linux - Ubuntu15.04：starting version 219

Question

Ubuntu15.04升完级(电脑一个星期没有关机了，重启前更新了内核，安装过MDM，还有其他的一些)之后重启就黑屏了，grub引导之后，出现黑屏显示：starting version 219，然后进不去图形界面，不过可以进入tty，谷歌百度都很少找得到，求助啊~~(>_<)~~现在只能进win7了就~~~

Answer 1

A black screen appears: starting version 219

This is a bug in systemd, which has been fixed in the 219-10ubuntu1 version of systemd. This has nothing to do with whether you can get into X or not. This is caused by the nvidia graphics card driver. Since systemd version:219-10ubuntu1 currently only has the wily package, it can be solved in vivid like this:
1. Replace the graphics card driver back to X.org’s Nouveau driver
2. Or, start the system with the 'nomodeset' parameter

Answer 2

I didn’t know what mdm is until I googled it. https://wiki.archlinux.org/index.php/Display_manager
Because I have never used this DM, I dare not say more, but it seems that there is no problem with the system startup, but the MDM failed to start.
You can try to restore the previous DM.
You can try it under ubuntu.
sudo apt-get install --reinstall gdm