graphics/drm-kmod driver from the ports works much better with suspend/resume from my experience.
And there is an open
bug in the snd_uaudio.ko driver, that makes the computer seem to have crashed, but actually it's not, but all usb devices stall after resume if the audio device was in use.
(one can still ssh into the machine)
The
sysutils/xfce4-power-manager executes
acpiconf -s3
, you can do that manually, too.
Run that as root and it will suspend to RAM your machine (FreeBSD does not yet support suspend to disk).
Your suspend settings seem ok, as you see the console during resume, and the system attempts to resume.
Could you provide some more hardware info and paste the console messages?
Edit: only external audio devices use the uaudio driver, that wouldn't affect you if you are using something else.