GRUB2 install for x86-64 w/ BIOS

[Cloaked]

How do you install GRUB2 for x86-64 without EFI? I have a 64-bit windows 10 install that I’ve installed alongside Arch Linux and I originally installed GRUB for i386-pc so it couldn’t detect Win10. Do I need to reinstall windows for 32-bit, or will x86-64-xen work? (Whatever that is)

any and all help appreciated

[veerteex]

9 minutes ago, Cloaked said:

How do you install GRUB2 for x86-64 without EFI? I have a 64-bit windows 10 install that I’ve installed alongside Arch Linux and I originally installed GRUB for i386-pc so it couldn’t detect Win10. Do I need to reinstall windows for 32-bit, or will x86-64-xen work? (Whatever that is)

any and all help appreciated

did you try to reload grub config?

[Cloaked]

21 minutes ago, veerteex said:

did you try to reload grub config?

I’ve run multiple os-prober and grub-mkconfig commands with no luck. os-prober detects Windows, and during a mkconfig it shows up, but is never in the GRUB boot menu

[Master Disaster]

1 hour ago, Cloaked said:

How do you install GRUB2 for x86-64 without EFI? I have a 64-bit windows 10 install that I’ve installed alongside Arch Linux and I originally installed GRUB for i386-pc so it couldn’t detect Win10. Do I need to reinstall windows for 32-bit, or will x86-64-xen work? (Whatever that is)

any and all help appreciated

It gets pretty complicated with GRUB and Windows.

 

Both Linux & Windows need to be installed in the same mode, be it legacy boot mode or UEFI boot mode, for GRUB to be able to chainload a Windows boot loader. You cannot mix the two, so Linux in UEFI mode & Windows in legacy mode or vice versa will not work.

 

You can always uninstall your existing GRUB and swap it for the opposite version if you installed the wrong one. The Arch Install Wiki covers installing both the standard version and the EFI version.

 

I also had to edit the GRUB config file and add Windows to it manually on my Arch install though I think this is a side affect of Arch & Windows being on different volumes. If you've got both OSes on the same volume in separate partitions this shouldn't be an issue.

[Sauron]

1 hour ago, Cloaked said:

How do you install GRUB2 for x86-64 without EFI? I have a 64-bit windows 10 install that I’ve installed alongside Arch Linux and I originally installed GRUB for i386-pc so it couldn’t detect Win10. Do I need to reinstall windows for 32-bit, or will x86-64-xen work? (Whatever that is)

any and all help appreciated

if your windows installation uses EFI but your Arch installation does not then there's nothing you can do to make grub see the windows installation. You'll have to reinstall grub in EFI mode, which requires chrooting into your installation from the recovery drive booted in EFI mode and following the EFI-related grub guide on the wiki. Because you have a windows installation this shouldn't require you to repartition the drive as you can just use Windows' EFI partition, but bear in mind Windows likes to overwrite it when it updates and you may have to reinstall grub every so often.

[Cloaked]

15 minutes ago, Sauron said:

if your windows installation uses EFI but your Arch installation does not then there's nothing you can do to make grub see the windows installation. You'll have to reinstall grub in EFI mode, which requires chrooting into your installation from the recovery drive booted in EFI mode and following the EFI-related grub guide on the wiki. Because you have a windows installation this shouldn't require you to repartition the drive as you can just use Windows' EFI partition, but bear in mind Windows likes to overwrite it when it updates and you may have to reinstall grub every so often.

I said I wasn’t using UEFI for either OSes

[Sauron]

7 minutes ago, Cloaked said:

I said I wasn’t using UEFI for either OSes

...no, you didn't.

2 hours ago, Cloaked said:

How do you install GRUB2 for x86-64 without EFI? I have a 64-bit windows 10 install that I’ve installed alongside Arch Linux and I originally installed GRUB for i386-pc so it couldn’t detect Win10. Do I need to reinstall windows for 32-bit, or will x86-64-xen work? (Whatever that is)

any and all help appreciated

1 hour ago, Cloaked said:

I’ve run multiple os-prober and grub-mkconfig commands with no luck. os-prober detects Windows, and during a mkconfig it shows up, but is never in the GRUB boot menu

I really don't see you saying it anywhere.

 

Have you tried the "windows 8/10 not found" section in the wiki?

https://wiki.archlinux.org/index.php/GRUB#Windows_8/10_not_found

 

Alternatively you can try writing your own custom entry.

https://wiki.archlinux.org/index.php/GRUB#Boot_menu_entry_examples

[Cloaked]

2 hours ago, Sauron said:

 

Have you tried the "windows 8/10 not found" section in the wiki?

https://wiki.archlinux.org/index.php/GRUB#Windows_8/10_not_found

Okay, so how do I get into Windows to change that atm?

[Sauron]

6 minutes ago, Cloaked said:

Okay, so how do I get into Windows to change that atm?

did you install Linux on the same drive? if not you should be able to select the drive with windows from the boot menu of your motherboard. if you overwrote the windows bootloader with grub then you can try fixing your windows installation with a windows recovery drive.

[TorC]

Super GRUB Disk sometimes works

Easy BCD may be an option, if one wants to pay.