How hashcat work?

[usarname__]

before install driver:

Cannot find an OpenCL ICD loader library.

You are probably missing the native OpenCL runtime or driver for your platform.

* AMD GPUs on Linux require this runtime and/or driver:
  "RadeonOpenCompute (ROCm)" Software Platform (1.6.180 or later)
* Intel CPUs require this runtime and/or driver:
  "OpenCL Runtime for Intel Core and Intel Xeon Processors" (16.1.1 or later)
* Intel GPUs on Linux require this runtime and/or driver:
  "OpenCL 2.0 GPU Driver Package for Linux" (2.0 or later)
* NVIDIA GPUs require this runtime and/or driver:
  "NVIDIA Driver" (367.x or later)

after install amd driver with ./amdgpu-install --opencl=legacy,rocm:

OpenCL Info:

Platform ID #1
  Vendor  : Advanced Micro Devices, Inc.
  Name    : AMD Accelerated Parallel Processing
  Version : OpenCL 2.1 AMD-APP (3004.6)

  Device ID #1
    Type          : GPU
    Vendor ID      : 1
    Vendor        : Advanced Micro Devices, Inc.
    Name          : Baffin
    Version        : OpenCL 1.2 AMD-APP (3004.6)
    Processor(s)  : 14
    Clock          : 1187
    Memory        : 1280/1715 MB allocatable
    OpenCL Version : OpenCL C 1.2
    Driver Version : 3004.6

but when i run hashcat --benchmark, return it this error:

Hashmode: 2500 - WPA-EAPOL-PBKDF2 (Iterations: 4096)

* Device #1: ATTENTION! OpenCL kernel self-test failed.

Your device driver installation is probably broken.
See also: https://hashcat.net/faq/wrongdriver
 

but just with -m 2500, 15900, 12500, 6211, 13400, 6800, 11300 with other attack type everything is alright
what does it mean? what i have to do for fix it?