参考连接：https://itectec.com/ubuntu/ubuntu-gdm3-display-manager-hangs-after-booting-with-ubuntu-18-10/

直接搬运过来：
Not sure if this is going to fix your problem, but it’s quick, so it’s worth a try…

You may have a problem with an older computer, with an older GPU. Try this…

• boot to recovery mode
• choose root access

type:

sudo mount -o remount,rw /      # to remount the disk r/w

sudo pico /etc/gdm3/custom.conf # edit this file

change:

#WaylandEnable=false

to:

WaylandEnable=false

Then reboot.

我是重启一次后，卡在了logo界面，再重启一次就好了！