Comment 3 for bug 371288

Hi again, Szilárd. According to https://wiki.ubuntu.com/X/Reporting, X lockup reports require some additional information not yet included here. You've already provided a detailed description of the problem, version information, the clearest steps for reproduction that you have available and your /var/log/Xorg.0.log.old file. But it seems as though we're still missing a full backtrace, details of the completeness of the X failure, and your /var/log/Xorg.0.log and ~/.xsession-errors files. Please follow the above link and see the "X crash, lockup, freeze, exit, or doesn't start/shutdown" category under "What to Include in Bug Reports" for details.

If you can provide these items, your report may be eligible for Confirmed status. In the meantime, I'm marking it Incomplete. Please post back if you recover any additional information or have any questions, and thanks again for spending time with this issue.