Comment 6 for bug 725580

No, unfortunately in order to troubleshoot this bug we need to have logs and register dumps from when the system is frozen.
(I guess it is possible the bug will get independently fixed elsewhere, but this bug report is not actionable itself without this info.)

If you haven't already, you could try connecting via ethernet or setting your wireless to share across all users. There are some other tips for debugging these kinds of issues here:

https://wiki.ubuntu.com/X/Troubleshooting/BlankScreen#Analysis%20Techniques
https://wiki.ubuntu.com/X/NonGraphicalBoot