ubuntu15.04 starting ACPI event daemon

Question

从ubuntu14.04升级到ubuntu15.04，重启显示如下

在执行到starting ACPI event daemon时，在tty和图形界面间不停跳转，导致无法停留在tty界面输入

在grub设置acpi=off，进入后结果为

我改如何拯救我的ubuntu啊？

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最终重装了系统

Answer 1

Personally, I do not recommend cross-version upgrades, and 14.04 is an LTS version with a support period of up to 5 years. It is also inappropriate to upgrade to a non-LTS version like 15.04.

The author may consider reinstalling Ubuntu 14.04 or 15.04 without formatting. Method reference:
http://my.oschina.net/eechen/blog/222841
The general idea is to back up data in the Ubuntu installation environment to a folder in the root directory For example, /mybackup, then choose not to format the installation during installation:

Answer 2

Try Linux 4.1 and above. On my 4.0.1, this happens when switching from X to tty. suspend and resume will temporarily return to normal.