mod4 переключает виртуальные консоли

$ cat /etc/conf.d/keymaps
...
# Should we first load the 'windowkeys' console keymap?  Most x86 users will
# say "yes" here.  Note that non-x86 users should leave it as "no".
# Loading this keymap will enalbe VT switching (like ALT+LEft/Right)
# using the special windows keys on the linux console
windowkeys="no"
...