First the issues, than the fixes.
My usb1 (UHCI) and usb2 (EHCI) ports were showing up in system profiler as "expansion slots". This was causing 2 main problems for me. First, I had to use the power button to wake the computer from sleep. Second, if I had a usb drive plugged in when the computer went to sleep, I would get a "device removal error" when the computer woke from sleep.
I combined two different dsdt fixes I found. One fixed UHCI but not EHCI, the other did just the opposite.
I combined the dsdt fix for UHCI found here:
http://www.insanelymac.com/forum/ind...c=168014&st=20
and the EHCI fix found here:
http://www.insanelymac.com/forum/ind...&#entry1240686
Now I can wake the computer from sleep by clicking my USB mouse and I dont have to eject USB drives before putting the computer to sleep. I also do not get the "controller will be unloaded across sleep" error when booting in verbose mode.
This works great on ep-35-ds3p, but should work for most ich9 and ich10 gigabyte boards, since device id's were changed to match ich10.
Also, pay attention to the usb device with address 0x001D0003, for me it was US31, dont edit this device.