问题
请看最后一行
Started GNOME display manager... and deal with any system changes..p link was shut down.....
答案1
Alt+F2 ,启动终端会话,能够登录。
sudo apt purge gdm gdm3
sudo apt install gdm3 ubuntu-desktop
systemctl restart gdm
答案2
这是版本3.16的bug,
sudo apt-get install lightdm
sudo dpkg-reconfigure lightdm
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