PS. When you write about SysRq you have console in mind? Because without freeze I tested out those shortcuts, and they work in console, but NOT in GUI desktop. SysRq is commented out by default, so there is no such key at all: https://github.com/xkbcommon/libxkbcommon/blob/master/test/data/keycodes/evdev And when system freezes I cannot switch to console.