Date: Wed, 3 Jun 2015 01:16:23 +0300 From: Solar Designer <solar@...nwall.com> To: john-users@...ts.openwall.com Subject: Re: Multiple GPU and Fork On 2015-06-02 22:45, Luis Rocha wrote: > I'm running Ubuntu 14.04.2 LTS and In this case I had X running. ... but you probably didn't have DISPLAY nor XAUTHORITY set to talk to your X server from that root shell. (Maybe your bad habit of running john as root has finally backfired.) You should be running john from a user account and environment authorized to talk to your X server. As a test, try running "xterm &" from the shell that you use to start john - will it start, will it appear on your desktop? If so, exit the xterm and then start john. If not, correct this first. On Tue, Jun 02, 2015 at 11:35:51PM +0200, magnum wrote: > If it works fine with oclHashcat it should work fine with JtR. Not sure > what is the problem. > > You could try running john with sudo just to see if it makes a > difference. Sometimes I've seen that work when there was problems with > X. But again, if oclHascat works I see no reason why JtR would not. No, the problem is in fact specific to just "john --fork". Without --fork, it works. Apparently, the newly implemented X-less compute in new Catalyst (a welcome change!) is somehow incompatible with fork(). I have no idea why not. We might want to debug this and try to come up with a workaround. Alexander
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