I occasionally hit this shortcut by accident (for example when using Ctrl-Backspace to remove a word and then switching to another shortcut that involves Alt). This gets me to the login screen and all the programs close.
I haven't found any solutions anywhere on the Internet, searching for hours. Other threads mostly talk about disabling / enabling this shortcut and not about changing it.
Also someone asked this question here, but the accepted answer doesn't answer the question: Change CTRL+ALT+BACKSPACE to restart X server
Currently this shortcut is disabled on my system, but I've read that it should be enabled in case the system hangs.
I want to change the shortcut to something preferably including three different keys, like Ctrl-Alt-Insert for example.