系统设置/输入设备
键盘
Enable Control + Alt + Backspace to kill X-Server
Under the
tab, make sure is checked. Then look in the list below for "Key sequence to kill the X server". Under it, you should be able to check . Once done, click on .Information
Under the Advanced tab, make sure Configure keyboard options is checked. Then look in the list below for "Key sequence to kill the X server". Under it, you should be able to check Control + Alt + Backspace. Once done, click on Apply.