In the magic sysrq key combinations, there is the combination
alt+sysrq+r which, according to wikipedia, does the following:
Switch the keyboard from raw mode, the mode used by programs such as
X11 and svgalib, to XLATE mode
What is raw mode? and what is XLATE mode?
Can I switch back to raw mode once I have switched to XLATE mode?
How can I tell which mode my keyboard is in?