another explanetion of the latest part:

1. execute "sync; echo 1 > /sys/power/pm_trace; /etc/acpi/sleep.sh force"
WARNING: after this step you have only 3 minute before the debug data will be 
lost.

2. try to resume the PC and if it freeze reboot it

3. after boot, get dmesg and post it here.

-- 
Unable to Suspend/Hibernate
https://bugs.launchpad.net/bugs/163247
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