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Duel Boot Problems

Ask for help with issues regarding the Installations of the Debian O/S.
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0x7DEB
Posts: 3
Joined: 2018-02-02 02:21

Duel Boot Problems

#1 Post by 0x7DEB »

Hi there,

I'm having problems with duel boot, I even did what the Debian wiki said "Install Windows in GPT".

I installed windows 10 first in GPT then I duel booted Debian with 16GB swap space and rest for /ext4 (256 for Debian and 256 for windows) it auto partitioned for me. I have 512GB HDD. I can see in fdisk -l that windows is there but cant boot into it.

Then I rebooted and there was no grub or debian it went str8 to windows, so I ran a command

Code: Select all

bcdedit /set {bootmgr} path \EFI\debian\grubx64.efi
as shown in some forums.

Now I cant boot into windows, only boots into debian, I can see grub but no option for windows 10, please help all my work is in windows :( I love Debian.

I have also tried

menuentry "WIndows" {
insmod chain
insmod ntfs
set root={hd0,1}
chainloader +1
}

There was also another way to do with UUID but not sure how that works and cant find correct UUID

Also btw secure boot and fast boot is off.

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Head_on_a_Stick
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Re: Duel Boot Problems

#2 Post by Head_on_a_Stick »

0x7DEB wrote:I have also tried

menuentry "WIndows" {
insmod chain
insmod ntfs
set root={hd0,1}
chainloader +1
}
^ That's for non-UEFI Windows systems, for UEFI systems point the chainloader to /EFI/Microsoft/Boot/bootmgfw.efi with the EFI system partition set as the root.

EDIT: and drop the insmod stuff, I never need those lines.
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p.H
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Re: Duel Boot Problems

#3 Post by p.H »

You may need to adjust the partition numbers to match the EFI partition.
The proper menu entry should be added automatically by update-grub if os-prober is installed and not disabled /etc/default/grub.

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