Comment 42 for bug 335570

inflamestory, it seems that you misspelled the shebang in the most important script:

Running hook /etc/pm/sleep.d/20_custom-ehci_hcd resume suspend:
/etc/pm/sleep.d/20_custom-ehci_hcd: 1: !/bin/sh: not found
0000:00:1a.70000:00:1d.7
/etc/pm/sleep.d/20_custom-ehci_hcd resume suspend: success.

As you can see, the script lacks the # in front of the !/bin/sh to have the correct shebang.

Hope that solves your problem.
Regards.