M5641 ubuntu無法進入的解法

我的桌電是ACER的M5641，之前要灌ubuntu時，一定要選擇acpi=off的選項，否則進到ubuntu 後就會立刻當機。只要搜尋“ubuntu M5641”，就會有不少類似的結果，不過大部分的都找不到解法。
最近桌電送修，換了主機板跟記憶體，ubuntu 突然不能用了，連acpi=off,noacpi都不能進去，卻很意外的發現解法。
在開機時按delete，進到american megatrend的設定畫面，找到advanced-> installer OS select，預設是windows，把它換成Others，這樣就可以連acpi=off不用關都可以順利開機了。

How to solve system fail when install ubuntu on acer M5641
The question is in the BIOS.
Pressing Delete while booting and enter the American Megatrend BIOS setting
Find Advanced-> Installer OS Select.
Change the default value “windows” to “Others”
Then the ubuntu can be run normally.
This article is welcome to share and hope this method work on your computer.