sgminer can't find GPUs (AMD)

[nu1mlock]

So I've been trying to get sgminer to work with my RX570 cards. Unfortunately it doesn't and apparently can't find any of my cards.

Note that my cards work fine with any other miner I throw at them. They are all found in device manager. They are all working. None of them has that yellow triangle. Simply put - the GPU's work.

When I try to start the miner I get the following error:

Code:

[23:52:28] clDevicesNum returned error, no GPUs usable
[23:52:28] 0 GPU devices max detected

If starting using --ndevs I get the following:

Code:

[23:52:28] CL Platform vendor: Intel(R) Corporation
[23:52:28] CL Platform name: Intel(R) OpenCL
[23:52:28] CL Platform version: OpenCL 2.0
[23:52:28] Error -1: Getting Device IDs (num)
[23:52:28] clDevicesNum returned error, no GPUs usable
[23:52:28] 0 GPU devices max detected

I've tried both the (as of writing) latest blockchain drivers from AMD but also the latest "regular" drivers (17.9.3).

Any ideas? Thanks!

Edit 1: I've tried --gpu-platform 1 and it made no difference. Probably because sgminer can't find my GPU's for some reason.
Edit 2: I've also tried sgminer 5.3.4 and 5.5.5 with the same results and error messages.

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[ThePom]

I had the same problem, I was running with the AMD Blockchain drivers, I changed back to a previous version (sorry I don't remember which but it was definitely not the latest normal ones) and used --gpu-platform 1 and it worked.

However, the hash rate was a lot lower than what I was getting with Claymore's miner and was crashing the driver, so I switched back to Claymore's...

What does -n give you? Can you see the cards with that?

It was a pain to get up and going, and then no good

Cheers,
Matt

Edit: This was all with version 5.5.5