When dpkg tries to configure xserver-xfree86, it tries to autodetect my mouse. I do not have a PS/2 or serial mouse, mine is installed via USB. The mouse is not autodetected, and WORSE, my keyboard locks up (it is a PS/2 keyboard) so that I cannot continue text entry and finish the package configuration. Unplugging the keyboard and replugging it does not work. If I log out if X (when I run dpkg through a konsole), I get the use of my keyboard back. Otherwise, I must reboot my computer.
Obviously not good, as I cannot configure the new xserver-xfree86 package, so I cannot finish my package configuration or upgrade any other packages. Grrr.