You will need to select a key combination similar to this: Alt+Ctrl+PrtSc+R+E+I+S+U+O
https://en.wikipedia.org/wiki/Magic_SysRq_key https://askubuntu.com/questions/911522/how-can-i-enable-the-magic-sysrq-key-on-ubuntu-desktop
You will need to select a key combination similar to this: Alt+Ctrl+PrtSc+R+E+I+S+U+O
https://en.wikipedia.org/wiki/Magic_SysRq_key https://askubuntu.com/questions/911522/how-can-i-enable-the-magic-sysrq-key-on-ubuntu-desktop