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[Translated] tech/20150824 Fix No Bootable Device Found Error After Installing Ubuntu.md

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ictlyh Translating
Fix No Bootable Device Found Error After Installing Ubuntu
================================================================================
Usually, I dual boot Ubuntu and Windows but this time I decided to go for a clean Ubuntu installation i.e. eliminating Windows completely. After the clean install of Ubuntu, I ended up with a screen saying **no bootable device found** instead of the Grub screen. Clearly, the installation messed up with the UEFI boot settings.
![No Bootable Device Found After Installing Ubuntu](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_1.jpg)
I am going to show you how I fixed **no bootable device found error after installing Ubuntu in Acer laptops**. It is important that I mention that I am using Acer Aspire R13 because we have to change things in firmware settings and those settings might look different from manufacturer to manufacturer and from device to device.
So before you go on trying the steps mentioned here, let’s first see what state my computer was in during this error:
- My Acer Aspire R13 came preinstalled with Windows 8.1 and with UEFI boot manager
- Secure boot was not turned off (my laptop has just come from repair and the service guy had put the secure boot on again, I did not know until I ran up in the problem). You can read this post to know [how disable secure boot in Acer laptops][1]
- I chose to install Ubuntu by erasing everything i.e. existing Windows 8.1, various partitions etc.
- After installing Ubuntu, I saw no bootable device found error while booting from the hard disk. Booting from live USB worked just fine
In my opinion, not disabling the secure boot was the reason of this error. However, I have no data to backup my claim. It is just a hunch. Interestingly, dual booting Windows and Linux often ends up in common Grub issues like these two:
- [error: no such partition grub rescue][2]
- [Minimal BASH like line editing is supported][3]
If you are in similar situation, you can try the fix which worked for me.
### Fix no bootable device found error after installing Ubuntu ###
Pardon me for poor quality images. My OnePlus camera seems to be not very happy with my laptop screen.
#### Step 1 ####
Turn the power off and boot into boot settings. I had to press Fn+F2 (to press F2 key) on Acer Aspire R13 quickly. You have to be very quick with it if you are using SSD hard disk because SSDs are very fast in booting. Depending upon your manufacturer/model, you might need to use Del or F10 or F12 keys.
#### Step 2 ####
In the boot settings, make sure that Secure Boot is turned on. It should be under the Boot tab.
#### Step 3 ####
Go to Security tab and look for “Select an UEFI file as trusted for executing” and click enter.
![Fix no bootable device found ](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_2.jpg)
Just for your information, what we are going to do here is to add the UEFI settings file (it was generated while Ubuntu installation) among the trusted UEFI boots in your device. If you remember, UEFI boot’s main aim is to provide security and since Secure Boot was not disabled (perhaps) the device did not intend to boot from the newly installed OS. Adding it as trusted, kind of whitelisting, will let the device boot from the Ubuntu UEFI file.
#### Step 4 ####
You should see your hard disk like HDD0 etc here. If you have more than one hard disk, I hope you remember where did you install Ubuntu. Press Enter here as well.
![Fix no bootable device found in boot settings](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_3.jpg)
#### Step 5 ####
You should see <EFI> here. Press enter.
![Fix settings in UEFI](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_4.jpg)
#### Step 6 ####
You’ll see <Ubuntu> in next screen. Don’t get impatient, you are almost there
![Fixing boot error after installing Ubuntu](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_5.jpg)
#### Step 7 ####
You’ll see shimx64.efi, grubx64.efi and MokManager.efi file here. The important one is shimx64.efi here. Select it and click enter.
![Fix no bootable device found](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_6.jpg)
In next screen, type Yes and click enter.
![No_Bootable_Device_Found_7](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_7.jpg)
#### Step 8 ####
Once we have added it as trused EFI file to be executed, press F10 to save and exit.
![Save and exist firmware settings](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_8.jpg)
Reboot your system and this time you should be seeing the familiar Grub screen. Even if you do not see Grub screen, you should at least not be seeing “no bootable device found” screen anymore. You should be able to boot into Ubuntu.
If your Grub screen was messed up after the fix but you got to login into it, you can reinstall Grub to boot into the familiar purple Grub screen of Ubuntu.
I hope this tutorial helped you to fix no bootable device found error. Any questions or suggestions or a word of thanks is always welcomed.
--------------------------------------------------------------------------------
via: http://itsfoss.com/no-bootable-device-found-ubuntu/
作者：[Abhishek][a]
译者：[译者ID](https://github.com/译者ID)
校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](https://linux.cn/) 荣誉推出
[a]:http://itsfoss.com/author/abhishek/
[1]:http://itsfoss.com/disable-secure-boot-in-acer/
[2]:http://itsfoss.com/solve-error-partition-grub-rescue-ubuntu-linux/
[3]:http://itsfoss.com/fix-minimal-bash-line-editing-supported-grub-error-linux/

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修复安装完 Ubuntu 后无可引导设备错误
================================================================================
通常情况下，我启动 Ubuntu 和 Windows 双系统，但是这次我决定完全消除 Windows 纯净安装 Ubuntu。纯净安装 Ubuntu 完成后，结束时屏幕输出 **no bootable device found** 而不是进入 GRUB 界面。显然，安装搞砸了 UEFI 引导设置。
![安装完 Ubuntu 后无可引导设备](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_1.jpg)
我会告诉你我是如何修复**在宏碁笔记本上安装 Ubuntu 后出现无可引导设备错误**。我声明了我使用的是宏碁灵越 R13，这很重要，因为我们需要更改固件设置，而这些设置可能因制造商和设备有所不同。
因此在你开始这里介绍的步骤之前，先看一下发生这个错误时我计算机的状态：
- 我的宏碁灵越 R13 预装了 Windows8.1 和 UEFI 引导管理器
- 关闭了 Secure boot（我的笔记本刚维修过，维修人员又启用了它，直到出现了问题我才发现）。你可以阅读这篇博文了解[如何在宏碁笔记本中关闭 secure boot][1]
- 我通过选择清除所有东西安装 Ubuntu，例如现有的 Windows 8.1，各种分区等。
- 安装完 Ubuntu 之后，从硬盘启动时我看到无可引导设备错误。但能从 USB 设备正常启动
在我看来，没有禁用 secure boot 可能是这个错误的原因。但是，我没有数据支撑我的观点。这仅仅是预感。有趣的是，双系统启动 Windows 和 Linux 经常会出现这两个 Grub 问题：
- [error: no such partition grub rescue][2]
- [Minimal BASH like line editing is supported][3]
如果你遇到类似的情况，你可以试试我的修复方法。
### 修复安装完 Ubuntu 后无可引导设备错误 ###
请原谅我没有丰富的图片。我的一加相机不能很好地拍摄笔记本屏幕。
#### 第一步 ####
关闭电源并进入 boot 设置。我需要在宏碁灵越 R13 上快速地按 Fn+F2。如果你使用固态硬盘的话要按的非常快，因为固态硬盘启动速度很快。取决于你的制造商，你可能要用 Del 或 F10 或者 F12。
#### 第二步 ####
在 boot 设置中，确保启用了 Secure Boot。它在 Boot 标签里。
#### 第三步 ####
进入到 Security 标签，查找 “Select an UEFI file as trusted for executing” 并敲击回车。
![修复无可引导设备错误](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_2.jpg)
特意说明，我们这一步是要在你的设备中添加 UEFI 设置文件（安装 Ubuntu 的时候生成）到可信 UEFI 启动。如果你记得的话，UEFI 启动的主要目的是提供安全性，由于（可能）没有禁用 Secure Boot，设备不会试图从新安装的操作系统中启动。添加它到类似白名单的可信列表，会使设备从 Ubuntu UEFI 文件启动。
#### 第四步 ####
在这里你可以看到你的硬盘，例如 HDD0。如果你有多块硬盘，我希望你记住你安装 Ubuntu 的那块。同样敲击回车。
![在 Boot 设置中修复无可引导设备错误](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_3.jpg)
#### 第五步 ####
你应该可以看到 <EFI>，敲击回车。
![在 UEFI 中修复设置](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_4.jpg)
#### 第六步 ####
在下一个屏幕中你会看到 <Ubuntu>。耐心点，马上就好了。
![安装完 Ubuntu 后修复启动错误](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_5.jpg)
#### 第七步 ####
你可以看到 shimx64.efi，grubx64.efi 和 MokManager.efi 文件。重要的是 shimx64.efi。选中它并敲击回车。
![修复无可引导设备](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_6.jpg)
在下一个屏幕中，输入 Yes 并敲击回车。
![无可引导设备_7](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_7.jpg)
#### 第八步 ####
当我们添加它到可信 EFI 文件并执行时，按 F10 保存并退出。
![保存并退出固件设置](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/08/No_Bootable_Device_Found_8.jpg)
重启你的系统，这时你就可以看到熟悉的 GRUB 界面了。就算你没有看到 Grub 界面，起码也再也不会看到“无可引导设备”。你应该可以进入 Ubuntu 了。
如果修复后搞乱了你的 Grub 界面，但你确实能登录系统，你可以重装 Grub 并进入到 Ubuntu 熟悉的紫色 Grub 界面。
我希望这篇指南能帮助你修复无可引导设备错误。欢迎提出任何疑问、建议或者感谢。
--------------------------------------------------------------------------------
via: http://itsfoss.com/no-bootable-device-found-ubuntu/
作者：[Abhishek][a]
译者：[ictlyh](http://www.mutouxiaogui.cn/blog/)
校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](https://linux.cn/) 荣誉推出
[a]:http://itsfoss.com/author/abhishek/
[1]:http://itsfoss.com/disable-secure-boot-in-acer/
[2]:http://itsfoss.com/solve-error-partition-grub-rescue-ubuntu-linux/
[3]:http://itsfoss.com/fix-minimal-bash-line-editing-supported-grub-error-linux/