command -d detects 0 CUDA devices but can still mine
**miner version 1.5.2**

Hello. I am developing a plugin for [NiceHashMiner](https://github.com/nicehash/NiceHashMiner) to support your [nanominer](https://github.com/nicehash/NiceHashMiner/tree/master/src/Miners/NanoMiner).

### 1. NVIDIA only machine
Now when running `nanominer.exe -d` it results in `Detected 0 devices.` But I can still run the miners on this same machine here is the snippet of the log:
```
2019-07-23 11:18:18: <info>                                    _                 
2019-07-23 11:18:18: <info>  _ __   __ _ _ __   ___  _ __ ___ (_)_ __   ___ _ __ 
2019-07-23 11:18:18: <info> | '_ \ / _` | '_ \ / _ \| '_ ` _ \| | '_ \ / _ \ '__|
2019-07-23 11:18:18: <info> | | | | (_| | | | | (_) | | | | | | | | | |  __/ |   
2019-07-23 11:18:18: <info> |_| |_|\__,_|_| |_|\___/|_| |_| |_|_|_| |_|\___|_|   
2019-07-23 11:18:18: <info> 
2019-07-23 11:18:18: <info> Version 1.5.2
2019-07-23 11:18:18: <info> Started EthMan server on port 3333 without a password (read-only mode).
2019-07-23 11:18:18: <info> Started web interface on port 4000 without a password.
2019-07-23 11:18:18: <info> CUDA driver version is 10.1, runtime version is 10.0
2019-07-23 11:18:18: <info> Detected 2 devices
2019-07-23 11:18:18: <info> GPU 0 PCI 01:00.0, Platform: CUDA, Name: GeForce GTX 1070 Ti, 8192 MB available
2019-07-23 11:18:18: <info> GPU 1 PCI 02:00.0, Platform: CUDA, Name: GeForce GTX 1070 Ti, 8192 MB available
2019-07-23 11:18:18: <info> ----------------CryptoNightR:---------------
2019-07-23 11:18:18: <info> Currency: Monero
2019-07-23 11:18:18: <info> Wallet: 33hGFJZQAfbdzyHGqhJPvZwncDjUBdZqjW
2019-07-23 11:18:18: <info> Rig name: Doc_8ff07078
2019-07-23 11:18:18: <info> Email was not set.
2019-07-23 11:18:18: <info> Hashrate threshold to restart miner is not set
2019-07-23 11:18:18: <info> Added pool: cryptonightr.eu-new.nicehash.com:3375
2019-07-23 11:18:18: <info> Auto pool sorting is disabled
2019-07-23 11:18:18: <info> Devices: 0
2019-07-23 11:18:18: <info> -------------Common parameters:-------------
2019-07-23 11:18:18: <info> Log path: ./logs/
2019-07-23 11:18:18: <info> Log is written to file
2019-07-23 11:18:18: <info> GPU watchdog is disabled
2019-07-23 11:18:18: <info> Never calling reboot.bat (always restarting the miner in case of errors). 
2019-07-23 11:18:18: <info> Setting up algorithm: CryptoNightR
2019-07-23 11:18:20: <info> Connecting to pools...
2019-07-23 11:18:20: <info> Connected to pool: cryptonightr.eu-new.nicehash.com:3375
2019-07-23 11:18:20: <info> New job from cryptonightr.eu-new.nicehash.com:3375 | share difficulty = 200008
2019-07-23 11:18:20: [Statistics] Monero - Total speed: 0.000 H/s, Total shares: 0 Rejected: 0, Time: 00:01
2019-07-23 11:18:20: [Statistics] GPU0 t=41°C fan 50% power 39.52W. Total power: 39.52W
```

So when mining the GPUs are detected. 

This is a NVIDIA only machine.

### 2. mixed AMD+NVIDIA machine
When running `nanominer.exe -d` on a mixed rig this is the result:
```
Detected 4 devices:
GPU 0  PCI 09:00.0  8176 MB  Radeon RX Vega (gfx900)
GPU 1  PCI 0a:00.0  4096 MB  Radeon RX 560 Series (Baffin)
GPU 2  PCI 0b:00.0  8192 MB  Radeon RX 580 Series (Ellesmere)
GPU 3  PCI 0d:00.0  4096 MB  Radeon RX 560 Series (Baffin)
```

It doesn't see any CUDA devices. But again when mining the GPUs are detected:
```2019-07-23 11:26:54: <info>  _ __   __ _ _ __   ___  _ __ ___ (_)_ __   ___ _ __ 
2019-07-23 11:26:54: <info> | '_ \ / _` | '_ \ / _ \| '_ ` _ \| | '_ \ / _ \ '__|
2019-07-23 11:26:54: <info> | | | | (_| | | | | (_) | | | | | | | | | |  __/ |   
2019-07-23 11:26:54: <info> |_| |_|\__,_|_| |_|\___/|_| |_| |_|_|_| |_|\___|_|   
2019-07-23 11:26:54: <info> 
2019-07-23 11:26:54: <info> Version 1.5.2
2019-07-23 11:26:54: <info> Started EthMan server on port 3333 without a password (read-only mode).
2019-07-23 11:26:54: <info> Started web interface on port 4000 without a password.
2019-07-23 11:26:54: <info> CUDA driver version is 10.1, runtime version is 10.0
2019-07-23 11:26:55: <info> Detected 6 devices
2019-07-23 11:26:55: <info> GPU 0 PCI 06:00.0, Platform: CUDA, Name: GeForce GTX 1060 3GB, 3072 MB available
2019-07-23 11:26:55: <info> GPU 1 PCI 09:00.0, Platform: OpenCL, Name: Radeon RX Vega (gfx900), 8176 MB available
2019-07-23 11:26:55: <info> GPU 2 PCI 0a:00.0, Platform: OpenCL, Name: Radeon RX 560 Series (Baffin), 4096 MB available
2019-07-23 11:26:55: <info> GPU 3 PCI 0b:00.0, Platform: OpenCL, Name: Radeon RX 580 Series (Ellesmere), 8192 MB available
2019-07-23 11:26:55: <info> GPU 4 PCI 0c:00.0, Platform: CUDA, Name: GeForce GTX 1060 3GB, 3072 MB available
2019-07-23 11:26:55: <info> GPU 5 PCI 0d:00.0, Platform: OpenCL, Name: Radeon RX 560 Series (Baffin), 4096 MB available
2019-07-23 11:26:55: <info> ----------------CryptoNightR:---------------
```

### 3. Feature request to dump data in JSON or easy to parse format.

Since nanominer uses it's own device indexing it would be beneficial for nhm to call `nanominer.exe -dnhm` and it would dump all detected devices in a JSON array where one could see the miner index and PCI of the device. This is how nhm reliably maps it's [device detection](https://github.com/nicehash/DeviceDetection) with any miner