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Old 05-23-2017, 03:05 AM   #16
redfox2807
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Please, be more precise on what's happening. Did Windows remove your Linux partitions? Or was it the partition table that was edited? What do you mean by mountpoints?

The main trick with UEFI is that it needs a separate fat32 EFI system partition. It's not the same as Windows hidden boot partition (I don't actually know if it's still required for UEFI systems). The EFI system partition must have 'boot' flag set. When setting the boot flag via parted, it automatically sets another required EFI system flag. So this EFI system partition will be a separate /boot partition in your Linux system. The bootloader (grub in your case) must be installed into that partition into the right place. Which one is right is specific to UEFI implementation (read motherboard manufacturer and maybe model). The main problem with UEFI is substandard implementations.

In case your motherboard uses the standard \EFI\BOOT\BOOTX64.EFI location, it can be overwritten by Windows. Is that what's happening to your system? You should add a different boot path. Unusually it's done using efibootmgr, but for some motherboard it doesn't work as expected. Then bcfg command should be used.

I suggest you reading a good documentation on what is UEFI and how it works. It could help you understand the root of the problem you face. Arch docs are good as well as this blog post
 
Old 05-23-2017, 06:37 AM   #17
thorkelljarl
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A little more information...

What is the make and model of the machine that's giving you trouble?
 
Old 05-23-2017, 07:50 AM   #18
Hail Happiness
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Quote:
Originally Posted by thorkelljarl View Post
A little more information...

What is the make and model of the machine that's giving you trouble?
No make and model, it's a self-build.

Here's the component list: https://pcpartpicker.com/list/MXNGYr
 
Old 05-23-2017, 07:58 AM   #19
Hail Happiness
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Quote:
Originally Posted by redfox2807 View Post
Please, be more precise on what's happening. Did Windows remove your Linux partitions? Or was it the partition table that was edited? What do you mean by mountpoints? [...]
I reinstalled LM with an ext4 /boot partition, and it's working... for now. I hope that that is the extent of the fix needed.

To summarize, what I did was:

- Install Win 10
- Turn off fastboot in Windows settings and in the UEFI settings
- Installed Linux Mint 18.1 alongside Windows 10 with 4 partitions: swap, root, home, boot
- Entered UEFI settings and changed the boot order so "ubuntu" was first (don't know why it showed it as Ubuntu rather than Linux Mint, since it did in past attempts)
- Installed GRUB Customizer and changed the boot order so that Win 10 is default boot.

I think it'll work. I hope it'll work. Thanks to everyone who helped or tried to help.
 
Old 05-23-2017, 03:00 PM   #20
Hail Happiness
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I'm back. I had the same problem as last time. Success, but then booting straight to Win 10 with no ubuntu boot option. TBH, only rEFInd helped. I downloaded and installed it, and it works once again, for now.
 
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Old 05-23-2017, 03:45 PM   #21
redfox2807
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Just check that Windows and Linux options in the refind menu point to different .efi files. Then it should be ok. Otherwise it could be overwritten again.
 
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