Yep, I swapped out cables and the unit I had that would only run @ 200 will now run at 300 and the one that would only run at 300 now seems to run at 400.
From what I can tell, autoscan of serial ports does not work under Win or Linux. Just specify the ports (e.g., -S //./COM3). For the ones that you can't get to start, did you try running a single miner as the only connected device?
Someone did tell me the following regarding their Linux...
In my brief experience, that fluctuation you see means it's not really hashing. This is what was happening to me under Win10 x64. Cgminer recognizes the device but really it doesn't work. I was able to get them all running by installing the unsigned driver from PinIdea.
I have only gotten...
What I have found when this happens is that you need to lower your frequency. You should also try running an instance of cgminer with a single device and see if that helps.
I have seen all kinds of odd behavior and this is what I eventually started doing under Win10:
1) Make sure you install...
Thought I posted this a while ago but apparently forgot to hit the POST button. I swapped out the USB driver a few times and eventually got all devices running under Win10. I've had people tell me they were successful with the default Win10 USB drivers and the unsigned PinIdea USB driver. YMMV...
Let me know if you are able to get more than 3 DU-1s operating at once under Windows. I'm running Win10 and when I hook them all up, only three will actually process shares. The other two just spin. Doesn't matter what I do. I've even tried spawning multiple instances of the app with no luck...
I think jakehaas and I are both in the US. I am in a major metro area on the east coast so when it got to New York CIty, it didn't take much longer to get it to me.