ubuntu启动失败the system is running in low graphics mode

时间:2021-01-04 12:11:48

ubuntu启动失败the system is running in lowg raphics mode

起因

ubuntu重新设置selinux的模式

修改配置文件/etc/selinux/config

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
#SELINUX=enforcing
SELINUX=permissive
# SELINUXTYPE= can take one of these two values:
# default - equivalent to the old strict and targeted policies
# mls - Multi-Level Security (for military and educational use)
# src - Custom policy built from source
SELINUXTYPE=ubuntu # SETLOCALDEFS= Check local definition changes
SETLOCALDEFS=0

其中的SELINUX=permissive即是表达当前selinux所处的模式

常用的selinux配置有三项:缺省是强制策略。

1、enforcing - 强制打开,拒绝违反安全策略

2、permissive - 遇到违反安全策略仍正常执行,但输出警告

3、disabled - 关闭安全策略

我将SELINUX设置为enforcing,导致重启后,系统启动失败,提示“the system is running in lowgraphics mode”

解决办法

进入recovery模式

  1. 系统重启选择ubuntu高级,选择recovery mode
  2. 在recovery Menu中选择 root Drop to root shell prompt
  3. 进入命令行模式,此时根文件系统挂在的为只读,使用如下命令重新挂在

    mount -rw -o remount /
  4. 修改配置文件/etc/selinux/config

参考文件

  1. ubuntu的recovery mode
  2. linux如何开启selinux