Comment 42 for bug 1464917

Tokes,
Your description of behavior is exactly as mine. The longer up time the more it is likely to hang. Also when it hangs the cpu begins to crunch a lot of operations and the fan starts higher and higher rpm. I get the same fan behavior when I 'sudo swapoff -a' as stated above prior to my shutdown as I do when I simply try to shutdown without running 'sudo swapoff -a' command.
The difference is the shutdown completes as it should if I take the time to run 'sudo swapoff -a' and wait for it to complete.
Swap management does seem to be pointing toward the direction of the issue.