Originally Posted by AaronP
Is this bug report from after a freeze, before you shut down the system? If not, please get one of those, which you should be able to do over SSH.
When the display is frozen, can you attach to the X server with GDB and get a backtrace? "gdb /usr/bin/Xorg `pidof X`" should attach and then just run the "backtrace" command and paste the output here. Also, there are some messages in your system log from the vboxdrv driver doing some slightly shady things with interrupts. Does the hang still occur if you disable VirtualBox?
I'll try doing that once I have the time (removing 6200, getting another PC next to it, etc.)
To answer your questions right away:
It is a report before the freeze as of now.
The freezes occurred long before I added VirtualBox. Now, after plugging back 6200, everything is hunky dory; including VirtualBox; just plugging 6200 in and out makes all the difference. So much for now.