Arch Linux

thehungryturnip

Member

From: New York, NY

Registered: 2019-05-02

Posts: 15

[SOLVED] Windows 10 showing up in os-prober but not GRUB

When running os-prober it shows the windows boot manager:

/dev/nvme0n1p2@/EFI/Microsoft/Boot/bootmgfw.efi:Windows Boot Manager:Windows:efi

but running grub-mkconfig doesn't create a Windows entry in the bootloader

I'm not sure what's the next step to troubleshoot/look into what may be causing this.

Thanks in advance for your help!

Last edited by thehungryturnip (2019-10-07 21:18:04)

Spinnekop

Member

Registered: 2018-02-16

Posts: 28

Re: [SOLVED] Windows 10 showing up in os-prober but not GRUB

This section of the wiki might help https://wiki.archlinux.org/index.php/GRUB

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thehungryturnip

Member

From: New York, NY

Registered: 2019-05-02

Posts: 15

Re: [SOLVED] Windows 10 showing up in os-prober but not GRUB

The GRUB wiki is what I was following to configure my bootloader. However:

1. I'm failing to see a scenario described in the wiki that talks about an OS visible to os-prober (which is true in my case) but *not* showing up in GRUB. Everything I'm seeing claims that if it's visible to os-prober it will automatically be included in GRUB.

2. The only thing that I'm not sure about is that the wiki says "install the os-prober package and mount the partitions that contain the other systems.", which is a bit confusing to me because

   1. If this is necessary for os-prober to find the OS, then this is not an issue because my os-prober does properly find the windows OS.

   2. Also, from my searches everywhere I don't see anyone mentioning mounting a specific windows partition for os-prober/GRUB to work.

   3. If mounting is actually needed, which of the Windows partition should be mounted and where?

Last edited by thehungryturnip (2019-10-07 20:43:10)

thehungryturnip

Member

From: New York, NY

Registered: 2019-05-02

Posts: 15

Re: [SOLVED] Windows 10 showing up in os-prober but not GRUB

I spent the past few hours configuring the rest of my system (desktop environment, software, etc.) and decided to run grub-mkconfig again just out of curiosity.

The good news is this time around grub-mkconfig suddenly recognized my Windows bootloader!

The bad news is I have no idea why I've ran grub-mkconfig numerous times before this without it working. (Through numerous restarts.) Unfortunately I'm not able to identify what changed this time around as it's been a few hours and I've been working on many other configurations/setups. (I don't think I've touched anything GRUB or os-prober since I posted.)

I'm going to mark this thread as solved for now, but unfortunately don't have a solution to offer others running into the same issue.