Claymore not detect OpenCl - Ubuntu 18 amdgpu drivers

[tribycol]

Hi everyone,
I wonder if you can help me to solve this error. claymore does not detect my GPUs, it seems that it does not can access to the OpenCl driver after a recently update of Ubuntu 18.

I use secured boot and also no secured boot, same negative results.
please let me know your suggestions
thanks

[Ondart1]

I'm down also, same OS version and drivers and happening on two identical miners. I have AMD RX580 8GB cards and get this error on all GPUs:

GPU0 - not enough GPU memory to place DAG, you cannot mine this coin with this GPU
GPU0 - OpenCL error -61 - cannot allocate big buffer for DAG. Check readme.txt for possible solutions.