The crash is almost unreproducible. When I launch Opera screen flashes several times and I get black screen or X login screen. When I got black screen I reboot box by power-button
The logs are made not immediately after crash. Opera didn't start after last login so I just renamed settings (~/.opera), reinstalled it and restored settings. From that moment it worked fine.
If the bug will reappear you will get immediate logs but I am not focused on resolving that problem now. At worst I will fall back to default FB/SVGA driver but I need networking working!