It is commonly know for i386 to have problems with ACPI suspend/resume.
AMD64 is a different story.

Check my thread, some devs explain further:


2011/8/20 Garrett Cooper <>

> Hi,
>    /etc/rc.resume with GENERIC hangs on my netbook on resume (it
> comes up with a blank black screen), so I removed all of the drivers
> from my custom $KERNCONF (except the most essential pieces, i.e. acpi,
> ata_cam, options INET, etc) and debugged the suspend/resume issue down
> SMP support (it was hanging in the ioapic code). Once I disabled SMP
> support, suspend/resume worked properly.
>    My next question: how do I fix this issue or what should I do next
> to debug it further :)?
> Thanks!
> -Garrett
> $ uname -a
> FreeBSD akai-ntbk.local 9.0-BETA1 FreeBSD 9.0-BETA1 #1 r224948M: Fri
> Aug 19 00:35:51 PDT 2011
> root@akai-ntbk.local:/usr/obj/usr/src/sys/NETBOOK  i386
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Lyubomir Grigorov (bgalakazam)
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