Doubt while triaging

[RuiManuel RibeiroNande]

Hi, I have a doubt about triaging a bug. I think it might be a package problem.I tried to replicate the bug, but so far nothing. Only an install error which was fixed by re-running the installation.
I did forget to take a note on the error, though.
The bug reported was about nvidia experimental drivers 310 package.The reporter says 304 works fine, which I confirmed when trying to replicate.His situation is getting a black screen when lightdm starts. It worked with me, although it did present an error, so I can't confirm it.
I suggested installing the nvidia 310.19 from the nvidia site (which I'm using with no problem) to see if it was package related, or some function included in the drivers post-304 that might be conflicting with his system configuration. In his reply, he mentioned that with 304 he gets no xorg.conf file, and with 310, lightdm doesn't work with or without the xorg.conf file. He's not particularly inclined to use non-packaged drivers, so he didn't try the 310.19. I mentioned the file to him because, with drivers from nvidia, if I update the xorg.conf file I get the black screen like him. The install script defaults to not update, though.
It's my first bug triage so I'm looking for pointers.
If you could take a look and give me your opinion, the bug number is 1093376
Thanks... 		 	   		  
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