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I have been running my Antminer U1 and U2's off my Windows install for a while and I decided to switch this ASIC-controlling laptop to Debian instead.
I am currently running 3 Gridseeds off it (/dev/ttyACM0-2) and I am working on getting a GawFury to run as well. The same laptop ran everything under Win7 x86. (However not as smooth as i wished, the cgminer3.11 version for GawFury is horrible)

I've compiled bfgminer 3.10, 3.59 and 4.2.1 to try to run the Antminers. (They ran under 3.10 on Windows.)
I've compiled bfgminer 4.2.1-DarkwindE (spelling?) to try and run the GawFury.

However, what is happening is that I can plug in at most 2 Antminers before I get problems.
The GawFury wont detect properly no matter what i do with it. The system will add ttyUSB0 1 or 2 for it. I never get ttyUSB3 added to /dev for some reason, which i should because they all use the same SiLabs cp210x driver.

All *four* cp210x devices get detected as /dev/ttyUSB0-2. Does not matter what order i plug/unplug and confiruge them in.
They all appear on running lsusb. I have tried to run these devices by specifying USB ID's ("usb" : "7:12,7:13....")

When plugging in Antminer #2 or #3, one of the other Antminers will disconnect after 1-2 secs and fail to reconnect, *OR* the device I insert will just give me 'failed to open /dev/ttyUSB2'. So its completely random which device will fail when i plug in additional antminers.

The GawFury refuses to do anything at all. I have tried to specify the device by 'zeus:/dev/ttyUSB0' and just '/dev/ttyUSB0'

I've tried recompiling cp210x.
I've tried probing the drivers.
I've tried to add my root account into dialup group.

Both the Fury and the one or two failing Antminers will emit a repeating series of 7 led flashes + ~3 seconds pause when they fail to detect properly.

I have no idea what to do next.
How on earth do i get this cp210x stuff to work ? I did read some post somewhere on some forum what the driver was broken in the newest Linux kernel in Debian. But I can't get this confirmed anyhere.
Hope someone can help!
Thanks.

running a similar setup and waiting my gawfurry to be delivered update this thread if you find a solution
please

Try the official driver from BFGMiner (in the ZeusMiner branch) or wait for a release. The other BFGMiner forks (last I checked) assume that any cp210x device is a ZeusMiner ASIC.