This is for those of you who have the USB controller.

I found something that may or may not be of use and needs some testing by others.

If in CGminer you are getting

-- Sync Error
-- Unexpected ??

Try this:

1. Shutdown CGminer (Yes I know it has hot-plug)
2. Unplug and re-plug the USB Controller (power-cycling a powered hub may work)
3. Restart CGminer.

Please report back.

After I had power cycled the Prisma itself 3 times and this problem did not go away I was frustrated and tried this thinking what could happen and it fixed the problem.  I am thinking their may be some sort of initiation issue in ASICMiner's code they gave the CGminer folks.  Causing a already initiated USB-to-Serial device to not correctly re-initialize.