Windows not found after update

[robin0800]

OS prober has been disabled in the latest grub
You can re enable it in “/etc/default/grub” then “sudo update-grub”

# Uncomment this option to enable os-prober execution in the grub-mkconfig command
GRUB_DISABLE_OS_PROBER=false

[realmain]

@Thraix

I read through the update post about adding the GRUB_DISABLE_OS_PROBER=false to /etc/default/grub, but this did absolutely nothing for me.

Did you do sudo update-grub like it says in that same post?

[Aragorn]

Welcome to the forum!

If only people were to actually use the search function, just like it says before you create a new thread, eh?

After update, grub doesn't find windows install

Hi, I’ve been using both Manjaro and windos for a couple years through dual boot without issue. Today Manjaro asked me to run some updates, like it often does, but when I finished work and rebooted to launch windows and get some gaming done, grub wasn’t showing at all and Manjaro would launch without asking me for input at all. I looked around, modified /etc/default/grub to set GRUB_TIMEOUT_STYLE=menu (it was hidden for some reason), and now I see it… but the option to boot windows was gone. I…

GRUB problems after update, windows 10 not showing up

After I updated manjaro it required a restart. After restart the GRUB didn’t show up. I fixed it with sudo nano /etc/default/grub GRUB_TIMEOUT_STYLE=menu sudo update-grub Now GRUB shows up but not the options for windows 10. I’ve been dual booting manjaro and windows 10 for more than a year, so ply no questions about EFI or legacy. Even the os-probe shows windows! sudo os-prober /dev/sdb1:Windows 10:Windows:chain sudo update-grub I need windows for development because I need virtualbox that…

Grub broke with last update

I have a dualboot system with Manjaro and Windows in a Thinkpad. With the last update (today), the boot menu is gone. Now it boots into Manjaro directly, skipping the menu altogether. What settings did it change? How do I set them back as they were in the previous version? Cheers

[Thraix]

@realmain

Did you do sudo update-grub like it says in that same post?

Yes I did use that command. Still does not show up

[Thraix]

@Aragorn

Welcome to the forum!

If only people were to actually use the search function, just like it says before you create a new thread, eh?

Thanks for the hostility, all the post I’ve read got solved by adding the GRUB_DISABLE_OS_PROBE=false flag, and this did not work for me. Despite also updating grub. Would you rather me post on those instead, even when those are solved?

If this community is this toxic, I might as well jump ship tbh. Jesus

@Falav

Do you see the Windows partition in Gparted?

Yes it is still there, for some reason I cannot post images of gparted. But there are two of them, one Microsoft reserved partition and one basic data partition.

[garvitjoshi9]

Hey Thraix,
Could you look into this comment.

[Stable Update] 2021-03-08- Kernels, Plasma 5.21.2, Haskell, Kodi, Grub, KDE-Dev

For now i solved reinstalling the previous package of GRUB with sudo pacman -U /var/cache/pacman/pkg/grub-2.04-16-x86_64.pkg.tar.zst and after running sudo update-grub it works again.

As I am not that expert, let other people comment on this, if they say this is safe you can do this.
Thanks,

[loopier]

I did search and these didn’t come up. But thanks for posting them, they are helpful.

Cheers.

[realmain]

@Thraix

How would I go about debugging this further?

Hm… Are you able to select the Windows Bootloader and boot into it? Just to see if it broke somehow or not.

@Thraix

I read through the update post about adding the GRUB_DISABLE_OS_PROBER=false to /etc/default/grub, but this did absolutely nothing for me.

And just to confirm, this is 100% in the file and saved right?

Alternatively… stop using grub and use rEFInd instead

I like rEFInd because you never have to use something like update-grub. It just scans for all bootable systems at boot.

@Thraix

From what I know I do use efi to load my system but the /sys/firmware/efi folder does not exist and efibootmgr complains about efi variables not being supported. I’m fairly sure this was not the case before the update.

Though this might be the issue. You can try to reinstall grub.

GRUB/Restore the GRUB Bootloader

Another thing you can check is if ntfs-3g is still installed or not, you need that for os-prober to detect it.

[Thraix]

@realmain

Hm… Are you able to select the Windows Bootloader and boot into it? Just to see if it broke somehow or not.

Not sure how I would do that if grub is not recognizing it.

@realmain

And just to confirm, this did 100% is in the file and saved right?

Yes I’ve copy-pasted the command multiple times just to make sure.

@realmain

Alternatively… stop using grub and use rEFInd instead

I like rEFInd because you never have to use something like update-grub. It just scans for all bootable systems at boot.

I don’t even know how I would go about doing this.

@realmain

Though this might be the issue. You can try to reinstall grub.

GRUB/Restore the GRUB Bootloader - Manjaro

Another thing you can check is if ntfs-3g is still installed or not, you need that for os-prober to detect it.

I’ve already tried reinstalling grub using a bootable usb. and ntfs-3g does exist on my system.

This is looking more like the windows partition is broken or something. Maybe this is a combination of windows update and the manjaro update causing problems. I will see if the bootable windows usb can see if something is wrong with the partionion maybe.

[Falav]

Can you browse to your Windows partition and access to your data?

[Thraix]

Yes, I can mount and browse the data perfectly.

[Falav]

Odd odd odd… OS prober alone should at least give something.

What’s the actual output of sudo os-prober?

[Thraix]

It gives no output what so ever. Which is why I think the windows partition is broken

[Falav]

Let the below comment as a last resort, but save all your data from Windows and reinstall it.

In the meantime, let’s wait for other suggestions.

[Thraix]

ye, its a weird problem. But I really appreciate your help!

[Falav]

Could you post the result of lsblk --output NAME,SIZE,TYPE,FSTYPE,MOUNTPOINT ?

[Thraix]

NAME     SIZE TYPE FSTYPE MOUNTPOINT
    sda    931.5G disk        
    ├─sda1   300M part vfat   /boot/efi
    ├─sda2 672.4G part ext4   /
    ├─sda3    16M part        
    ├─sda4 249.5G part ntfs   /mnt/harddrive
    ├─sda5   529M part ntfs   
    └─sda6   8.8G part swap   [SWAP]

the windows partition is the sda4, mounted to /mnt/harddrive currently. I’ve tried running update-grub with it mounted and not.

[Falav]

Have you the ability to boot on Windows directly from BIOS or when typing F… (F12 for my Dell) at manufacturer’s logo?

Just a total guess, I don’t know if it’s possible (apart from Grub) to boot from another partition of the same disk.

I have myself Windows installed on a second HDD and can boot from BIOS if Grub doesn’t work as recently anf if the need would arise (which won’t).

[Thraix]

No, since they are on the same drive. I cannot change the order of partitions.

[Thraix]

Alright, so I finally solved my problems I think. Whenever I did the boot-repair through the usb, I don’t think I booted the USB through EFI, so the /sys/firmware/efi didn’t exist, meaning I think did the guide for BIOS. Which I guess somehow broke my system since I was now forced to boot into BIOS and not efi. And I guess my windows was on the efi boot system (not entirely sure what is happening here tbh).

So my solution:
Boot manjaro on USB using UEFI and repair grub using the EFI guide. Then update-grub finally finds my windows partition!

Thanks for trying to help anyways @Falav