Wow! what a convoluted mess cgminer is...at least with GS5's... my gosh!
All that configuring and re-configuring, tech support issues like crazy!
It seems cgminer has a way to go yet to become 'user friendly' i.e. easy and convenient for most users.
I'm using cpuminer LTC only version, and running smoothly, no comm port issues, no Zadikitup to hassle with.
Just dump zadic and cgminer for GS3355 and use cpuminer for Gridseed 5-Chip ASICs with Reduced Power Usage.... http://cryptomining-blog.com/1165-download-cpuminer-for-gridseed-5-chip-gc3355-asics-with-reduced-power-usage/
Forget about all the headaches and LOST TIME AND INCOME courtesy of cgminer for GS3355...
Load up and run cpuminer, get them running and making you MONEY stably and dependably!
Headaches, hassles and wasted time gone!
I for one am not interested in being some well meaning hacker's guinea pig....
Good luck!
Wolfey2014