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From: Garrett Cooper <yanegomi@gmail.com>
To: acpi@freebsd.org
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Cc: 
Subject: ACPI resume doesn't work in i386 with SMP enabled on netbook
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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