[问题]电脑突然回到命令界面且再也回不到图形界面

[xxhacker]

今天碰到了二次这种情况，本来图形界面用的好好的，突然之间就回到了命令界面
提示：
starting preload:preload
*running local boot scripts(/etc/rc.local) ok
*checking battery state... ok
之后光标一直闪，没有什么进展，换到tty7是全是黑屏，只有光标在闪啊闪，只能换到tty2 用命令重启
查看一下日志sys.log
提示：
init:tty1 main process kill by term signal
init:tty2 main process kill by term signal
init:tty3 main process kill by term signal
init:tty4 main process kill by term signal
init:tty5 main process kill by term signal
init:tty6 main process kill by term signal
scim-bridge:cleaning,done,exiting...
兄弟们帮帮忙！