Cracking in Google Cloud Instance Questions.

[grasshopper]

Looks like you did not install Nvidia drivers.
Have a read: https://www.tecmint.com/install-nvidia-d...on-ubuntu/

if you are answering me then gpu drivers ARE installed.

nvidia-smi shows driver version

the instance already comes with nvidia and cuda installs. i think the issue is with cuda. i tried remove it but no luck. and btw instance cannot be rebooted

[Mem5]

Kindly paste the output of:
hashcat -I
and
clinfo (after install apt-get install clinfo)

[grasshopper]

root@C.12560:~/hashcat-4.2.1$ ./hashcat64.bin -I
hashcat (v4.2.1) starting...

clGetPlatformIDs(): CL_PLATFORM_NOT_FOUND_KHR

root@C.12560:~/hashcat-4.2.1$ clinfo
Number of platforms 0

nvidia-smi
Wed Sep 26 21:26:14 2018
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 390.48 Driver Version: 390.48 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GeForce GTX 1080 Off | 00000000:01:00.0 On | N/A |
| 27% 35C P8 6W / 180W | 354MiB / 8117MiB | 1% Default |
+-------------------------------+----------------------+----------------------+

+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|

[undeath]

Code:

root@C.12560:~/hashcat-4.2.1$ clinfo
Number of platforms 0

well, there's your problem. opencl runtime isn't installed or working.

[Mem5]

try
apt-get install nvidia-390

[grasshopper]

Code:

root@C.12560:~/hashcat-4.2.1$ clinfo
Number of platforms 0

well, there's your problem. opencl runtime isn't installed or working.

yeah, i understand that. but don't understand how to make it work

after 

apt-get install nvidia-390

I get 

Errors were encountered while processing:
 nvidia-390
 libcuda1-390
 nvidia-opencl-icd-390
E: Sub-process /usr/bin/dpkg returned an error code (1)

anyway, i don't understand why you suggest to install nvidia driver if nvidia-smi shows it's already installed

[Mem5]

apt-get install nvidia-390

I get 

Errors were encountered while processing:
 nvidia-390
 libcuda1-390
 nvidia-opencl-icd-390
E: Sub-process /usr/bin/dpkg returned an error code (1)

anyway, i don't understand why you suggest to install nvidia driver if nvidia-smi shows it's already installed

Yes it's installed but there is another issue, maybe confilct.
That's a pure linux problem, not related to hashcat, I can"t help more sorry.

[c275]

EDIT:
change the image to nvidia/opencl and everything works fine