I have been using this build (and sleeping it) for months without a problem. Yesterday I upped the RAM from the pre-installed 4gb across 2 sticks to 8gb across 2 sticks....
Machine boots fine and is fast and stable in the OS....
When I now sleep the machine it will go down fine, but on wake it just dies. A reboot is required.
From the logs: /var/log/pm-suspend.log
Previous to RAM upgrade: (EXAMPLE of sequence)
/etc/pm/sleep.d/action_wpa suspend suspend:success. Fri Apr 1 16:29:00 EST 2011: performing suspend Fri Apr 1 18:50:18 EST 2011: Awake. Fri Apr 1 18:50:18 EST 2011: Running hooks for resume
After to RAM upgrade:
/etc/pm/sleep.d/action_wpa suspend suspend:success. Sat Apr 16 22:16:12 EST 2011: performing suspend Initial commandline parameters: Sat Apr 16 22:45:09 EST 2011: Running hooks for suspend.
There is no 'Awake' reference – this is now replaced with the commandline parameters??