I can confirm that I have the same issue and I can reproduce it on a Dell Latitude Laptop running Xubuntu 13.04. Mine occurs every time that I execute "airmon-ng start (interface)" on any wireless interface. So there definitely seems to be a correlation with the wireless drivers or interfaces. I get a kernel crash, but can partially recover by CTRL+ALT+F1 then switch back to X with ALT+F7.
I have also tried with an external USB wireless card and had the same result.
I can confirm that I have the same issue and I can reproduce it on a Dell Latitude Laptop running Xubuntu 13.04. Mine occurs every time that I execute "airmon-ng start (interface)" on any wireless interface. So there definitely seems to be a correlation with the wireless drivers or interfaces. I get a kernel crash, but can partially recover by CTRL+ALT+F1 then switch back to X with ALT+F7.
I have also tried with an external USB wireless card and had the same result.