As Chase Douglas said, reloading the usbhid module will get it working.
You can put this into a script to be called by pm-utils. I've provided the instructions on how to do so in this Ubuntu Forums thread:
http://ubuntuforums.org/showthread.php?t=1952532
You'll just need to edit the script so it reloads the right module, so; replace 'usbhid' with 'bcm5974' or whatever module you're using for the trackpad :)
As Chase Douglas said, reloading the usbhid module will get it working.
You can put this into a script to be called by pm-utils. I've provided the instructions on how to do so in this Ubuntu Forums thread:
http:// ubuntuforums. org/showthread. php?t=1952532
You'll just need to edit the script so it reloads the right module, so; replace 'usbhid' with 'bcm5974' or whatever module you're using for the trackpad :)