GTX 1070 + GTX 980 = ???

[bikes]

GTX 1070 was running hashcat fine in an old desktop. Added a GTX 980, and hashcat couldn't see either device.

Code:

$ hashcat --benchmark                                                                                                                                                                            [26/26]
hashcat (v6.2.6) starting in benchmark mode

Benchmarking uses hand-optimized kernel code by default.
You can use it in your cracking session by setting the -O option.
Note: Using optimized kernel code limits the maximum supported password length.
To disable the optimized kernel code in benchmark mode, use the -w option.

clGetPlatformIDs(): CL_PLATFORM_NOT_FOUND_KHR

ATTENTION! No OpenCL, HIP or CUDA compatible platform found.

You are probably missing the OpenCL, CUDA or HIP runtime installation.

* AMD GPUs on Linux require this driver:
  "AMDGPU" (21.50 or later) and "ROCm" (5.0 or later)
* Intel CPUs require this runtime:
  "OpenCL Runtime for Intel Core and Intel Xeon Processors" (16.1.1 or later)
* NVIDIA GPUs require this runtime and/or driver (both):
  "NVIDIA Driver" (440.64 or later)
  "CUDA Toolkit" (9.0 or later)

Current state: Host was downgraded to Debian 11 with a fresh install. Successfully installed CUDA toolkit + NVIDIA driver.

Code:

$ sudo nvidia-smi
Thu Aug 24 17:06:59 2023
+---------------------------------------------------------------------------------------+
| NVIDIA-SMI 535.86.10              Driver Version: 535.86.10    CUDA Version: 12.2    |
|-----------------------------------------+----------------------+----------------------+
| GPU  Name                Persistence-M | Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf          Pwr:Usage/Cap |        Memory-Usage | GPU-Util  Compute M. |
|                                        |                      |              MIG M. |
|=========================================+======================+======================|
|  0  NVIDIA GeForce GTX 1070        Off | 00000000:01:00.0 Off |                  N/A |
|  0%  48C    P0              35W / 151W |      0MiB /  8192MiB |      0%      Default |
|                                        |                      |                  N/A |
+-----------------------------------------+----------------------+----------------------+

+---------------------------------------------------------------------------------------+
| Processes:                                                                            |
|  GPU  GI  CI        PID  Type  Process name                            GPU Memory |
|        ID  ID                                                            Usage      |
|=======================================================================================|
|  No running processes found                                                          |
+---------------------------------------------------------------------------------------+

This sees the 1070 but not the 980; however both devices register with the OS.

Code:

$ lspci | grep -F NVIDIA
01:00.0 VGA compatible controller: NVIDIA Corporation GP104 [GeForce GTX 1070] (rev a1)
01:00.1 Audio device: NVIDIA Corporation GP104 High Definition Audio Controller (rev a1)
03:00.0 VGA compatible controller: NVIDIA Corporation GM204 [GeForce GTX 980] (rev a1)
03:00.1 Audio device: NVIDIA Corporation GM204 High Definition Audio Controller (rev a1)

Perhaps this is more of an NVIDIA issue than a hashcat issue; though I'm curious about:

1. Why hashcat stopped seeing the GTX 1070?
2. Why CUDA + NVIDIA don't see the GTX 980?