john-users - Re: JtR OpenCL - AMD GPU not listed

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Date: Wed, 22 May 2013 13:11:30 -0700 (PDT)
From: NeonFlash <psykosonik_frequenz@...oo.com>
To: "john-users@...ts.openwall.com" <john-users@...ts.openwall.com>
Subject: Re: JtR OpenCL - AMD GPU not listed

I have tried connecting to the Linux machine over SSH using the ssh command from linux as well.

ssh -X username@<IP address of remote machine>

ssh username@<IP address of remote machine>

In both the cases, clinfo does not detect GPU and fglrxinfo is unable to open the display.

Please note that I am connecting to the remote machine over SSH as a root user (PermitRootLogin is set to Yes in his sshd_config file). I know this is not secure, but he has provided me root access.

While he is logged into X as a different user. So, would it be a problem?

Should I login as the same user via SSH as the user who is logged into X locally?

I hope this will help in fixing the issue.

Thanks.

________________________________
 From: NeonFlash <psykosonik_frequenz@...oo.com>
To: "john-users@...ts.openwall.com" <john-users@...ts.openwall.com> 
Sent: Thursday, May 23, 2013 1:00 AM
Subject: Re: [john-users] JtR OpenCL - AMD GPU not listed

Hi,

Even after setting that environment variable, issue persists. I am still unable to see the GPU in the clinfo output.

I think the issue is related to connection over SSH. Because my friend is able to run oclHashcat-plus on the machine when he logs into the X. However, over SSH, the GPU is not connected.

I want to use JtR with OpenCL.

I checked the sshd_config file on the machine:

 cat /etc/ssh/sshd_config | grep "X11"
X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
#       X11Forwarding no

X11Forwarding is set.

here is, fglrxinfo output (It does not detect the GPU either):

fglrxinfo
Error: unable to open display (null)

clinfo does not detect the GPU as well.

I am connecting to the machine over SSH using Putty over port 22. I  have checked the option, Enable X11 forwarding under SSH.

I found one more thread here related to a similar (but not the same issue):

http://devgurus.amd.com/thread/159348

________________________________
 From: Solar Designer <solar@...nwall.com>
To: john-users@...ts.openwall.com 
Sent: Thursday, May 23, 2013 12:11 AM
Subject: Re: [john-users] JtR OpenCL - AMD GPU not listed

On Wed, May 22, 2013 at 11:33:08AM -0700, NeonFlash wrote:
> 3. I am connected to the machine via SSH (it is my friend's machine):

Please try:

export DISPLAY=:0
clinfo

does it show the GPU now?

Alexander

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