Comment 8 for bug 1327110

On the fifth trace suspend I got the picture back on screen but the computer totally froze, not even REISUB would restart it. This is a bit different from when I close the laptop lid because then the computer keeps working but I get a black screen until I restart lightdm. Attached is the dmesg output after that hang, perhaps it can help.

I do find this which seems to be similar to what I'd expect to find according to the resume t race instructions in your link.
[ 2.072557] Magic number: 0:381:403
[ 2.072562] hash matches /home/apw/COD/linux/drivers/base/power/main.c:803
[ 2.072608] power_supply BAT0: hash matches