I'm running FreeBSD 7.2 on a relatively new Dell Desktop, and when I switch between virtual consoles (ALT-f1, f2 etc) it works the first few times, but then just stops. It doesn't matter which terminal I switch to nor which one I switch back to. The terminal totally hangs up. The box remains up, stable and accessible in every way except the console.
I'm not running X, this is a straight text console. The keyboard (USB) is getting power (I can see the numlock lit up) but no keys respond (numlock, capslock, etc.). There is nothing odd in the messages file or dmesg.
Where else can I look?
Level of difficulty: long time Linux admin, relatively new to FreeBSD.