hashcat Forum

I'm having trouble with hashcat 6 working with any of the NVidia 2000 series GPUs I've tried.  I've tried on a laptop RTX 2060 (Linux Mint) and a hashing rigs with a mix of GTX 1080 Founders and GTX 2080 Supers (Ubuntu 18.04) with the exact same results on the 2080 GPUs only.  The 1080's work just fine...

I have easier access to the laptop so I will use that for the examples below --

First - without nvidia-cuda-toolkit installed:



And the nvidia packages that are installed when it works:



As you can see, it works, but complains about falling back to OpenCL.  In addition, hashcat 6 pegs the CPU at 100% when running in OpenCL fallback.  This is not ideal.  hashcat 5 can run for weeks (probably forever) without using more than 20% of the CPU, so we are currently reverted back to hashcat 5 because of this problem.

With Cuda Toolkit installed:



Here is the package list for all nvidia when the cuda toolkit is installed:



As you can see, the GTX 2080's just don't work with nvidia-cuda-toolkit and dependencies installed.  I've tried using the Ubuntu default repositories and installing the NVidia drivers with apt, and also downloading the drivers directly from NVidia and installing them that way.  No change.

I have used the precompiled hashcat binaries and built from source. I've also tried the same with the latest beta of hashcat.  No change.

Additionally, hashcat 6.0 with only the 1080 GPU AND cuda toolkit still pegs the CPU at 100%, so we still can't use hashcat 6 with just those GPU without CPU issues.

Any ideas why this doesn't work?

Your driver versions and component versions, as shown in your package lists, are not consistent with the versions provided with the current CUDA Toolkit installation.

Grab this file https://developer.nvidia.com/cuda-downlo...nfilelocal

It's the runfile for installing on Ubuntu 18.04. You should see versions consistent with the following list after installation: https://docs.nvidia.com/cuda/cuda-toolki...t-versions

Current Driver version for linux is >= 450.XX

Now, that said, I'm not certain a driver upgrade will purely solve the issue. It sounds more like you've got some other environmental issue at play here. Especially as I can not reproduce with my linux test bench, It's also mixed generation including 20 series cards, running ubuntu 18.04 with latest tookit, hashcat 5.1.0 and 6.0.0 both running perfectly.

Thank you!  The 450 driver fixed the hashcat 6.0 cuda errors.

I'm still seeing CPU usage at 100% with hashcat 6 but not 5 for the same tests though:

Hashcat 5.1: is using 6 - 10% CPU:



Hashcat 6.0 is using 96-100:



How does your CPU look with hashcat 6 vs 5?

6.0.0 is definitely using a bit more CPU for me, though not nearly as significant as you are seeing. How many cards are in that system? This may be an issue of scale, where more cards uses more CPU like we had with the Nvidia core spinning issue. The suggestion still, due mostly to that issue, is to have at minimum 1 fast core per GPU in the system, with 1-2 cores left over for the rest of the system.