![]() USB init, open device failed, err -12, you need to install a WinUSB driver for - AMU device 8:1 USB init, open device failed, err -12, you need to install a WinUSB driver for - AMU device 8:3 USB init, open device failed, err -12, you need to install a WinUSB driver for - AMU device 6:2 USB init, open device failed, err -12, you need to install a WinUSB driver for - AMU device 3:13 USB init, open device failed, err -12, you need to install a WinUSB driver for - AMU device 3:12 USB init, open device failed, err -12, you need to install a WinUSB driver for - AMU device 3:11 USB init, open device failed, err -12, you need to install a WinUSB driver for - AMU device 3:10 ![]() USB init, open device failed, err -12, you need to install a WinUSB driver for - AMU device 3:8 USB init, open device failed, err -12, you need to install a WinUSB driver for - AMU device 3:6 USB init, open device failed, err -12, you need to install a WinUSB driver for - AMU device 3:2 USB init, open device failed, err -12, you need to install a WinUSB driver for - AMU device 3:3 In CgMiner it gives: USB init, open device failed, err -12, you need to install a WinUSB driver for - AMU device 1:3 Gives the error (in BfgMiner): usb_devinfo_scan: Error opening device: LIBUSB_ERROR_NOT_SUPPORTED What is CgMiner 2.8 doing wrong that CgMiner 2.4 did right?Įdit: Using Silicon Labs own VCP (Virtual COM Port driver): Just to preempt people who might suggest it, rather than offering any insight, i re-ran zadiag 2.0.1.162 (Updated ), and "reinstalled" the WinUSB driver for my for USB devices (and rebooted) What did they break after CgMiner 3.4, and how do i fix it? WinUSB So i am, once again, reverted to CgMiner 3.4.1. Stratum from pool 0 requested work restart FAIL: USB remove not already in use (3:2) AMU 0 SendWork usb write err:(-7) LIBUSB_ERROR_TIMEOUT Unfortunately it still does not see USB devices: cgminer version 3.8.0 - Started: Ĭonnected to diff 1 with stratum as user joesmithīlock: 70bedfe6. This morning i tested CgMiner 3.8, hoping they fixed its inability to see USB Block Eruptors (and the stack overflow). So i reverted to 3.4.1, living with the semi-daily crashes and having to remember to restart CgMiner. Waiting for USB hotplug devices or press q to quit Accepted 487047eb Diff 3/3 AMU 3īut it regularly crashes with a stack overflow.Ībout a month ago i tried to upgrade to CgMiner 3.6, but it fails to find my USB devices: cgminer version 3.6.0 - Started: ![]() It can see my four USB Block Erupters, and works: cgminer version 3.4.1 - Started: ![]() We'll get that up even higher by getting a second USB hub to use our remaining sticks, and if we do it non-stop, the Eruptors will be profitable in seven months or so.I've been using CgMiner 3.4.1 since late September. By using only some of the ports, we were able to mine at just about 4Gh/s consistently. Plus while some of them were extremely hot, some were cool to the touch.Ī million combinations of ports, spacing, and timing later, we discovered that our powered USB hub wasn't quite so powered after all.If we tried to use every port, some of them wouldn't receive enough power. Once we were successfully mining ( the Eligius mining pool has great stats) it was a long afternoon of getting as many of those Eruptors successfully working as we could.Īt first it seemed like they were all chugging along, but we noticed our hashrate was way lower than expected, and lots of rejections and hardware errors were piling up on some of the Eruptors. It takes a while for cgminer to detect and utilize all the Eruptors, so be patient if it takes a while for them all to show up. Use zadig to install drivers for your USB sticksĬgminer.exe -o "" -u YOUR_BITCOIN_ADDRESS -p anything.Download the "zadig" USB Driver installer.Download the latest release of CGMiner (we used 3.8.2).We weren't surprised to find that a lot of the information about how to set up the mining software to talk to the USB sticks was out of date, so here's how things stand in November 2013 if you're mining with ASICMiner Block Eruptor Sapphire USB sticks on Windows. With 16 of the cute little guys, a powered USB hub, and a slow afternoon, we got to fiddlin'. We love Bitcoin, and while we haven't done much mining since GPUs got involved, last week Josh saw some little ASICMiner Block Eruptor USB sticks available for $30 each and figured they would be fun to mess around with. Guess who doesn't pay for electricty in their office?
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